Area Code 423
Area code 423 is in Tennessee, USA , spanning 25 counties and serving 136 cities, including Chattanooga, Johnson City or Kingsport; it currently uses 750 prefixes, assigned from 423-200-XXXX through 423-999-XXXX.
In service date for area code 423: September 11, 1995.
Area code 423 spans two different time zones. The current local time is either or , depending on where you are calling (city list on this page includes time zones).
For exact NPA boundaries see official 423 area code map
More Tennessee area codes:
Reverse phone lookup
Locate any 423-NXX prefix:
| NPANXX | Area served1 | Date2 |
|---|---|---|
| 423-200 | Morristown | 7/18/2002 |
| 423-201 | Lafollette | 7/18/2002 |
| 423-202 | Johnson City | 12/16/2003 |
| 423-203 | Chattanooga | 2/3/2022 |
| 423-205 | Etowah | 3/9/2016 |
| 423-206 | Chattanooga | 11/30/2018 |
| 423-207 | Midway | N/A |
| 423-208 | Chattanooga | 11/1/2006 |
| 423-209 | Chattanooga | N/A |
| 423-210 | Tellico Plains | N/A |
| 423-212 | Blountville | 7/18/2002 |
| 423-213 | Elizabethton | 11/7/2001 |
| 423-214 | Englewood | N/A |
| 423-215 | Oneida | 12/3/2004 |
| 423-216 | Benton | 4/28/2005 |
| 423-217 | Bristol | 7/18/2002 |
| 423-218 | Johnson City | 7/18/2002 |
| 423-219 | Charleston | 10/1/2019 |
| 423-220 | Erwin | 4/4/2001 |
| 423-221 | Chattanooga | N/A |
| 423-222 | Morristown | N/A |
| 423-223 | Oneida | 11/30/2006 |
| 423-224 | Kingsport | N/A |
| 423-225 | Benton | N/A |
| 423-226 | Church Hill | 5/28/2010 |
| 423-227 | Chattanooga | N/A |
| 423-228 | South Pittsburgh | N/A |
| 423-229 | Kingsport | N/A |
| 423-230 | Kingsport | N/A |
| 423-231 | Morristown | N/A |
| 423-232 | Johnson City | N/A |
| 423-233 | Johnson City | N/A |
| 423-234 | Baileyton | N/A |
| 423-235 | Bulls Gap | N/A |
| 423-236 | Apison | N/A |
| 423-237 | Newport | N/A |
| 423-238 | Ooltewah | N/A |
| 423-239 | Midway (Sullivan) | N/A |
| 423-240 | Chattanooga | N/A |
| 423-241 | Copper Basin | 4/11/2003 |
| 423-242 | Chattanooga | N/A |
| 423-243 | Soddy-Daisy | N/A |
| 423-244 | Cleveland | N/A |
| 423-245 | Kingsport | N/A |
| 423-246 | Kingsport | N/A |
| 423-247 | Kingsport | N/A |
| 423-248 | Newport | N/A |
| 423-249 | Fork Ridge | N/A |
| 423-250 | Cleveland | 4/27/2017 |
| 423-251 | Kingsport | 1/5/2017 |
| 423-252 | Athens | N/A |
| 423-253 | Tellico Plains | N/A |
| 423-254 | Morristown | N/A |
| 423-255 | Chattanooga | N/A |
| 423-256 | Church Hill | N/A |
| 423-257 | Limestone | N/A |
| 423-258 | Morristown | N/A |
| 423-259 | New Tazewell | 4/27/2004 |
| 423-260 | Chattanooga | 8/20/2007 |
| 423-261 | Coker Creek | N/A |
| 423-262 | Johnson City | N/A |
| 423-263 | Etowah | N/A |
| 423-264 | Vonore | 7/21/2011 |
| 423-265 | Chattanooga | N/A |
| 423-266 | Chattanooga | N/A |
| 423-267 | Chattanooga | N/A |
| 423-268 | Johnson City | 6/8/2012 |
| 423-269 | Chattanooga | 1/20/2017 |
| 423-270 | Erwin | 4/24/2013 |
| 423-271 | Sweetwater | 4/14/2011 |
| 423-272 | Rogersville | N/A |
| 423-273 | Morristown | N/A |
| 423-274 | Bristol | N/A |
| 423-275 | Chattanooga | 6/30/2022 |
| 423-276 | Kingsport | N/A |
| 423-277 | Morristown | 8/29/2001 |
| 423-278 | Greeneville | N/A |
| 423-279 | Blountville | N/A |
| 423-280 | Chattanooga | N/A |
| 423-281 | Butler | 11/1/2011 |
| 423-282 | Johnson City | N/A |
| 423-283 | Johnson City | N/A |
| 423-284 | Cleveland | N/A |
| 423-285 | Dayton | N/A |
| 423-286 | Oneida | N/A |
| 423-287 | Chattanooga | N/A |
| 423-288 | Kingsport | N/A |
| 423-289 | Morristown | 6/18/2001 |
| 423-290 | Chattanooga | N/A |
| 423-291 | Mountain City | 8/31/2001 |
| 423-292 | Fall Branch | N/A |
| 423-293 | Rogersville | 8/31/2001 |
| 423-294 | Chattanooga | 4/3/2001 |
| 423-295 | Ball Play | N/A |
| 423-296 | Chattanooga | N/A |
| 423-297 | Elizabethton | N/A |
| 423-298 | Chattanooga | N/A |
| 423-299 | Benton | 11/2/2003 |
| NPANXX | Area served1 | Date2 |
|---|---|---|
| 423-300 | Sneedville | 4/29/2003 |
| 423-301 | South Pittsburgh | 11/28/2011 |
| 423-302 | Johnson City | 11/10/2008 |
| 423-303 | Cleveland | N/A |
| 423-304 | Chattanooga | N/A |
| 423-305 | Chattanooga | 2/23/2007 |
| 423-306 | Midway (Sullivan) | N/A |
| 423-307 | Morristown | 10/24/2005 |
| 423-308 | Chattanooga | N/A |
| 423-309 | Chattanooga | N/A |
| 423-310 | Cleveland | 10/11/2002 |
| 423-312 | Morristown | N/A |
| 423-313 | Chattanooga | 5/9/2001 |
| 423-314 | Chattanooga | N/A |
| 423-315 | Chattanooga | N/A |
| 423-316 | Chattanooga | N/A |
| 423-317 | Morristown | N/A |
| 423-318 | Morristown | N/A |
| 423-319 | Huntsville | N/A |
| 423-320 | Chattanooga | N/A |
| 423-321 | Chattanooga | N/A |
| 423-322 | Chattanooga | N/A |
| 423-323 | Blountville | N/A |
| 423-324 | Petros | N/A |
| 423-325 | Blountville | N/A |
| 423-326 | Chattanooga | N/A |
| 423-327 | Bulls Gap | N/A |
| 423-328 | Johnson City | 2/19/2008 |
| 423-329 | Greeneville | 3/6/2002 |
| 423-330 | Erwin | 3/6/2002 |
| 423-331 | Cleveland | N/A |
| 423-332 | Soddy-Daisy | N/A |
| 423-333 | Athens | N/A |
| 423-334 | Decatur | N/A |
| 423-335 | Midway (Sullivan) | N/A |
| 423-336 | Charleston | N/A |
| 423-337 | Sweetwater | N/A |
| 423-338 | Benton | N/A |
| 423-339 | Cleveland | N/A |
| 423-340 | Bristol | N/A |
| 423-341 | Bristol | N/A |
| 423-342 | Elizabethton | 3/6/2002 |
| 423-343 | Kingsport | N/A |
| 423-344 | Chattanooga | N/A |
| 423-345 | Surgoinsville | N/A |
| 423-346 | Wartburg | N/A |
| 423-347 | Rogersville | N/A |
| 423-348 | Fall Branch | N/A |
| 423-349 | Sullivan Gardens | N/A |
| 423-350 | Bristol | 7/1/2022 |
| 423-351 | Sweetwater | N/A |
| 423-352 | Lafollette | N/A |
| 423-353 | Morristown | 3/16/2011 |
| 423-354 | Blountville | N/A |
| 423-355 | Chattanooga | N/A |
| 423-356 | Chattanooga | 2/28/2001 |
| 423-357 | Church Hill | N/A |
| 423-358 | Rogersville | 3/7/2002 |
| 423-359 | Greeneville | 8/13/2002 |
| 423-360 | Midway (Sullivan) | N/A |
| 423-361 | Midway (Sullivan) | N/A |
| 423-362 | Chattanooga | N/A |
| 423-363 | Huntsville | 2/22/2001 |
| 423-364 | Chattanooga | N/A |
| 423-365 | Spring City | N/A |
| 423-366 | Bristol | N/A |
| 423-367 | Kingsport | N/A |
| 423-368 | Athens | N/A |
| 423-369 | Oakdale | N/A |
| 423-370 | Athens | N/A |
| 423-371 | Sweetwater | N/A |
| 423-372 | Jellico | N/A |
| 423-373 | Bulls Gap | N/A |
| 423-374 | Lafollette | N/A |
| 423-375 | Benton | 3/18/2010 |
| 423-376 | Madisonville | N/A |
| 423-377 | Lafollette | N/A |
| 423-378 | Kingsport | N/A |
| 423-379 | Newport | N/A |
| 423-380 | Cleveland | N/A |
| 423-381 | Athens | N/A |
| 423-382 | Sneedville | N/A |
| 423-383 | Bristol | 11/14/2001 |
| 423-384 | Fall Branch | 11/14/2001 |
| 423-385 | Chattanooga | N/A |
| 423-386 | Chattanooga | N/A |
| 423-387 | Johnson City | 10/11/2022 |
| 423-388 | Erwin | 3/22/2002 |
| 423-389 | Midway (Sullivan) | 5/9/2002 |
| 423-390 | Kingsport | 8/13/2002 |
| 423-391 | Bluff City | N/A |
| 423-392 | Kingsport | N/A |
| 423-393 | Bulls Gap | N/A |
| 423-394 | Chattanooga | N/A |
| 423-395 | Athens | 11/4/2022 |
| 423-396 | College Dale | N/A |
| 423-397 | Benton | 7/6/2017 |
| 423-398 | Kingsport | 3/1/2011 |
| 423-399 | Lafollette | 12/2/2003 |
| NPANXX | Area served1 | Date2 |
|---|---|---|
| 423-400 | Chattanooga | N/A |
| 423-401 | Soddy-Daisy | N/A |
| 423-402 | Chattanooga | 6/20/2008 |
| 423-403 | South Pittsburgh | 5/1/2017 |
| 423-404 | Madisonville | N/A |
| 423-405 | Athens | 3/29/2011 |
| 423-406 | Midway (Sullivan) | 3/13/2008 |
| 423-407 | Spring City | 1/10/2020 |
| 423-408 | Kingsport | 10/29/2009 |
| 423-409 | Bulls Gap | N/A |
| 423-410 | Johnson City | N/A |
| 423-412 | Johnson City | N/A |
| 423-413 | Chattanooga | N/A |
| 423-414 | Chattanooga | 4/1/2010 |
| 423-415 | Newport | 3/11/2010 |
| 423-416 | Midway (Sullivan) | N/A |
| 423-417 | Chattanooga | 8/23/2017 |
| 423-418 | Midway (Sullivan) | N/A |
| 423-419 | Cumberland Gap | 2/21/2012 |
| 423-420 | Madisonville | N/A |
| 423-421 | Chattanooga | N/A |
| 423-422 | Mosheim | N/A |
| 423-424 | Chattanooga | N/A |
| 423-425 | Chattanooga | 12/11/2001 |
| 423-426 | Limestone | 3/5/2002 |
| 423-427 | Johnson City | 3/5/2018 |
| 423-428 | Dayton | 4/22/2002 |
| 423-429 | Kingsport | 1/21/2008 |
| 423-430 | Johnson City | 3/11/2013 |
| 423-431 | Johnson City | N/A |
| 423-432 | Chattanooga | N/A |
| 423-433 | Johnson City | N/A |
| 423-434 | Johnson City | N/A |
| 423-435 | Athens | 5/2/2002 |
| 423-436 | Madisonville | 5/2/2002 |
| 423-437 | Lafollette | 5/2/2002 |
| 423-438 | Morristown | 5/2/2002 |
| 423-439 | Johnson City | N/A |
| 423-440 | Elizabethton | 10/14/2009 |
| 423-441 | Cumberland Gap | 1/7/2003 |
| 423-442 | Madisonville | N/A |
| 423-443 | Chattanooga | 5/7/2002 |
| 423-444 | Limestone | 1/8/2010 |
| 423-445 | Surgoinsville | 6/25/2002 |
| 423-446 | Fall Branch | 7/6/2002 |
| 423-447 | Pikeville | N/A |
| 423-448 | Pikeville | 9/23/2009 |
| 423-449 | Lafollette | 6/13/2002 |
| 423-450 | Mosheim | 10/23/2008 |
| 423-451 | Soddy-Daisy | N/A |
| 423-452 | Spring City | N/A |
| 423-453 | Athens | 6/18/2002 |
| 423-454 | Decatur | 10/26/2004 |
| 423-455 | Jellico | 10/7/2002 |
| 423-456 | Lafollette | N/A |
| 423-457 | Cleveland | 11/13/2008 |
| 423-458 | Cleveland | 4/2/2012 |
| 423-459 | Chattanooga | 1/16/2018 |
| 423-460 | Mountain City | 9/2/2010 |
| 423-461 | Johnson City | N/A |
| 423-462 | Riceville | N/A |
| 423-463 | Chattanooga | 9/7/2006 |
| 423-464 | Cleveland | 2/27/2009 |
| 423-465 | Newport | 7/1/2005 |
| 423-466 | Athens | 10/25/2017 |
| 423-467 | Midway | N/A |
| 423-468 | Chattanooga | 5/6/2006 |
| 423-469 | Newport | N/A |
| 423-470 | Greeneville | 7/28/2003 |
| 423-471 | Mountain City | 7/28/2003 |
| 423-472 | Cleveland | N/A |
| 423-473 | Cleveland | N/A |
| 423-474 | Stoney Creek | N/A |
| 423-475 | Chattanooga | 11/6/2007 |
| 423-476 | Cleveland | N/A |
| 423-477 | Midway | N/A |
| 423-478 | Cleveland | N/A |
| 423-479 | Cleveland | N/A |
| 423-480 | Kingsport | 2/10/2012 |
| 423-481 | Roan Mountain | 9/1/2011 |
| 423-482 | Blountville | 6/7/2002 |
| 423-483 | Johnson City | 6/7/2002 |
| 423-484 | Bristol | 6/7/2002 |
| 423-485 | Chattanooga | N/A |
| 423-486 | Chattanooga | 6/9/2010 |
| 423-487 | Newport | N/A |
| 423-488 | Chattanooga | N/A |
| 423-489 | Cumberland Gap | 11/2/2004 |
| 423-490 | Chattanooga | N/A |
| 423-491 | Johnson City | 6/21/2013 |
| 423-492 | Morristown | 4/7/2011 |
| 423-493 | Chattanooga | N/A |
| 423-494 | Lafollette | 2/4/2003 |
| 423-495 | Chattanooga | N/A |
| 423-496 | Copper Basin | N/A |
| 423-497 | Chattanooga | 2/3/2017 |
| 423-498 | Chattanooga | 2/1/2017 |
| 423-499 | Chattanooga | N/A |
| NPANXX | Area served1 | Date2 |
|---|---|---|
| 423-500 | Rogersville | 3/28/2016 |
| 423-501 | Mountain City | 10/25/2017 |
| 423-502 | Midway (Sullivan) | N/A |
| 423-503 | Chattanooga | N/A |
| 423-504 | Chattanooga | N/A |
| 423-505 | Chattanooga | N/A |
| 423-506 | Athens | N/A |
| 423-507 | Athens | N/A |
| 423-508 | Chattanooga | N/A |
| 423-509 | Chattanooga | 10/24/2008 |
| 423-510 | Chattanooga | N/A |
| 423-512 | Stoney Creek | 8/4/2003 |
| 423-513 | Vonore | 11/8/2022 |
| 423-514 | Chattanooga | N/A |
| 423-515 | South Pittsburgh | 10/1/2019 |
| 423-516 | Sullivan Gardens | 2/21/2012 |
| 423-517 | Chattanooga | N/A |
| 423-518 | Elizabethton | 5/24/2012 |
| 423-519 | Tellico Plains | N/A |
| 423-520 | Madisonville | N/A |
| 423-521 | Chattanooga | 6/10/2008 |
| 423-522 | Morristown | 12/5/2002 |
| 423-523 | Bulls Gap | 5/9/2002 |
| 423-524 | Johnson City | 2/6/2018 |
| 423-525 | Greeneville | 5/14/2008 |
| 423-526 | New Tazewell | N/A |
| 423-527 | Soddy-Daisy | 11/9/2022 |
| 423-528 | Baileyton | N/A |
| 423-529 | Georgetown | 4/17/2006 |
| 423-530 | Kingsport | 3/15/2012 |
| 423-531 | Chattanooga | 9/16/2008 |
| 423-532 | Newport | N/A |
| 423-533 | Nine Mile | N/A |
| 423-534 | Bristol | N/A |
| 423-535 | Chattanooga | 7/9/2003 |
| 423-536 | Sweetwater | N/A |
| 423-537 | Bulls Gap | N/A |
| 423-538 | Bluff City | N/A |
| 423-539 | Oneida | N/A |
| 423-540 | Newport | 2/15/2018 |
| 423-541 | Chattanooga | 3/20/2018 |
| 423-542 | Elizabethton | N/A |
| 423-543 | Elizabethton | N/A |
| 423-544 | Chattanooga | 9/14/2001 |
| 423-545 | Madisonville | 8/20/2002 |
| 423-546 | Bulls Gap | 8/20/2002 |
| 423-547 | Elizabethton | N/A |
| 423-548 | Copper Basin | 7/11/2005 |
| 423-549 | Johnson City | 3/23/2018 |
| 423-550 | Midway | 01/25/2023 |
| 423-551 | Chattanooga | 2/27/2014 |
| 423-552 | Greeneville | N/A |
| 423-553 | Chattanooga | N/A |
| 423-554 | College Station | N/A |
| 423-556 | Soddy-Daisy | 8/30/2018 |
| 423-557 | Johnson City | 9/29/2004 |
| 423-558 | Chattanooga | N/A |
| 423-559 | Cleveland | N/A |
| 423-560 | Erwin | 8/16/2018 |
| 423-561 | Sweetwater | 4/18/2014 |
| 423-562 | Lafollette | N/A |
| 423-563 | Lafollette | N/A |
| 423-564 | Rogersville | 5/25/2018 |
| 423-565 | Decatur | 8/30/2018 |
| 423-566 | Lafollette | N/A |
| 423-567 | Dayton | 11/26/2008 |
| 423-568 | Niota | N/A |
| 423-569 | Oneida | N/A |
| 423-570 | Dayton | N/A |
| 423-571 | Midway (Sullivan) | N/A |
| 423-572 | Englewood | N/A |
| 423-573 | Bristol | 7/7/2006 |
| 423-574 | Blountville | 7/7/2006 |
| 423-575 | Bluff City | 7/7/2006 |
| 423-576 | Elizabethton | 06/15/2023 |
| 423-577 | Oneida | N/A |
| 423-578 | Kingsport | N/A |
| 423-579 | Kingsport | 2/13/2009 |
| 423-580 | Chattanooga | N/A |
| 423-581 | Morristown | N/A |
| 423-582 | Chattanooga | 8/10/2009 |
| 423-583 | Sullivan Gardens | 9/26/2018 |
| 423-584 | Cleveland | N/A |
| 423-585 | Morristown | N/A |
| 423-586 | Morristown | N/A |
| 423-587 | Morristown | N/A |
| 423-588 | Greeneville | 1/7/2010 |
| 423-589 | Georgetown | 4/9/2019 |
| 423-590 | South Pittsburgh | 5/3/2019 |
| 423-591 | Chattanooga | 1/3/2008 |
| 423-592 | Lafollette | N/A |
| 423-593 | Chattanooga | N/A |
| 423-594 | Dayton | 9/16/2009 |
| 423-595 | Chattanooga | 4/12/2001 |
| 423-596 | Chattanooga | N/A |
| 423-597 | Benton | 5/22/2019 |
| 423-598 | Chattanooga | N/A |
| 423-599 | Cleveland | 1/7/2010 |
| NPANXX | Area served1 | Date2 |
|---|---|---|
| 423-600 | Apison | 3/19/2007 |
| 423-601 | Bulls Gap | 2/3/2005 |
| 423-602 | Chattanooga | 6/8/2012 |
| 423-603 | Fork Ridge | 12/13/2013 |
| 423-604 | Etowah | N/A |
| 423-605 | Chattanooga | N/A |
| 423-606 | Englewood | 2/26/2007 |
| 423-607 | Limestone | 2/17/2014 |
| 423-608 | Newport | N/A |
| 423-609 | Greeneville | 8/12/2014 |
| 423-610 | Johnson City | N/A |
| 423-612 | Bristol | N/A |
| 423-613 | Newport | N/A |
| 423-614 | Cleveland | N/A |
| 423-615 | College Dale | 3/19/2007 |
| 423-616 | Morristown | 8/18/2014 |
| 423-617 | Athens | 10/7/2013 |
| 423-618 | Chattanooga | N/A |
| 423-619 | Chattanooga | N/A |
| 423-620 | Greeneville | N/A |
| 423-621 | Morristown | N/A |
| 423-622 | Chattanooga | N/A |
| 423-623 | Newport | N/A |
| 423-624 | Chattanooga | N/A |
| 423-625 | Newport | N/A |
| 423-626 | New Tazewell | N/A |
| 423-627 | Robbins | N/A |
| 423-628 | Sunbright | N/A |
| 423-629 | Chattanooga | N/A |
| 423-630 | Johnson City | 9/25/2007 |
| 423-631 | Johnson City | 4/8/2008 |
| 423-632 | Wartburg | 6/24/2019 |
| 423-633 | Chattanooga | 12/17/2019 |
| 423-634 | Chattanooga | N/A |
| 423-635 | Chattanooga | N/A |
| 423-636 | Greeneville | N/A |
| 423-637 | Chattanooga | 6/9/2008 |
| 423-638 | Greeneville | N/A |
| 423-639 | Greeneville | N/A |
| 423-640 | Sneedville | 3/27/2020 |
| 423-641 | Cleveland | 4/7/2014 |
| 423-642 | Chattanooga | N/A |
| 423-643 | Chattanooga | 8/14/2002 |
| 423-644 | Soddy-Daisy | 3/9/2020 |
| 423-645 | Chattanooga | N/A |
| 423-646 | Bristol | N/A |
| 423-647 | Butler | N/A |
| 423-648 | Chattanooga | N/A |
| 423-649 | Athens | N/A |
| 423-650 | Cleveland | N/A |
| 423-651 | Jasper | 5/8/2014 |
| 423-652 | Bristol | N/A |
| 423-653 | Chattanooga | N/A |
| 423-654 | Chattanooga | 7/21/2020 |
| 423-655 | Chattanooga | N/A |
| 423-656 | Johnson City | 7/22/2020 |
| 423-657 | Mosheim | 1/28/2015 |
| 423-658 | Whitwell | N/A |
| 423-659 | Copper Basin | 8/4/2020 |
| 423-660 | Chattanooga | 9/16/2020 |
| 423-661 | Chattanooga | 8/12/2014 |
| 423-662 | Blountville | N/A |
| 423-663 | Huntsville | N/A |
| 423-664 | Chattanooga | N/A |
| 423-665 | Charleston | 10/26/2004 |
| 423-666 | Elizabethton | 5/17/2018 |
| 423-667 | Chattanooga | N/A |
| 423-668 | Chattanooga | N/A |
| 423-669 | Benton | 08/11/2023 |
| 423-670 | Johnson City | 9/23/2020 |
| 423-671 | Chattanooga | 9/29/2020 |
| 423-672 | Johnson City | 12/27/2019 |
| 423-673 | Johnson City | 4/13/2021 |
| 423-674 | Dayton | 4/13/2021 |
| 423-675 | Jasper | 4/13/2021 |
| 423-676 | Johnson City | N/A |
| 423-677 | Fall Branch | N/A |
| 423-678 | Roan Mountain | 4/15/2021 |
| 423-679 | Ooltewah | 4/13/2021 |
| 423-680 | Chattanooga | 3/30/2016 |
| 423-681 | Chattanooga | 1/14/2015 |
| 423-682 | Chattanooga | 1/14/2016 |
| 423-683 | Elizabethton | N/A |
| 423-684 | Greeneville | N/A |
| 423-685 | Johnson City | N/A |
| 423-686 | Fork Ridge | 4/15/2021 |
| 423-687 | Pikeville | 5/13/2021 |
| 423-688 | Sneedville | 5/17/2021 |
| 423-689 | Bristol | 7/1/2021 |
| 423-690 | Morristown | 12/2/2016 |
| 423-691 | Athens | 9/1/2021 |
| 423-692 | Butler | 9/1/2021 |
| 423-693 | Chattanooga | 5/19/2006 |
| 423-694 | Sweetwater | 9/8/2021 |
| 423-695 | Erwin | N/A |
| 423-696 | Rogersville | 9/16/2021 |
| 423-697 | Chattanooga | N/A |
| 423-698 | Chattanooga | N/A |
| 423-699 | Mountain City | N/A |
| NPANXX | Area served1 | Date2 |
|---|---|---|
| 423-701 | Robbins | 1/30/2014 |
| 423-702 | Chattanooga | 2/14/2006 |
| 423-703 | Coker Creek | 11/21/2019 |
| 423-704 | Chattanooga | N/A |
| 423-705 | Johnson City | 12/2/2021 |
| 423-707 | Elizabethton | 12/11/2009 |
| 423-708 | Chattanooga | 10/8/2014 |
| 423-709 | Cleveland | N/A |
| 423-710 | Chattanooga | 6/19/2007 |
| 423-712 | Bluff City | 1/26/2015 |
| 423-713 | Chattanooga | 6/5/2015 |
| 423-714 | Morristown | N/A |
| 423-715 | Cleveland | N/A |
| 423-716 | Cleveland | N/A |
| 423-717 | Athens | 4/29/2015 |
| 423-718 | Chattanooga | N/A |
| 423-719 | Chattanooga | 12/2/2021 |
| 423-720 | Newport | 5/20/2015 |
| 423-721 | Newport | N/A |
| 423-722 | Johnson City | N/A |
| 423-723 | Kingsport | N/A |
| 423-724 | Sneedville | N/A |
| 423-725 | Hampton | N/A |
| 423-726 | Midway (Sullivan) | N/A |
| 423-727 | Mountain City | N/A |
| 423-728 | Cleveland | N/A |
| 423-729 | Fall Creek Falls | 06/25/2024 |
| 423-730 | Riceville | 2/26/2007 |
| 423-732 | Kingsport | 8/11/2015 |
| 423-733 | Sneedville | N/A |
| 423-734 | Rogersville | 1/9/2020 |
| 423-735 | Erwin | N/A |
| 423-736 | Morristown | N/A |
| 423-737 | Johnson City | N/A |
| 423-738 | Bristol | 12/14/2021 |
| 423-739 | Shady Valley | N/A |
| 423-740 | Cleveland | 12/15/2021 |
| 423-741 | Johnson City | N/A |
| 423-742 | Bristol | N/A |
| 423-743 | Erwin | N/A |
| 423-744 | Athens | N/A |
| 423-745 | Athens | N/A |
| 423-746 | Athens | N/A |
| 423-747 | Johnson City | N/A |
| 423-748 | Morristown | N/A |
| 423-749 | College Dale | 12/29/2021 |
| 423-750 | Chattanooga | 9/3/2021 |
| 423-751 | Chattanooga | N/A |
| 423-752 | Chattanooga | N/A |
| 423-753 | Jonesboro | N/A |
| 423-754 | Rogersville | N/A |
| 423-755 | Chattanooga | N/A |
| 423-756 | Chattanooga | N/A |
| 423-757 | Chattanooga | N/A |
| 423-758 | Bristol | N/A |
| 423-759 | Morristown | 9/1/2021 |
| 423-760 | Chattanooga | N/A |
| 423-761 | Copper Basin | 8/1/2006 |
| 423-762 | Chattanooga | N/A |
| 423-763 | Chattanooga | N/A |
| 423-764 | Bristol | N/A |
| 423-765 | Kingsport | 12/2/2004 |
| 423-766 | Limestone | 1/20/2021 |
| 423-767 | Johnson City | 1/9/2001 |
| 423-768 | Butler | N/A |
| 423-769 | Benton | 12/15/2021 |
| 423-770 | Church Hill | 8/16/2018 |
| 423-771 | Chattanooga | 1/6/2010 |
| 423-772 | Roan Mountain | N/A |
| 423-773 | Johnson City | 2/9/2001 |
| 423-774 | Soddy-Daisy | N/A |
| 423-775 | Dayton | N/A |
| 423-776 | Pikeville | 12/30/2021 |
| 423-777 | Chattanooga | 10/6/2014 |
| 423-778 | Chattanooga | N/A |
| 423-779 | Chattanooga | N/A |
| 423-780 | Charleston | N/A |
| 423-781 | Etowah | 3/1/2004 |
| 423-782 | Kingsport | N/A |
| 423-783 | Greeneville | N/A |
| 423-784 | Jellico | N/A |
| 423-785 | Chattanooga | N/A |
| 423-786 | Bluff City | 08/11/2023 |
| 423-787 | Greeneville | N/A |
| 423-788 | Jonesboro | N/A |
| 423-789 | Bristol | 8/13/2002 |
| 423-790 | Cleveland | 4/12/2006 |
| 423-791 | Johnson City | N/A |
| 423-792 | Oakdale | 02/21/2024 |
| 423-793 | Bristol | N/A |
| 423-794 | Johnson City | N/A |
| 423-795 | Johnson City | N/A |
| 423-796 | Johnson City | 2/1/2022 |
| 423-797 | Bristol | N/A |
| 423-798 | Greeneville | N/A |
| 423-799 | Spring City | 10/26/2004 |
| NPANXX | Area served1 | Date2 |
|---|---|---|
| 423-800 | Chattanooga | 2/10/2011 |
| 423-801 | Cumberland Gap | 12/19/2007 |
| 423-802 | Chattanooga | N/A |
| 423-803 | Chattanooga | 1/4/2016 |
| 423-804 | Bristol | 2/3/2022 |
| 423-805 | Chattanooga | 6/14/2013 |
| 423-806 | Midway | 5/20/2015 |
| 423-807 | Madisonville | N/A |
| 423-808 | Tellico Plains | 9/14/2007 |
| 423-809 | Pikeville | 05/18/2023 |
| 423-810 | Charleston | 8/3/2015 |
| 423-812 | Greeneville | 8/23/2016 |
| 423-813 | Cleveland | 10/8/2015 |
| 423-814 | Sweetwater | N/A |
| 423-815 | Whitwell | 9/14/2007 |
| 423-816 | Bristol | 12/1/2022 |
| 423-817 | Kingsport | N/A |
| 423-818 | Jellico | 9/21/2016 |
| 423-819 | Cleveland | 12/30/2022 |
| 423-820 | Greeneville | 5/17/2018 |
| 423-821 | Chattanooga | N/A |
| 423-822 | Chattanooga | N/A |
| 423-823 | Greeneville | N/A |
| 423-824 | Erwin | 08/11/2023 |
| 423-825 | Chattanooga | N/A |
| 423-826 | Chattanooga | N/A |
| 423-827 | Chattanooga | N/A |
| 423-829 | Charleston | N/A |
| 423-830 | Kingsport | 5/17/2018 |
| 423-831 | Greeneville | 03/02/2023 |
| 423-832 | Clinchport | 1/13/2022 |
| 423-833 | Johnson City | N/A |
| 423-834 | Chattanooga | N/A |
| 423-835 | Bristol | 03/16/2023 |
| 423-836 | Sweetwater | N/A |
| 423-837 | South Pittsburgh | N/A |
| 423-838 | Chattanooga | N/A |
| 423-839 | Morristown | N/A |
| 423-840 | Butler | 5/17/2018 |
| 423-841 | Mountain City | 04/06/2023 |
| 423-842 | Chattanooga | N/A |
| 423-843 | Chattanooga | N/A |
| 423-844 | Bristol | N/A |
| 423-845 | Bristol | 3/30/2005 |
| 423-846 | Chattanooga | N/A |
| 423-847 | Chattanooga | N/A |
| 423-848 | Johnson City | 9/3/2021 |
| 423-849 | Johnson City | 05/05/2023 |
| 423-850 | Jonesboro | 5/21/2018 |
| 423-851 | New Tazewell | N/A |
| 423-852 | Dunlap | 05/18/2023 |
| 423-853 | Johnson City | 1/21/2022 |
| 423-854 | Johnson City | N/A |
| 423-855 | Chattanooga | N/A |
| 423-856 | Athens | 9/16/2016 |
| 423-857 | Kingsport | N/A |
| 423-858 | Blountville | 08/11/2023 |
| 423-859 | Rogersville | 05/31/2023 |
| 423-860 | Chattanooga | 7/1/2022 |
| 423-862 | Spring City | 08/22/2023 |
| 423-863 | Kingsport | N/A |
| 423-864 | Decatur | 05/18/2023 |
| 423-866 | Niota | 08/07/2023 |
| 423-867 | Chattanooga | N/A |
| 423-868 | Mosheim | 08/22/2023 |
| 423-869 | Cumberland Gap | N/A |
| 423-870 | Chattanooga | N/A |
| 423-871 | Lafollette | N/A |
| 423-872 | Chattanooga | 05/23/2023 |
| 423-873 | Stoney Creek | 7/15/2020 |
| 423-874 | Chattanooga | N/A |
| 423-875 | Chattanooga | N/A |
| 423-876 | Chattanooga | N/A |
| 423-877 | Chattanooga | N/A |
| 423-878 | Bristol | N/A |
| 423-879 | Georgetown | 08/22/2023 |
| 423-880 | Johnson City | 3/31/2021 |
| 423-881 | Fall Creek Falls | N/A |
| 423-882 | Chattanooga | 10/26/2011 |
| 423-883 | Chattanooga | N/A |
| 423-884 | Vonore | N/A |
| 423-885 | Englewood | N/A |
| 423-886 | Chattanooga | N/A |
| 423-887 | Englewood | N/A |
| 423-888 | Chattanooga | 8/17/2015 |
| 423-889 | Cleveland | 08/30/2023 |
| 423-890 | Bristol | 09/06/2023 |
| 423-892 | Chattanooga | N/A |
| 423-893 | Chattanooga | N/A |
| 423-894 | Chattanooga | N/A |
| 423-895 | Elizabethton | N/A |
| 423-896 | Hampton | N/A |
| 423-897 | Fall Branch | N/A |
| 423-898 | Charleston | 10/12/2023 |
| 423-899 | Chattanooga | N/A |
| NPANXX | Area served1 | Date2 |
|---|---|---|
| 423-900 | Johnson City | 2/16/2011 |
| 423-902 | Chattanooga | N/A |
| 423-903 | Chattanooga | N/A |
| 423-904 | Chattanooga | 4/13/2021 |
| 423-905 | Johnson City | 4/13/2021 |
| 423-906 | Johnson City | 10/24/2023 |
| 423-907 | Lafollette | N/A |
| 423-908 | Surgoinsville | 01/09/2024 |
| 423-909 | South Pittsburgh | 05/18/2023 |
| 423-910 | Ooltewah | 3/19/2007 |
| 423-912 | Lafollette | N/A |
| 423-913 | Jonesboro | N/A |
| 423-914 | Bristol | N/A |
| 423-915 | Johnson City | N/A |
| 423-917 | Blountville | N/A |
| 423-919 | New Tazewell | 10/1/2019 |
| 423-920 | Athens | N/A |
| 423-921 | Rogersville | N/A |
| 423-922 | Baileyton | 7/15/2020 |
| 423-923 | Rogersville | N/A |
| 423-925 | Lafollette | 3/23/2022 |
| 423-926 | Johnson City | N/A |
| 423-927 | Morristown | 3/1/2022 |
| 423-928 | Johnson City | N/A |
| 423-929 | Johnson City | N/A |
| 423-930 | Johnson City | 2/13/2009 |
| 423-932 | Etowah | 1/20/2022 |
| 423-933 | Chattanooga | 6/14/2002 |
| 423-934 | Surgoinsville | 3/18/2021 |
| 423-935 | Oneida | 02/26/2024 |
| 423-936 | Sunbright | 05/14/2024 |
| 423-938 | Johnson City | 8/13/2002 |
| 423-939 | Jasper | 6/21/2005 |
| 423-940 | Dayton | 03/20/2023 |
| 423-941 | Deer Lodge | 05/14/2024 |
| 423-942 | Jasper | N/A |
| 423-943 | Johnson City | N/A |
| 423-944 | Clinchport | N/A |
| 423-946 | Johnson City | 3/9/2001 |
| 423-948 | Limestone | N/A |
| 423-949 | Dunlap | N/A |
| 423-951 | Charleston | 06/06/2024 |
| 423-952 | Johnson City | N/A |
| 423-953 | Johnson City | N/A |
| 423-954 | Chattanooga | N/A |
| 423-955 | Whitwell | 7/15/2020 |
| 423-956 | Bristol | N/A |
| 423-957 | Hampton | N/A |
| 423-961 | Georgetown | N/A |
| 423-963 | Kingsport | 3/9/2001 |
| 423-965 | Deer Lodge | N/A |
| 423-966 | Ball Play | 7/15/2020 |
| 423-967 | Kingsport | N/A |
| 423-968 | Bristol | N/A |
| 423-972 | Greeneville | N/A |
| 423-973 | Sneedville | 4/30/2002 |
| 423-975 | Johnson City | N/A |
| 423-977 | Chattanooga | 7/18/2019 |
| 423-979 | Johnson City | N/A |
| 423-980 | Chattanooga | 3/31/2021 |
| 423-987 | Chattanooga | N/A |
| 423-989 | Bristol | N/A |
| 423-990 | Bristol | N/A |
| 423-991 | Chattanooga | N/A |
| 423-994 | Chattanooga | 5/10/2007 |
| 423-998 | Jellico | 10/10/2022 |
| 423-999 | Athens | 3/30/2011 |
- For 'Area served' we list the rate center. In the North American Numbering Plan a rate center is a geographic area used to determine local calling boundaries for billing purposes. Its name is generally a locality, often not the only one served by an NPA-NXX combination.
- Assignment date. N/A - mostly central office codes assigned before 2001.
- NXX prefixes last updated: August 27, 2024
Cities in area code 423
| City1 | County | Time2 |
|---|---|---|
| Afton | Greene | E |
| Apison | Hamilton | E |
| Arthur | Claiborne | E |
| Athens | McMinn | E |
| Bakewell | Hamilton | E |
| Benton | Polk | E |
| Birchwood | Hamilton | E |
| Blountville | Sullivan | E |
| Bluff City | Sullivan | E |
| Bristol | Sullivan | E |
| Bulls Gap | Hawkins | E |
| Butler | Johnson | E |
| Bybee | Cocke | E |
| Calhoun | McMinn | E |
| Caryville | Campbell | E |
| Charleston | Bradley | E |
| Chattanooga | Hamilton | E |
| Chuckey | Greene | E |
| Church Hill | Hawkins | E |
| Clairfield | Claiborne | E |
| Cleveland | Bradley | E |
| Coalfield | Morgan | E |
| Coker Creek | Monroe | E |
| Collegedale | Hamilton | E |
| Conasauga | Polk | E |
| Copperhill | Polk | E |
| Cosby | Cocke | E |
| Cumberland Gap | Claiborne | E |
| Dayton | Rhea | E |
| Decatur | Meigs | E |
| Deer Lodge | Morgan | E |
| Del Rio | Cocke | E |
| Delano | Polk | E |
| Ducktown | Polk | E |
| Duff | Campbell | E |
| Dunlap | Sequatchie | C |
| Eagan | Claiborne | E |
| Eidson | Hawkins | E |
| Elgin | Scott | E |
| Elizabethton | Carter | E |
| Englewood | McMinn | E |
| Erwin | Unicoi | E |
| Etowah | McMinn | E |
| Evensville | Rhea | E |
| Fall Branch | Washington | E |
| Farner | Polk | E |
| Flag Pond | Unicoi | E |
| Georgetown | Meigs | E |
| Grandview | Rhea | E |
| Graysville | Rhea | E |
| Greeneville | Greene | E |
| Guild | Marion | C |
| Hampton | Carter | E |
| Harrison | Hamilton | E |
| Harrogate | Claiborne | E |
| Hartford | Cocke | E |
| Helenwood | Scott | E |
| Hixson | Hamilton | E |
| Huntsville | Scott | E |
| Jacksboro | Campbell | E |
| Jasper | Marion | C |
| Jellico | Campbell | E |
| Johnson City | Washington | E |
| Jonesborough | Washington | E |
| Kingsport | Sullivan | E |
| Kyles Ford | Hancock | E |
| LaFollette | Campbell | E |
| Lancing | Morgan | E |
| Laurel Bloomery | Johnson | E |
| Limestone | Washington | E |
| Lone Mountain | Claiborne | E |
| Lookout Mountain | Hamilton | E |
| Lowland | Hamblen | E |
| Lupton City | Hamilton | E |
| Madisonville | Monroe | E |
| Mc Donald | Bradley | E |
| Midway | Greene | E |
| Milligan College | Carter | E |
| Mohawk | Greene | E |
| Mooresburg | Hawkins | E |
| Morristown | Hamblen | E |
| Mosheim | Greene | E |
| Mount Carmel | Hawkins | E |
| Mountain City | Johnson | E |
| Mountain Home | Washington | E |
| New Tazewell | Claiborne | E |
| Newcomb | Campbell | E |
| Newport | Cocke | E |
| Niota | McMinn | E |
| Oakdale | Morgan | E |
| Ocoee | Polk | E |
| Old Fort | Polk | E |
| Oliver Springs | Roane | E |
| Oneida | Scott | E |
| Ooltewah | Hamilton | E |
| Parrottsville | Cocke | E |
| Petros | Morgan | E |
| Pikeville | Bledsoe | C |
| Piney Flats | Sullivan | E |
| Pioneer | Campbell | E |
| Pruden | Claiborne | E |
| Reliance | Polk | E |
| Riceville | McMinn | E |
| Roan Mountain | Carter | E |
| Robbins | Scott | E |
| Rogersville | Hawkins | E |
| Rugby | Morgan | E |
| Russellville | Hamblen | E |
| Sale Creek | Hamilton | E |
| Sequatchie | Marion | C |
| Shady Valley | Johnson | E |
| Shawanee | Claiborne | E |
| Signal Mountain | Hamilton | E |
| Sneedville | Hancock | E |
| Soddy-Daisy | Hamilton | E |
| South Pittsburg | Marion | C |
| Speedwell | Claiborne | E |
| Spring City | Rhea | E |
| Sunbright | Morgan | E |
| Surgoinsville | Hawkins | E |
| Sweetwater | Monroe | E |
| Talbott | Hamblen | E |
| Tazewell | Claiborne | E |
| Telford | Washington | E |
| Tellico Plains | Monroe | E |
| Ten Mile | Meigs | E |
| Trade | Johnson | E |
| Turtletown | Polk | E |
| Unicoi | Unicoi | E |
| Vonore | Monroe | E |
| Wartburg | Morgan | E |
| Watauga | Carter | E |
| Whitesburg | Hamblen | E |
| Whiteside | Marion | C |
| Whitwell | Marion | C |
| Winfield | Scott | E |
- Listed above are most places served by USA area code 423. When multiple places in a US state share the same name we list the largest one only. Cities with population over 50,000 are displayed in bold text.
- Multiple time zones. Go to top for current time.