Area Code 621
Area code 621 is in Texas, USA , spanning 8 counties and serving 56 cities, including Houston, Friendswood or Rosenberg.
In service since January 23, 2025, area code 621 is an overlay Numbering Plan Area, part of overlay complex 713/281/832/346/621.
The current local time is .
For exact NPA boundaries see official 621 area code map
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Cities in area code 621
| City1 | County | Time Zone2 |
|---|---|---|
| Alief | Harris | C |
| Alvin | Brazoria | C |
| Bacliff | Galveston | C |
| Barker | Harris | C |
| Baytown | Harris | C |
| Bellaire | Harris | C |
| Brookshire | Waller | C |
| Channelview | Harris | C |
| Cleveland | Liberty | C |
| Crosby | Harris | C |
| Cypress | Harris | C |
| Deer Park | Harris | C |
| Dickinson | Galveston | C |
| Fresno | Fort Bend | C |
| Friendswood | Galveston | C |
| Fulshear | Fort Bend | C |
| Galena Park | Harris | C |
| Highlands | Harris | C |
| Houston | Harris | C |
| Huffman | Harris | C |
| Hufsmith | Harris | C |
| Humble | Harris | C |
| Katy | Fort Bend | C |
| Kemah | Galveston | C |
| Kingwood | Harris | C |
| La Porte | Harris | C |
| League City | Galveston | C |
| Liverpool | Brazoria | C |
| Magnolia | Montgomery | C |
| Manvel | Brazoria | C |
| Missouri City | Fort Bend | C |
| Mont Belvieu | Chambers | C |
| Needville | Fort Bend | C |
| New Caney | Montgomery | C |
| North Houston | Harris | C |
| Pasadena | Harris | C |
| Pattison | Waller | C |
| Pearland | Brazoria | C |
| Pinehurst | Montgomery | C |
| Porter | Montgomery | C |
| Richmond | Fort Bend | C |
| Romayor | Liberty | C |
| Rosenberg | Fort Bend | C |
| Rosharon | Brazoria | C |
| Rye | Liberty | C |
| Seabrook | Harris | C |
| Simonton | Fort Bend | C |
| South Houston | Harris | C |
| Splendora | Montgomery | C |
| Spring | Harris | C |
| Stafford | Fort Bend | C |
| Sugar Land | Fort Bend | C |
| The Woodlands | Montgomery | C |
| Thompsons | Fort Bend | C |
| Tomball | Harris | C |
| Webster | Harris | C |
- Listed above are most places served by USA area code 621. 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.
- C stands for Central Time (currently ).