Published: June 23, 2022
The southern portion of the state of Illinois currently using area code 618 will, starting July 2023, begin using a second area code 730. The new Numbering Plan Area Code 730, approved in 2005 by the Illinois Commerce Commission, will overlay NPA 618 therefore covering the same geographic area which includes these cities: Belleville, East St Louis, Granite City or Mount Vernon.
The dialing plan in the area is now: 10 digits for local calls and 1+10 digits for toll calls. This dialing plan will not change with the creation of the new overlay complex 618/730.
The new area code 730 is scheduled to enter service on July 7, 2023.
See official NANPA announcement and rate center map of the future overlay complex 618/730 (PDF document).
Visit area code 730 page for a list of cities served, map and other info.