Area code 618
Area code 618 is a telephone area code in the North American Numbering Plan (NANP) for southern Illinois. Some of the main cities in the numbering plan area include Carbondale, Cairo, Belleville, East St. Louis, Edwardsville, Marion, O'Fallon, Alton, Mt. Vernon, Centralia, Herrin, Salem, Metropolis, Fairview Heights, Collinsville, and Granite City
Area code 618 was among the original North American area codes created in 1947. In 1954, most of Metro East switched from 217 to 618.
618 is the only one of Illinois' four original area codes that were never split or overlaid. According to projections in 2021, 618 is expected to "exhaust" by 2025.[1]
Periodic proposals have been made for relief of the 618 area code. The most recent proposal has 618 overlaid with the unactivated 730. For now, nationwide number pooling is in effect.
Prior to October 2021, area code 618 had telephone numbers assigned for the central office code 988. In 2020, 988 was designated nationwide as a dialing code for the National Suicide Prevention Lifeline, which created a conflict for exchanges that permit seven-digit dialing. This area code was therefore scheduled to transition to ten-digit dialing by October 24, 2021.[2]
Cities in the 618 area code
External links
| North: 217 | ||
| West: 314, 636, 573 | Area code 618 | East: 812 |
| South: 573, 270 | ||
| Missouri area codes: 314, 417, 573, 636, 660, 816 | ||
| Kentucky area codes: 270/364, 502, 606, 859 | ||
| Indiana area codes: 219, 260, 317/463, 574, 765, 812/930 | ||
References
- "Archived copy" (PDF). Archived (PDF) from the original on 2021-10-18. Retrieved 2021-10-18.
{{cite web}}: CS1 maint: archived copy as title (link) - "Transition to 10-digit dialing (for 988 as 3-digit access to National Suicide Prevention Hotline)" (PDF). North American Numbering Plan Administrator. January 8, 2021. Retrieved March 9, 2021.