Phone numbers in Charleston, Illinois
Charleston has 28 phone prefixes in area codes 217, 447.
Biggest holders: AT&T Mobility, Illinois Consolidated Tel, T-Mobile (including Sprint). This is the local calling area (rate center) where those prefixes were first assigned.
- Mobile carrier 82%
- Internet / business phone carrier 4%
- Phone company 14%
Every prefix in Charleston
Search the first six digits of a number in this list. If it's here, the number started in Charleston with the carrier shown. If it isn't, check the Illinois page or look the number up.
| Prefix | Carrier | Type | Assigned |
|---|---|---|---|
| 217-208 | Verizon Wireless | Mobile carrier | – |
| 217-218 | AT&T Mobility | Mobile carrier | 2004 |
| 217-345 | Illinois Consolidated Tel | Phone company | – |
| 217-348 | Illinois Consolidated Tel | Phone company | – |
| 217-389 | AT&T Mobility | Mobile carrier | 2024 |
| 217-508 | AT&T Mobility | Mobile carrier | 2005 |
| 217-512 | T-Mobile (including Sprint) | Mobile carrier | – |
| 217-549 | Verizon Wireless | Mobile carrier | – |
| 217-581 | Illinois Consolidated Tel | Phone company | – |
| 217-639 | Illinois Consolidated Tel | Phone company | – |
| 217-758 | AT&T Mobility | Mobile carrier | 2024 |
| 217-790 | T-Mobile (including Sprint) | Mobile carrier | 2017 |
| 447-219 | T-Mobile (including Sprint) | Mobile carrier | 2021 |
| 447-250 | AT&T Mobility | Mobile carrier | 2023 |
| 447-256 | AT&T Mobility | Mobile carrier | 2023 |
| 447-275 | AT&T Mobility | Mobile carrier | 2023 |
| 447-282 | AT&T Mobility | Mobile carrier | 2023 |
| 447-286 | AT&T Mobility | Mobile carrier | 2024 |
| 447-288 | Onvoy | Internet / business phone carrier | 2024 |
| 447-303 | AT&T Mobility | Mobile carrier | 2024 |
| 447-308 | AT&T Mobility | Mobile carrier | 2025 |
| 447-313 | AT&T Mobility | Mobile carrier | 2025 |
| 447-325 | AT&T Mobility | Mobile carrier | 2025 |
| 447-326 | AT&T Mobility | Mobile carrier | 2025 |
| 447-327 | AT&T Mobility | Mobile carrier | 2025 |
| 447-328 | AT&T Mobility | Mobile carrier | 2025 |
| 447-329 | AT&T Mobility | Mobile carrier | 2025 |
| 447-334 | AT&T Mobility | Mobile carrier | 2026 |
Most prefixes are pooled: the 10,000 numbers in each are handed out in blocks of 1,000 to different carriers, and people can also take their numbers to another carrier. So the carrier shown is where the prefix started, not a guarantee about any one number. Source: NANPA central office code records, 2026-10-10.