Phone numbers in Jacksonville, Illinois
Jacksonville has 25 phone prefixes in area codes 217, 447.
Biggest holders: AT&T Mobility, Frontier, UScellular. This is the local calling area (rate center) where those prefixes were first assigned.
- Mobile carrier 40%
- Local phone company 16%
- Internet / business phone carrier 44%
Every prefix in Jacksonville
Search the first six digits of a number in this list. If it's here, the number started in Jacksonville with the carrier shown. If it isn't, check the Illinois page or look the number up.
| Prefix | Carrier | Type | Assigned |
|---|---|---|---|
| 217-204 | MCImetro (Verizon Business) | Internet / business phone carrier | – |
| 217-243 | Frontier | Local phone company | – |
| 217-245 | Frontier | Local phone company | – |
| 217-248 | UScellular | Mobile carrier | – |
| 217-271 | Mediacom Telephony Of Illinois | Internet / business phone carrier | 2010 |
| 217-291 | Frontier | Local phone company | – |
| 217-320 | AT&T Mobility | Mobile carrier | 2004 |
| 217-370 | AT&T Mobility | Mobile carrier | – |
| 217-371 | AT&T Mobility | Mobile carrier | – |
| 217-408 | Level 3 (Lumen) | Internet / business phone carrier | 2003 |
| 217-461 | Onvoy | Internet / business phone carrier | – |
| 217-473 | AT&T Mobility | Mobile carrier | – |
| 217-479 | Frontier | Local phone company | – |
| 217-490 | UScellular | Mobile carrier | – |
| 217-491 | UScellular | Mobile carrier | – |
| 217-517 | Teleport Communications America | Internet / business phone carrier | 2010 |
| 217-602 | AT&T Mobility | Mobile carrier | – |
| 217-719 | T-Mobile (including Sprint) | Mobile carrier | – |
| 217-831 | UScellular | Mobile carrier | 2001 |
| 217-869 | Nuso | Internet / business phone carrier | – |
| 217-883 | MCImetro (Verizon Business) | Internet / business phone carrier | – |
| 447-260 | Bandwidth | Internet / business phone carrier | 2025 |
| 447-610 | Onvoy | Internet / business phone carrier | 2021 |
| 447-626 | Skyetel | Internet / business phone carrier | 2021 |
| 447-901 | Onvoy | Internet / business phone carrier | 2021 |
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.