Phone numbers in Effingham, Illinois
Effingham has 12 phone prefixes in area codes 217, 447.
Biggest holders: Illinois Consolidated Tel, Verizon Wireless, AT&T Mobility. This is the local calling area (rate center) where those prefixes were first assigned.
- Mobile carrier 58%
- Internet / business phone carrier 8%
- Phone company 33%
Every prefix in Effingham
Search the first six digits of a number in this list. If it's here, the number started in Effingham with the carrier shown. If it isn't, check the Illinois page or look the number up.
| Prefix | Carrier | Type | Assigned |
|---|---|---|---|
| 217-240 | T-Mobile (including Sprint) | Mobile carrier | – |
| 217-342 | Illinois Consolidated Tel | Phone company | – |
| 217-343 | AT&T Mobility | Mobile carrier | – |
| 217-347 | Illinois Consolidated Tel | Phone company | – |
| 217-500 | Verizon Wireless | Mobile carrier | 2018 |
| 217-540 | Illinois Consolidated Tel | Phone company | – |
| 217-663 | MetroPCS (T-Mobile) | Mobile carrier | – |
| 217-690 | AT&T Mobility | Mobile carrier | – |
| 217-708 | Wabash Comm | Phone company | 2019 |
| 217-821 | Verizon Wireless | Mobile carrier | – |
| 217-994 | Verizon Wireless | Mobile carrier | – |
| 447-290 | Onvoy | Internet / business phone carrier | 2024 |
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.