Phone numbers in Sunnyland, Illinois
Sunnyland has 4 phone prefixes in area code 309.
Biggest holders: Frontier, Onvoy, Level 3 (Lumen). This is the local calling area (rate center) where those prefixes were first assigned.
- Local phone company 50%
- Internet / business phone carrier 50%
Every prefix in Sunnyland
Search the first six digits of a number in this list. If it's here, the number started in Sunnyland with the carrier shown. If it isn't, check the Illinois page or look the number up.
| Prefix | Carrier | Type | Assigned |
|---|---|---|---|
| 309-505 | Onvoy | Internet / business phone carrier | 2003 |
| 309-717 | Level 3 (Lumen) | Internet / business phone carrier | 2002 |
| 309-745 | Frontier | Local phone company | – |
| 309-819 | Frontier | Local phone company | 2001 |
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.