Phone numbers in Galesburg, Illinois
Galesburg has 20 phone prefixes in area code 309.
Biggest holders: Brightspeed Of Illinois, UScellular, Verizon Wireless. This is the local calling area (rate center) where those prefixes were first assigned.
- Mobile carrier 45%
- Local phone company 30%
- Internet / business phone carrier 20%
- Phone company 5%
Every prefix in Galesburg
Search the first six digits of a number in this list. If it's here, the number started in Galesburg with the carrier shown. If it isn't, check the Illinois page or look the number up.
| Prefix | Carrier | Type | Assigned |
|---|---|---|---|
| 309-221 | UScellular | Mobile carrier | – |
| 309-297 | Skyetel | Internet / business phone carrier | – |
| 309-299 | T-Mobile (including Sprint) | Mobile carrier | – |
| 309-315 | CenturyLink / Lumen | Local phone company | 2014 |
| 309-335 | Verizon Wireless | Mobile carrier | – |
| 309-337 | UScellular | Mobile carrier | – |
| 309-341 | Brightspeed Of Illinois | Local phone company | – |
| 309-342 | Brightspeed Of Illinois | Local phone company | – |
| 309-343 | Brightspeed Of Illinois | Local phone company | – |
| 309-344 | Brightspeed Of Illinois | Local phone company | – |
| 309-345 | Brightspeed Of Illinois | Local phone company | – |
| 309-351 | Verizon Wireless | Mobile carrier | – |
| 309-368 | Verizon Wireless | Mobile carrier | – |
| 309-371 | UScellular | Mobile carrier | – |
| 309-381 | Vonage America | Internet / business phone carrier | 2019 |
| 309-509 | Verizon Wireless | Mobile carrier | 2004 |
| 309-541 | Onvoy | Internet / business phone carrier | 2015 |
| 309-549 | Telnyx | Internet / business phone carrier | 2019 |
| 309-719 | Stratus Networks | Phone company | 2020 |
| 309-973 | UScellular | Mobile carrier | – |
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.