Phone numbers in Freeport, Illinois
Freeport has 30 phone prefixes in area codes 779, 815.
Biggest holders: UScellular, Frontier, Verizon Wireless. This is the local calling area (rate center) where those prefixes were first assigned.
- Mobile carrier 63%
- Local phone company 20%
- Internet / business phone carrier 13%
- Phone company 3%
Every prefix in Freeport
Search the first six digits of a number in this list. If it's here, the number started in Freeport with the carrier shown. If it isn't, check the Illinois page or look the number up.
| Prefix | Carrier | Type | Assigned |
|---|---|---|---|
| 779-413 | UScellular | Mobile carrier | 2025 |
| 779-414 | UScellular | Mobile carrier | 2025 |
| 779-415 | UScellular | Mobile carrier | 2025 |
| 779-416 | UScellular | Mobile carrier | 2025 |
| 779-417 | UScellular | Mobile carrier | 2025 |
| 779-418 | UScellular | Mobile carrier | 2025 |
| 779-419 | UScellular | Mobile carrier | 2025 |
| 779-420 | UScellular | Mobile carrier | 2025 |
| 779-421 | UScellular | Mobile carrier | 2025 |
| 779-499 | Skyetel | Internet / business phone carrier | 2021 |
| 779-677 | Fractel | Internet / business phone carrier | 2020 |
| 779-904 | Onvoy | Internet / business phone carrier | 2021 |
| 815-232 | Frontier | Local phone company | – |
| 815-233 | Frontier | Local phone company | – |
| 815-235 | Frontier | Local phone company | – |
| 815-238 | Verizon Wireless | Mobile carrier | – |
| 815-266 | Frontier | Local phone company | – |
| 815-275 | Verizon Wireless | Mobile carrier | – |
| 815-291 | UScellular | Mobile carrier | – |
| 815-297 | Frontier | Local phone company | – |
| 815-541 | UScellular | Mobile carrier | – |
| 815-599 | Frontier | Local phone company | – |
| 815-616 | T-Mobile (including Sprint) | Mobile carrier | 2004 |
| 815-618 | AT&T Mobility | Mobile carrier | 2006 |
| 815-650 | MetroPCS (T-Mobile) | Mobile carrier | – |
| 815-656 | Level 3 (Lumen) | Internet / business phone carrier | 2002 |
| 815-801 | Aero North Communications | Phone company | – |
| 815-821 | UScellular | Mobile carrier | 2001 |
| 815-908 | Verizon Wireless | Mobile carrier | – |
| 815-990 | Verizon Wireless | Mobile carrier | 2002 |
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.