Phone numbers in Princeton, Illinois
Princeton has 11 phone prefixes in area codes 779, 815.
Biggest holders: Frontier, AT&T Mobility, Verizon Wireless. This is the local calling area (rate center) where those prefixes were first assigned.
- Mobile carrier 55%
- Local phone company 36%
- Internet / business phone carrier 9%
Every prefix in Princeton
Search the first six digits of a number in this list. If it's here, the number started in Princeton with the carrier shown. If it isn't, check the Illinois page or look the number up.
| Prefix | Carrier | Type | Assigned |
|---|---|---|---|
| 779-239 | AT&T Mobility | Mobile carrier | 2016 |
| 779-386 | T-Mobile (including Sprint) | Mobile carrier | 2024 |
| 815-303 | Verizon Wireless | Mobile carrier | – |
| 815-719 | MetroPCS (T-Mobile) | Mobile carrier | 2002 |
| 815-866 | Verizon Wireless | Mobile carrier | – |
| 815-872 | Frontier | Local phone company | – |
| 815-875 | Frontier | Local phone company | – |
| 815-876 | Frontier | Local phone company | – |
| 815-878 | AT&T Mobility | Mobile carrier | – |
| 815-879 | Frontier | Local phone company | – |
| 815-915 | Level 3 (Lumen) | Internet / business phone carrier | 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.