Phone numbers in Fairfield, Pennsylvania
Fairfield has 4 phone prefixes in area codes 223, 717.
Biggest holders: Core Communications, Comcast, Brightspeed Of Pennsylvania. This is the local calling area (rate center) where those prefixes were first assigned.
- Local phone company 25%
- Internet / business phone carrier 75%
Every prefix in Fairfield
Search the first six digits of a number in this list. If it's here, the number started in Fairfield with the carrier shown. If it isn't, check the Pennsylvania page or look the number up.
| Prefix | Carrier | Type | Assigned |
|---|---|---|---|
| 223-924 | Core Communications | Internet / business phone carrier | 2019 |
| 717-408 | Core Communications | Internet / business phone carrier | 2009 |
| 717-457 | Comcast | Internet / business phone carrier | 2007 |
| 717-642 | Brightspeed Of Pennsylvania | Local phone company | – |
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.