Phone numbers in Washington, Pennsylvania
Washington has 42 phone prefixes in area codes 412, 724, 878.
Biggest holders: Verizon Wireless, AT&T Mobility, Verizon (local phone). This is the local calling area (rate center) where those prefixes were first assigned.
- Mobile carrier 50%
- Local phone company 14%
- Internet / business phone carrier 29%
- Phone company 7%
Every prefix in Washington
Search the first six digits of a number in this list. If it's here, the number started in Washington with the carrier shown. If it isn't, check the Pennsylvania page or look the number up.
| Prefix | Carrier | Type | Assigned |
|---|---|---|---|
| 412-217 | AT&T Mobility | Mobile carrier | – |
| 412-296 | T-Mobile (including Sprint) | Mobile carrier | – |
| 412-994 | Verizon Wireless | Mobile carrier | – |
| 412-997 | Verizon Wireless | Mobile carrier | – |
| 724-206 | Teleport Communications America | Internet / business phone carrier | – |
| 724-207 | Level 3 (Lumen) | Internet / business phone carrier | – |
| 724-222 | Verizon (local phone) | Local phone company | – |
| 724-223 | Verizon (local phone) | Local phone company | – |
| 724-225 | Verizon (local phone) | Local phone company | – |
| 724-228 | Verizon (local phone) | Local phone company | – |
| 724-229 | Verizon (local phone) | Local phone company | – |
| 724-249 | Core Communications | Internet / business phone carrier | 2001 |
| 724-250 | Verizon (local phone) | Local phone company | – |
| 724-255 | Verizon Wireless | Mobile carrier | – |
| 724-263 | AT&T Mobility | Mobile carrier | – |
| 724-288 | MCImetro (Verizon Business) | Internet / business phone carrier | – |
| 724-328 | AT&T Mobility | Mobile carrier | 2001 |
| 724-344 | Verizon Wireless | Mobile carrier | – |
| 724-350 | T-Mobile (including Sprint) | Mobile carrier | – |
| 724-413 | T-Mobile (including Sprint) | Mobile carrier | – |
| 724-470 | Level 3 (Lumen) | Internet / business phone carrier | – |
| 724-503 | Windstream (PAETEC) | Internet / business phone carrier | – |
| 724-531 | AT&T Mobility | Mobile carrier | 2001 |
| 724-554 | AT&T Mobility | Mobile carrier | – |
| 724-579 | Fidium Enterprise Services | Phone company | – |
| 724-678 | Verizon Wireless | Mobile carrier | 2006 |
| 724-705 | Level 3 (Lumen) | Internet / business phone carrier | – |
| 724-747 | Verizon Wireless | Mobile carrier | – |
| 724-809 | Fidium Enterprise Services | Phone company | 2001 |
| 724-825 | Level 3 (Lumen) | Internet / business phone carrier | – |
| 724-884 | Windstream (PAETEC) | Internet / business phone carrier | – |
| 724-914 | Verizon Wireless | Mobile carrier | 2003 |
| 724-986 | Verizon Wireless | Mobile carrier | 2002 |
| 724-993 | Htc Communications | Phone company | – |
| 878-212 | Verizon Wireless | Mobile carrier | 2017 |
| 878-218 | Verizon Wireless | Mobile carrier | 2015 |
| 878-226 | Onvoy | Internet / business phone carrier | 2021 |
| 878-229 | Verizon Wireless | Mobile carrier | 2020 |
| 878-243 | Telnyx | Internet / business phone carrier | 2021 |
| 878-297 | AT&T Mobility | Mobile carrier | 2025 |
| 878-545 | Verizon Wireless | Mobile carrier | 2026 |
| 878-880 | Onvoy | Internet / business phone carrier | 2020 |
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.