Phone numbers in New Castle, Pennsylvania
New Castle has 26 phone prefixes in area codes 724, 878.
Biggest holders: Verizon (local phone), T-Mobile (including Sprint), Level 3 (Lumen). This is the local calling area (rate center) where those prefixes were first assigned.
- Mobile carrier 38%
- Local phone company 27%
- Internet / business phone carrier 27%
- Phone company 8%
Every prefix in New Castle
Search the first six digits of a number in this list. If it's here, the number started in New Castle with the carrier shown. If it isn't, check the Pennsylvania page or look the number up.
| Prefix | Carrier | Type | Assigned |
|---|---|---|---|
| 724-202 | Teleport Communications America | Internet / business phone carrier | – |
| 724-333 | T-Mobile (including Sprint) | Mobile carrier | – |
| 724-498 | Level 3 (Lumen) | Internet / business phone carrier | – |
| 724-510 | Level 3 (Lumen) | Internet / business phone carrier | – |
| 724-598 | Verizon (local phone) | Local phone company | – |
| 724-614 | Fidium Enterprise Services | Phone company | – |
| 724-651 | AT&T Mobility | Mobile carrier | – |
| 724-652 | Verizon (local phone) | Local phone company | – |
| 724-654 | Verizon (local phone) | Local phone company | – |
| 724-656 | Verizon (local phone) | Local phone company | – |
| 724-657 | Verizon (local phone) | Local phone company | – |
| 724-658 | Verizon (local phone) | Local phone company | – |
| 724-674 | Verizon Wireless | Mobile carrier | – |
| 724-698 | Core Communications | Internet / business phone carrier | 2001 |
| 724-714 | Verizon (local phone) | Local phone company | – |
| 724-730 | AT&T Mobility | Mobile carrier | – |
| 724-761 | Verizon Wireless | Mobile carrier | – |
| 724-856 | Windstream (PAETEC) | Internet / business phone carrier | – |
| 724-890 | Exiant Communications | Phone company | – |
| 724-923 | AT&T Mobility | Mobile carrier | – |
| 724-936 | T-Mobile (including Sprint) | Mobile carrier | 2017 |
| 724-944 | Verizon Wireless | Mobile carrier | 2002 |
| 724-965 | Level 3 (Lumen) | Internet / business phone carrier | – |
| 724-971 | T-Mobile (including Sprint) | Mobile carrier | – |
| 878-242 | Bandwidth | Internet / business phone carrier | 2021 |
| 878-300 | Boost / Virgin Mobile | Mobile carrier | 2021 |
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.