Phone numbers in Mount Joy, Pennsylvania
Mount Joy has 6 phone prefixes in area codes 223, 717.
Biggest holders: T-Mobile (including Sprint), Brightspeed Of Pennsylvania, Onvoy. This is the local calling area (rate center) where those prefixes were first assigned.
- Mobile carrier 33%
- Local phone company 50%
- Internet / business phone carrier 17%
Every prefix in Mount Joy
Search the first six digits of a number in this list. If it's here, the number started in Mount Joy with the carrier shown. If it isn't, check the Pennsylvania page or look the number up.
| Prefix | Carrier | Type | Assigned |
|---|---|---|---|
| 223-215 | T-Mobile (including Sprint) | Mobile carrier | 2018 |
| 223-295 | Onvoy | Internet / business phone carrier | 2022 |
| 223-349 | T-Mobile (including Sprint) | Mobile carrier | 2023 |
| 717-492 | Brightspeed Of Pennsylvania | Local phone company | – |
| 717-653 | Brightspeed Of Pennsylvania | Local phone company | – |
| 717-928 | Windstream D & E Systems | 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.