Phone numbers in Shafter, California
Shafter has 8 phone prefixes in area code 661.
Biggest holders: T-Mobile (including Sprint), Bandwidth, Onvoy. This is the local calling area (rate center) where those prefixes were first assigned.
- Mobile carrier 38%
- Local phone company 12%
- Internet / business phone carrier 50%
Every prefix in Shafter
Search the first six digits of a number in this list. If it's here, the number started in Shafter with the carrier shown. If it isn't, check the California page or look the number up.
| Prefix | Carrier | Type | Assigned |
|---|---|---|---|
| 661-237 | Bandwidth | Internet / business phone carrier | – |
| 661-292 | T-Mobile (including Sprint) | Mobile carrier | 2002 |
| 661-459 | Onvoy | Internet / business phone carrier | – |
| 661-594 | T-Mobile (including Sprint) | Mobile carrier | 2022 |
| 661-630 | Bhn IP Enabled Services | Internet / business phone carrier | – |
| 661-746 | AT&T (local phone) | Local phone company | – |
| 661-776 | Level 3 (Lumen) | Internet / business phone carrier | – |
| 661-910 | AT&T Mobility | Mobile carrier | – |
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.