Phone numbers in Defiance, Ohio
Defiance has 13 phone prefixes in area code 419.
Biggest holders: Brightspeed Of Northwest Ohio, Verizon Wireless, AT&T Mobility. This is the local calling area (rate center) where those prefixes were first assigned.
- Mobile carrier 54%
- Local phone company 31%
- Internet / business phone carrier 8%
- Phone company 8%
Every prefix in Defiance
Search the first six digits of a number in this list. If it's here, the number started in Defiance with the carrier shown. If it isn't, check the Ohio page or look the number up.
| Prefix | Carrier | Type | Assigned |
|---|---|---|---|
| 419-438 | Verizon Wireless | Mobile carrier | – |
| 419-439 | Verizon Wireless | Mobile carrier | – |
| 419-576 | MetroPCS (T-Mobile) | Mobile carrier | – |
| 419-769 | AT&T Mobility | Mobile carrier | – |
| 419-770 | AT&T Mobility | Mobile carrier | – |
| 419-782 | Brightspeed Of Northwest Ohio | Local phone company | – |
| 419-783 | Brightspeed Of Northwest Ohio | Local phone company | – |
| 419-784 | Brightspeed Of Northwest Ohio | Local phone company | – |
| 419-785 | Brightspeed Of Northwest Ohio | Local phone company | – |
| 419-789 | T-Mobile (including Sprint) | Mobile carrier | – |
| 419-956 | Level 3 (Lumen) | Internet / business phone carrier | 2002 |
| 419-980 | Verizon Wireless | Mobile carrier | 2002 |
| 419-990 | Qualstar Communications | Phone company | 2001 |
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.