Phone numbers in Warren, Ohio
Warren has 46 phone prefixes in area codes 234, 330.
Biggest holders: Brightspeed Of Northwest Ohio, T-Mobile (including Sprint), AT&T Mobility. This is the local calling area (rate center) where those prefixes were first assigned.
- Mobile carrier 39%
- Local phone company 39%
- Internet / business phone carrier 20%
- Paging service 2%
Every prefix in Warren
Search the first six digits of a number in this list. If it's here, the number started in Warren with the carrier shown. If it isn't, check the Ohio page or look the number up.
| Prefix | Carrier | Type | Assigned |
|---|---|---|---|
| 234-223 | T-Mobile (including Sprint) | Mobile carrier | 2011 |
| 234-243 | Vonage America | Internet / business phone carrier | 2018 |
| 234-283 | T-Mobile (including Sprint) | Mobile carrier | 2020 |
| 234-308 | CenturyLink / Lumen | Local phone company | 2013 |
| 234-424 | Onvoy | Internet / business phone carrier | 2024 |
| 234-430 | Bandwidth | Internet / business phone carrier | 2016 |
| 234-451 | AT&T Mobility | Mobile carrier | 2025 |
| 234-600 | Verizon Wireless | Mobile carrier | 2011 |
| 234-699 | Fractel | Internet / business phone carrier | 2020 |
| 234-806 | Charter / Spectrum | Internet / business phone carrier | 2013 |
| 234-830 | AT&T Mobility | Mobile carrier | 2016 |
| 234-926 | Nuso | Internet / business phone carrier | – |
| 330-219 | T-Mobile (including Sprint) | Mobile carrier | – |
| 330-240 | AT&T Mobility | Mobile carrier | 2002 |
| 330-254 | Spok | Paging service | – |
| 330-306 | Brightspeed Of Northwest Ohio | Local phone company | – |
| 330-307 | T-Mobile (including Sprint) | Mobile carrier | – |
| 330-367 | Brightspeed Of Northwest Ohio | Local phone company | – |
| 330-369 | Brightspeed Of Northwest Ohio | Local phone company | – |
| 330-372 | Brightspeed Of Northwest Ohio | Local phone company | – |
| 330-373 | Brightspeed Of Northwest Ohio | Local phone company | – |
| 330-392 | Brightspeed Of Northwest Ohio | Local phone company | – |
| 330-393 | Brightspeed Of Northwest Ohio | Local phone company | – |
| 330-394 | Brightspeed Of Northwest Ohio | Local phone company | – |
| 330-395 | Brightspeed Of Northwest Ohio | Local phone company | – |
| 330-399 | Brightspeed Of Northwest Ohio | Local phone company | – |
| 330-442 | Verizon Wireless | Mobile carrier | – |
| 330-469 | Verizon Wireless | Mobile carrier | 2002 |
| 330-553 | T-Mobile (including Sprint) | Mobile carrier | – |
| 330-609 | Brightspeed Of Northwest Ohio | Local phone company | – |
| 330-646 | AT&T Mobility | Mobile carrier | 2001 |
| 330-647 | AT&T Mobility | Mobile carrier | 2001 |
| 330-675 | Brightspeed Of Northwest Ohio | Local phone company | – |
| 330-766 | T-Mobile (including Sprint) | Mobile carrier | 2002 |
| 330-824 | Brightspeed Of Northwest Ohio | Local phone company | – |
| 330-841 | Brightspeed Of Northwest Ohio | Local phone company | – |
| 330-847 | Brightspeed Of Northwest Ohio | Local phone company | – |
| 330-856 | Brightspeed Of Northwest Ohio | Local phone company | – |
| 330-883 | T-Mobile (including Sprint) | Mobile carrier | 2001 |
| 330-898 | Brightspeed Of Northwest Ohio | Local phone company | – |
| 330-919 | Verizon Wireless | Mobile carrier | 2023 |
| 330-974 | Level 3 (Lumen) | Internet / business phone carrier | 2001 |
| 330-978 | AT&T Mobility | Mobile carrier | 2006 |
| 330-979 | AT&T Mobility | Mobile carrier | 2005 |
| 330-980 | MCImetro (Verizon Business) | Internet / business phone carrier | 2005 |
| 330-984 | Level 3 (Lumen) | Internet / business phone carrier | 2002 |
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.