Phone numbers in Clarksburg, West Virginia
Clarksburg has 34 phone prefixes in area codes 304, 681.
Biggest holders: Frontier, AT&T Mobility, MetroPCS (T-Mobile). This is the local calling area (rate center) where those prefixes were first assigned.
- Mobile carrier 35%
- Local phone company 21%
- Internet / business phone carrier 26%
- Phone company 18%
Every prefix in Clarksburg
Search the first six digits of a number in this list. If it's here, the number started in Clarksburg with the carrier shown. If it isn't, check the West Virginia page or look the number up.
| Prefix | Carrier | Type | Assigned |
|---|---|---|---|
| 304-203 | AT&T Mobility | Mobile carrier | – |
| 304-300 | Ymax Communications | Phone company | 2008 |
| 304-326 | Fibernet | Internet / business phone carrier | – |
| 304-423 | Citynet West Virginia | Phone company | 2003 |
| 304-476 | AT&T Mobility | Mobile carrier | 2001 |
| 304-566 | AT&T Mobility | Mobile carrier | – |
| 304-622 | Frontier | Local phone company | – |
| 304-623 | Frontier | Local phone company | – |
| 304-624 | Frontier | Local phone company | – |
| 304-625 | Frontier | Local phone company | – |
| 304-626 | Frontier | Local phone company | – |
| 304-627 | Frontier | Local phone company | – |
| 304-629 | MetroPCS (T-Mobile) | Mobile carrier | – |
| 304-631 | Ram Technologies | Phone company | – |
| 304-641 | AT&T Mobility | Mobile carrier | – |
| 304-669 | UScellular | Mobile carrier | – |
| 304-672 | UScellular | Mobile carrier | – |
| 304-677 | UScellular | Mobile carrier | – |
| 304-695 | MetroPCS (T-Mobile) | Mobile carrier | – |
| 304-709 | Citynet West Virginia | Phone company | 2005 |
| 304-715 | Stratuswave Comm LLC Wv | Phone company | – |
| 304-838 | MetroPCS (T-Mobile) | Mobile carrier | – |
| 304-841 | Level 3 (Lumen) | Internet / business phone carrier | – |
| 304-844 | T-Mobile (including Sprint) | Mobile carrier | 2001 |
| 304-918 | Bandwidth | Internet / business phone carrier | 2008 |
| 304-931 | Level 3 (Lumen) | Internet / business phone carrier | 2002 |
| 304-969 | Lumos Networks | Phone company | 2007 |
| 681-455 | Vonage America | Internet / business phone carrier | 2018 |
| 681-600 | Onvoy | Internet / business phone carrier | 2018 |
| 681-602 | AT&T Mobility | Mobile carrier | 2026 |
| 681-610 | Onvoy | Internet / business phone carrier | 2021 |
| 681-622 | Frontier | Local phone company | 2012 |
| 681-810 | Onvoy | Internet / business phone carrier | 2019 |
| 681-896 | Twilio | Internet / business phone carrier | 2022 |
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.