Phone numbers in Franklin, Ohio
Franklin has 11 phone prefixes in area codes 326, 937.
Biggest holders: AT&T (local phone), Level 3 (Lumen), Onvoy. This is the local calling area (rate center) where those prefixes were first assigned.
- Mobile carrier 18%
- Local phone company 36%
- Internet / business phone carrier 45%
Every prefix in Franklin
Search the first six digits of a number in this list. If it's here, the number started in Franklin with the carrier shown. If it isn't, check the Ohio page or look the number up.
| Prefix | Carrier | Type | Assigned |
|---|---|---|---|
| 326-214 | Onvoy | Internet / business phone carrier | 2023 |
| 326-243 | AT&T Mobility | Mobile carrier | 2025 |
| 937-514 | MCImetro (Verizon Business) | Internet / business phone carrier | – |
| 937-550 | Level 3 (Lumen) | Internet / business phone carrier | 2002 |
| 937-557 | Level 3 (Lumen) | Internet / business phone carrier | 2002 |
| 937-704 | AT&T (local phone) | Local phone company | – |
| 937-743 | AT&T (local phone) | Local phone company | – |
| 937-746 | AT&T (local phone) | Local phone company | – |
| 937-748 | AT&T (local phone) | Local phone company | – |
| 937-790 | T-Mobile (including Sprint) | Mobile carrier | 2001 |
| 937-806 | Windstream (PAETEC) | Internet / business phone carrier | 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.