Phone numbers in Cambridge, Ohio
Cambridge has 14 phone prefixes in area code 740.
Biggest holders: T-Mobile (including Sprint), Verizon Wireless, Frontier. This is the local calling area (rate center) where those prefixes were first assigned.
- Mobile carrier 57%
- Local phone company 21%
- Internet / business phone carrier 14%
- Phone company 7%
Every prefix in Cambridge
Search the first six digits of a number in this list. If it's here, the number started in Cambridge with the carrier shown. If it isn't, check the Ohio page or look the number up.
| Prefix | Carrier | Type | Assigned |
|---|---|---|---|
| 740-255 | T-Mobile (including Sprint) | Mobile carrier | – |
| 740-260 | Verizon Wireless | Mobile carrier | 2002 |
| 740-421 | Level 3 (Lumen) | Internet / business phone carrier | 2002 |
| 740-432 | Frontier | Local phone company | – |
| 740-435 | Frontier | Local phone company | – |
| 740-439 | Frontier | Local phone company | – |
| 740-584 | AT&T Mobility | Mobile carrier | – |
| 740-630 | Level 3 (Lumen) | Internet / business phone carrier | 2001 |
| 740-680 | AT&T Mobility | Mobile carrier | – |
| 740-705 | T-Mobile (including Sprint) | Mobile carrier | – |
| 740-781 | Horizon Services | Phone company | 2012 |
| 740-801 | Verizon Wireless | Mobile carrier | 2005 |
| 740-825 | T-Mobile (including Sprint) | Mobile carrier | 2006 |
| 740-995 | Verizon Wireless | 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.