Phone numbers in Northfield, Ohio
Northfield has 11 phone prefixes in area codes 234, 330.
Biggest holders: Windstream Western Reserve, Onvoy, Charter / Spectrum. This is the local calling area (rate center) where those prefixes were first assigned.
- Local phone company 55%
- Internet / business phone carrier 45%
Every prefix in Northfield
Search the first six digits of a number in this list. If it's here, the number started in Northfield with the carrier shown. If it isn't, check the Ohio page or look the number up.
| Prefix | Carrier | Type | Assigned |
|---|---|---|---|
| 234-534 | Onvoy | Internet / business phone carrier | 2024 |
| 234-704 | Onvoy | Internet / business phone carrier | 2013 |
| 234-710 | Onvoy | Internet / business phone carrier | 2019 |
| 234-808 | Charter / Spectrum | Internet / business phone carrier | 2013 |
| 330-463 | Windstream Western Reserve | Local phone company | – |
| 330-467 | Windstream Western Reserve | Local phone company | – |
| 330-468 | Windstream Western Reserve | Local phone company | – |
| 330-528 | Windstream Western Reserve | Local phone company | – |
| 330-656 | Windstream Western Reserve | Local phone company | – |
| 330-748 | MCImetro (Verizon Business) | Internet / business phone carrier | 2006 |
| 330-908 | Windstream Western Reserve | Local phone company | – |
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.