Phone numbers in Dorset, Ohio
Dorset has 3 phone prefixes in area code 440.
Biggest holders: CenturyLink / Lumen, Windstream Western Reserve, AT&T Mobility. This is the local calling area (rate center) where those prefixes were first assigned.
- Mobile carrier 33%
- Local phone company 67%
Every prefix in Dorset
Search the first six digits of a number in this list. If it's here, the number started in Dorset with the carrier shown. If it isn't, check the Ohio page or look the number up.
| Prefix | Carrier | Type | Assigned |
|---|---|---|---|
| 440-837 | CenturyLink / Lumen | Local phone company | 2015 |
| 440-858 | Windstream Western Reserve | Local phone company | – |
| 440-912 | AT&T Mobility | Mobile carrier | 2025 |
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.