Phone numbers in Mentor, Ohio
Mentor has 14 phone prefixes in area code 440.
Biggest holders: AT&T (local phone), Level 3 (Lumen), MCImetro (Verizon Business). This is the local calling area (rate center) where those prefixes were first assigned.
- Local phone company 43%
- Internet / business phone carrier 57%
Every prefix in Mentor
Search the first six digits of a number in this list. If it's here, the number started in Mentor with the carrier shown. If it isn't, check the Ohio page or look the number up.
| Prefix | Carrier | Type | Assigned |
|---|---|---|---|
| 440-205 | AT&T (local phone) | Local phone company | – |
| 440-209 | AT&T (local phone) | Local phone company | – |
| 440-255 | AT&T (local phone) | Local phone company | – |
| 440-257 | AT&T (local phone) | Local phone company | – |
| 440-266 | AT&T (local phone) | Local phone company | – |
| 440-290 | Level 3 (Lumen) | Internet / business phone carrier | – |
| 440-299 | Level 3 (Lumen) | Internet / business phone carrier | – |
| 440-368 | Level 3 (Lumen) | Internet / business phone carrier | – |
| 440-445 | MCImetro (Verizon Business) | Internet / business phone carrier | – |
| 440-534 | Level 3 (Lumen) | Internet / business phone carrier | – |
| 440-578 | MCImetro (Verizon Business) | Internet / business phone carrier | – |
| 440-701 | Teleport Communications America | Internet / business phone carrier | – |
| 440-890 | Onvoy | Internet / business phone carrier | 2021 |
| 440-974 | AT&T (local phone) | 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.