Phone numbers in Mason, Ohio
Mason has 23 phone prefixes in area codes 283, 513.
Biggest holders: Brightspeed Of Northwest Ohio, Onvoy, Level 3 (Lumen). This is the local calling area (rate center) where those prefixes were first assigned.
- Local phone company 48%
- Internet / business phone carrier 52%
Every prefix in Mason
Search the first six digits of a number in this list. If it's here, the number started in Mason with the carrier shown. If it isn't, check the Ohio page or look the number up.
| Prefix | Carrier | Type | Assigned |
|---|---|---|---|
| 283-210 | Nuso | Internet / business phone carrier | 2023 |
| 283-236 | Onvoy | Internet / business phone carrier | 2026 |
| 513-204 | Cincinnati Bell Extended Territories | Local phone company | 2003 |
| 513-229 | Cincinnati Bell Extended Territories | Local phone company | – |
| 513-234 | MCImetro (Verizon Business) | Internet / business phone carrier | – |
| 513-336 | Brightspeed Of Northwest Ohio | Local phone company | – |
| 513-339 | Brightspeed Of Northwest Ohio | Local phone company | – |
| 513-398 | Brightspeed Of Northwest Ohio | Local phone company | – |
| 513-445 | Level 3 (Lumen) | Internet / business phone carrier | 2005 |
| 513-459 | Brightspeed Of Northwest Ohio | Local phone company | – |
| 513-466 | Onvoy | Internet / business phone carrier | 2016 |
| 513-486 | CenturyLink / Lumen | Local phone company | 2013 |
| 513-492 | Level 3 (Lumen) | Internet / business phone carrier | – |
| 513-548 | Bandwidth | Internet / business phone carrier | 2018 |
| 513-573 | Brightspeed Of Northwest Ohio | Local phone company | – |
| 513-622 | Brightspeed Of Northwest Ohio | Local phone company | – |
| 513-637 | Onvoy | Internet / business phone carrier | 2022 |
| 513-701 | Level 3 (Lumen) | Internet / business phone carrier | – |
| 513-754 | Brightspeed Of Northwest Ohio | Local phone company | – |
| 513-770 | Cincinnati Bell Extended Territories | Local phone company | – |
| 513-848 | Onvoy | Internet / business phone carrier | 2021 |
| 513-972 | Level 3 (Lumen) | Internet / business phone carrier | 2012 |
| 513-994 | Onvoy | Internet / business phone carrier | 2023 |
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.