Phone numbers in Superior, Arizona
Superior has 7 phone prefixes in area code 520.
Biggest holders: Onvoy, Allstream, Fractel. This is the local calling area (rate center) where those prefixes were first assigned.
- Mobile carrier 14%
- Local phone company 14%
- Internet / business phone carrier 71%
Every prefix in Superior
Search the first six digits of a number in this list. If it's here, the number started in Superior with the carrier shown. If it isn't, check the Arizona page or look the number up.
| Prefix | Carrier | Type | Assigned |
|---|---|---|---|
| 520-391 | Allstream | Internet / business phone carrier | – |
| 520-580 | Onvoy | Internet / business phone carrier | 2021 |
| 520-597 | Onvoy | Internet / business phone carrier | 2016 |
| 520-655 | Fractel | Internet / business phone carrier | 2020 |
| 520-689 | CenturyLink / Lumen | Local phone company | – |
| 520-772 | TON80 Communications | Internet / business phone carrier | 2022 |
| 520-827 | 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.