Phone numbers in Flagstaff, Arizona
Flagstaff has 64 phone prefixes in area codes 520, 928.
Biggest holders: CenturyLink / Lumen, Onvoy, Verizon Wireless. This is the local calling area (rate center) where those prefixes were first assigned.
- Mobile carrier 33%
- Local phone company 30%
- Internet / business phone carrier 36%
- Phone company 2%
Every prefix in Flagstaff
Search the first six digits of a number in this list. If it's here, the number started in Flagstaff with the carrier shown. If it isn't, check the Arizona page or look the number up.
| Prefix | Carrier | Type | Assigned |
|---|---|---|---|
| 520-491 | T-Mobile (including Sprint) | Mobile carrier | – |
| 928-213 | CenturyLink / Lumen | Local phone company | – |
| 928-214 | CenturyLink / Lumen | Local phone company | – |
| 928-220 | MetroPCS (T-Mobile) | Mobile carrier | – |
| 928-221 | AT&T Mobility | Mobile carrier | – |
| 928-222 | Onvoy | Internet / business phone carrier | – |
| 928-223 | Onvoy | Internet / business phone carrier | – |
| 928-225 | T-Mobile (including Sprint) | Mobile carrier | 2002 |
| 928-226 | CenturyLink / Lumen | Local phone company | – |
| 928-233 | Allstream | Internet / business phone carrier | – |
| 928-255 | Level 3 (Lumen) | Internet / business phone carrier | – |
| 928-266 | Csc Voice | Internet / business phone carrier | – |
| 928-268 | Onvoy | Internet / business phone carrier | – |
| 928-286 | CenturyLink / Lumen | Local phone company | – |
| 928-310 | T-Mobile (including Sprint) | Mobile carrier | 2004 |
| 928-326 | Cellular One Of Ne Arizona | Mobile carrier | 2016 |
| 928-380 | AT&T Mobility | Mobile carrier | – |
| 928-395 | Onvoy | Internet / business phone carrier | – |
| 928-396 | Onvoy | Internet / business phone carrier | – |
| 928-405 | AT&T Mobility | Mobile carrier | 2021 |
| 928-419 | Csc Wireless | Mobile carrier | 2019 |
| 928-423 | Level 3 (Lumen) | Internet / business phone carrier | 2021 |
| 928-433 | Allstream | Internet / business phone carrier | – |
| 928-438 | Onvoy | Internet / business phone carrier | 2001 |
| 928-440 | Csc Voice | Internet / business phone carrier | 2013 |
| 928-447 | Onvoy | Internet / business phone carrier | – |
| 928-456 | Commio | Internet / business phone carrier | 2021 |
| 928-522 | CenturyLink / Lumen | Local phone company | – |
| 928-523 | CenturyLink / Lumen | Local phone company | – |
| 928-525 | CenturyLink / Lumen | Local phone company | – |
| 928-526 | CenturyLink / Lumen | Local phone company | – |
| 928-527 | CenturyLink / Lumen | Local phone company | – |
| 928-547 | Verizon Wireless | Mobile carrier | 2024 |
| 928-549 | Verizon Wireless | Mobile carrier | 2025 |
| 928-556 | CenturyLink / Lumen | Local phone company | – |
| 928-563 | Onvoy | Internet / business phone carrier | – |
| 928-569 | Onvoy | Internet / business phone carrier | – |
| 928-600 | T-Mobile (including Sprint) | Mobile carrier | – |
| 928-606 | Verizon Wireless | Mobile carrier | – |
| 928-607 | Verizon Wireless | Mobile carrier | – |
| 928-622 | TON80 Communications | Internet / business phone carrier | 2022 |
| 928-635 | CenturyLink / Lumen | Local phone company | – |
| 928-637 | CenturyLink / Lumen | Local phone company | – |
| 928-666 | Fractel | Internet / business phone carrier | 2019 |
| 928-679 | CenturyLink / Lumen | Local phone company | – |
| 928-699 | Verizon Wireless | Mobile carrier | – |
| 928-707 | Verizon Wireless | Mobile carrier | – |
| 928-714 | CenturyLink / Lumen | Local phone company | – |
| 928-752 | Allstream | Internet / business phone carrier | – |
| 928-773 | CenturyLink / Lumen | Local phone company | – |
| 928-774 | CenturyLink / Lumen | Local phone company | – |
| 928-779 | CenturyLink / Lumen | Local phone company | – |
| 928-789 | North County Communications | Phone company | – |
| 928-814 | AT&T Mobility | Mobile carrier | 2001 |
| 928-832 | Onvoy | Internet / business phone carrier | – |
| 928-833 | Onvoy | Internet / business phone carrier | – |
| 928-853 | Verizon Wireless | Mobile carrier | – |
| 928-856 | Verizon Wireless | Mobile carrier | – |
| 928-863 | T-Mobile (including Sprint) | Mobile carrier | 2002 |
| 928-864 | CenturyLink / Lumen | Local phone company | 2001 |
| 928-890 | Verizon Wireless | Mobile carrier | – |
| 928-913 | CenturyLink / Lumen | Local phone company | – |
| 928-962 | Onvoy | Internet / business phone carrier | – |
| 928-981 | Onvoy | Internet / business phone carrier | 2020 |
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.