Phone numbers in Ann Arbor, Michigan
Ann Arbor has 133 phone prefixes in area code 734.
Biggest holders: AT&T (local phone), T-Mobile (including Sprint), AT&T Mobility. This is the local calling area (rate center) where those prefixes were first assigned.
- Mobile carrier 36%
- Local phone company 29%
- Internet / business phone carrier 30%
- Paging service 4%
- Phone company 2%
Every prefix in Ann Arbor
Search the first six digits of a number in this list. If it's here, the number started in Ann Arbor with the carrier shown. If it isn't, check the Michigan page or look the number up.
| Prefix | Carrier | Type | Assigned |
|---|---|---|---|
| 734-205 | MCImetro (Verizon Business) | Internet / business phone carrier | – |
| 734-210 | Bandwidth | Internet / business phone carrier | 2018 |
| 734-213 | AT&T (local phone) | Local phone company | – |
| 734-214 | AT&T (local phone) | Local phone company | – |
| 734-216 | T-Mobile (including Sprint) | Mobile carrier | – |
| 734-222 | AT&T (local phone) | Local phone company | – |
| 734-223 | AT&T Mobility | Mobile carrier | – |
| 734-232 | AT&T (local phone) | Local phone company | 2004 |
| 734-239 | Level 3 (Lumen) | Internet / business phone carrier | – |
| 734-249 | Verizon Wireless | Mobile carrier | 2012 |
| 734-251 | Onvoy | Internet / business phone carrier | 2023 |
| 734-255 | Verizon Wireless | Mobile carrier | – |
| 734-260 | T-Mobile (including Sprint) | Mobile carrier | – |
| 734-263 | AT&T Mobility | Mobile carrier | 2015 |
| 734-272 | Level 3 (Lumen) | Internet / business phone carrier | – |
| 734-274 | AT&T Mobility | Mobile carrier | – |
| 734-276 | AT&T Mobility | Mobile carrier | – |
| 734-277 | AT&T Mobility | Mobile carrier | – |
| 734-302 | AT&T (local phone) | Local phone company | – |
| 734-320 | T-Mobile (including Sprint) | Mobile carrier | – |
| 734-323 | T-Mobile (including Sprint) | Mobile carrier | – |
| 734-327 | AT&T (local phone) | Local phone company | – |
| 734-330 | T-Mobile (including Sprint) | Mobile carrier | – |
| 734-332 | AT&T (local phone) | Local phone company | – |
| 734-352 | MCImetro (Verizon Business) | Internet / business phone carrier | – |
| 734-353 | AT&T Mobility | Mobile carrier | – |
| 734-355 | AT&T Mobility | Mobile carrier | – |
| 734-356 | Fractel | Internet / business phone carrier | 2020 |
| 734-358 | AT&T Mobility | Mobile carrier | – |
| 734-368 | T-Mobile (including Sprint) | Mobile carrier | – |
| 734-369 | Comcast | Internet / business phone carrier | – |
| 734-372 | Interactive Services Network | Internet / business phone carrier | – |
| 734-373 | T-Mobile (including Sprint) | Mobile carrier | 2018 |
| 734-389 | Windstream (PAETEC) | Internet / business phone carrier | – |
| 734-395 | Verizon Wireless | Mobile carrier | – |
| 734-412 | Vonage America | Internet / business phone carrier | 2018 |
| 734-417 | Verizon Wireless | Mobile carrier | – |
| 734-418 | Level 3 (Lumen) | Internet / business phone carrier | 2015 |
| 734-436 | Peerless Network Of Michigan | Internet / business phone carrier | – |
| 734-450 | T-Mobile (including Sprint) | Mobile carrier | 2018 |
| 734-465 | AT&T Mobility | Mobile carrier | 2024 |
| 734-473 | Spok | Paging service | – |
| 734-474 | Verizon Wireless | Mobile carrier | – |
| 734-476 | Verizon Wireless | Mobile carrier | – |
| 734-477 | AT&T (local phone) | Local phone company | – |
| 734-478 | Verizon Wireless | Mobile carrier | – |
| 734-489 | Windstream (PAETEC) | Internet / business phone carrier | – |
| 734-492 | Bandwidth | Internet / business phone carrier | 2019 |
| 734-496 | Verizon Wireless | Mobile carrier | 2020 |
| 734-509 | Spok | Paging service | – |
| 734-510 | Teleport Communications America | Internet / business phone carrier | 2021 |
| 734-519 | Bandwidth | Internet / business phone carrier | 2020 |
| 734-527 | Interactive Services Network | Internet / business phone carrier | – |
| 734-531 | MCImetro (Verizon Business) | Internet / business phone carrier | – |
| 734-539 | Teleport Communications America | Internet / business phone carrier | 2018 |
| 734-545 | AT&T Mobility | Mobile carrier | – |
| 734-546 | AT&T Mobility | Mobile carrier | – |
| 734-548 | AT&T Mobility | Mobile carrier | – |
| 734-565 | AT&T (local phone) | Local phone company | 2002 |
| 734-585 | MCImetro (Verizon Business) | Internet / business phone carrier | – |
| 734-590 | Onvoy | Internet / business phone carrier | 2022 |
| 734-596 | T-Mobile (including Sprint) | Mobile carrier | 2021 |
| 734-604 | AT&T Mobility | Mobile carrier | – |
| 734-615 | AT&T (local phone) | Local phone company | – |
| 734-619 | AT&T (local phone) | Local phone company | 2006 |
| 734-622 | AT&T (local phone) | Local phone company | – |
| 734-623 | AT&T (local phone) | Local phone company | – |
| 734-630 | Teleport Communications America | Internet / business phone carrier | 2025 |
| 734-645 | Verizon Wireless | Mobile carrier | – |
| 734-646 | Verizon Wireless | Mobile carrier | – |
| 734-647 | AT&T (local phone) | Local phone company | – |
| 734-649 | Verizon Wireless | Mobile carrier | – |
| 734-651 | American Messaging Services | Paging service | – |
| 734-657 | T-Mobile (including Sprint) | Mobile carrier | – |
| 734-660 | Verizon Wireless | Mobile carrier | – |
| 734-661 | MCImetro (Verizon Business) | Internet / business phone carrier | – |
| 734-662 | AT&T (local phone) | Local phone company | – |
| 734-663 | AT&T (local phone) | Local phone company | – |
| 734-665 | AT&T (local phone) | Local phone company | – |
| 734-668 | AT&T (local phone) | Local phone company | – |
| 734-669 | AT&T (local phone) | Local phone company | – |
| 734-670 | American Messaging Services | Paging service | – |
| 734-677 | AT&T (local phone) | Local phone company | – |
| 734-678 | T-Mobile (including Sprint) | Mobile carrier | – |
| 734-680 | MetroPCS (T-Mobile) | Mobile carrier | – |
| 734-686 | Acd Telecom | Phone company | 2005 |
| 734-707 | Onvoy | Internet / business phone carrier | 2010 |
| 734-709 | T-Mobile (including Sprint) | Mobile carrier | 2002 |
| 734-717 | T-Mobile (including Sprint) | Mobile carrier | – |
| 734-730 | AT&T Mobility | Mobile carrier | – |
| 734-741 | AT&T (local phone) | Local phone company | – |
| 734-747 | AT&T (local phone) | Local phone company | – |
| 734-757 | Teleport Communications America | Internet / business phone carrier | – |
| 734-761 | AT&T (local phone) | Local phone company | – |
| 734-763 | AT&T (local phone) | Local phone company | – |
| 734-764 | AT&T (local phone) | Local phone company | – |
| 734-768 | TON80 Communications | Internet / business phone carrier | 2021 |
| 734-769 | AT&T (local phone) | Local phone company | – |
| 734-773 | T-Mobile (including Sprint) | Mobile carrier | 2015 |
| 734-780 | Teleport Communications America | Internet / business phone carrier | – |
| 734-786 | Level 3 (Lumen) | Internet / business phone carrier | – |
| 734-794 | Windstream (PAETEC) | Internet / business phone carrier | – |
| 734-800 | Onvoy | Internet / business phone carrier | 2015 |
| 734-803 | Teleport Communications America | Internet / business phone carrier | 2020 |
| 734-817 | American Messaging Services | Paging service | – |
| 734-821 | Onvoy | Internet / business phone carrier | – |
| 734-822 | Onvoy | Internet / business phone carrier | – |
| 734-827 | AT&T (local phone) | Local phone company | – |
| 734-834 | AT&T Mobility | Mobile carrier | 2001 |
| 734-845 | T-Mobile (including Sprint) | Mobile carrier | 2001 |
| 734-846 | T-Mobile (including Sprint) | Mobile carrier | – |
| 734-864 | Level 3 (Lumen) | Internet / business phone carrier | – |
| 734-881 | Grid 4 Communications | Phone company | 2015 |
| 734-882 | Comcast | Internet / business phone carrier | 2015 |
| 734-883 | T-Mobile (including Sprint) | Mobile carrier | 2001 |
| 734-887 | Teleport Communications America | Internet / business phone carrier | – |
| 734-904 | Verizon Wireless | Mobile carrier | – |
| 734-913 | AT&T (local phone) | Local phone company | – |
| 734-922 | MCImetro (Verizon Business) | Internet / business phone carrier | – |
| 734-926 | Bandwidth | Internet / business phone carrier | – |
| 734-929 | Comcast | Internet / business phone carrier | – |
| 734-930 | AT&T (local phone) | Local phone company | – |
| 734-936 | AT&T (local phone) | Local phone company | – |
| 734-945 | T-Mobile (including Sprint) | Mobile carrier | – |
| 734-971 | AT&T (local phone) | Local phone company | – |
| 734-972 | T-Mobile (including Sprint) | Mobile carrier | – |
| 734-973 | AT&T (local phone) | Local phone company | – |
| 734-975 | AT&T (local phone) | Local phone company | – |
| 734-994 | AT&T (local phone) | Local phone company | – |
| 734-995 | AT&T (local phone) | Local phone company | – |
| 734-996 | AT&T (local phone) | Local phone company | – |
| 734-997 | AT&T (local phone) | Local phone company | – |
| 734-998 | 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.