Phone numbers in Ypsilanti, Michigan
Ypsilanti has 52 phone prefixes in area code 734.
Biggest holders: AT&T (local phone), T-Mobile (including Sprint), Verizon Wireless. This is the local calling area (rate center) where those prefixes were first assigned.
- Mobile carrier 31%
- Local phone company 33%
- Internet / business phone carrier 33%
- Paging service 4%
Every prefix in Ypsilanti
Search the first six digits of a number in this list. If it's here, the number started in Ypsilanti with the carrier shown. If it isn't, check the Michigan page or look the number up.
| Prefix | Carrier | Type | Assigned |
|---|---|---|---|
| 734-209 | Verizon Wireless | Mobile carrier | 2013 |
| 734-217 | Level 3 (Lumen) | Internet / business phone carrier | 2004 |
| 734-218 | AT&T Mobility | Mobile carrier | – |
| 734-219 | Onvoy | Internet / business phone carrier | 2010 |
| 734-221 | CenturyLink / Lumen | Local phone company | 2013 |
| 734-226 | Spok | Paging service | – |
| 734-262 | T-Mobile (including Sprint) | Mobile carrier | – |
| 734-273 | Verizon Wireless | Mobile carrier | – |
| 734-291 | T-Mobile (including Sprint) | Mobile carrier | 2015 |
| 734-337 | Level 3 (Lumen) | Internet / business phone carrier | – |
| 734-340 | Comcast | Internet / business phone carrier | – |
| 734-350 | AT&T (local phone) | Local phone company | 2019 |
| 734-383 | T-Mobile (including Sprint) | Mobile carrier | – |
| 734-390 | Windstream (PAETEC) | Internet / business phone carrier | – |
| 734-400 | Onvoy | Internet / business phone carrier | 2015 |
| 734-434 | AT&T (local phone) | Local phone company | – |
| 734-445 | MCImetro (Verizon Business) | Internet / business phone carrier | – |
| 734-448 | MCImetro (Verizon Business) | Internet / business phone carrier | – |
| 734-480 | AT&T (local phone) | Local phone company | – |
| 734-481 | AT&T (local phone) | Local phone company | – |
| 734-482 | AT&T (local phone) | Local phone company | – |
| 734-483 | AT&T (local phone) | Local phone company | – |
| 734-484 | AT&T (local phone) | Local phone company | – |
| 734-485 | AT&T (local phone) | Local phone company | – |
| 734-487 | AT&T (local phone) | Local phone company | – |
| 734-495 | AT&T (local phone) | Local phone company | – |
| 734-507 | T-Mobile (including Sprint) | Mobile carrier | – |
| 734-528 | AT&T (local phone) | Local phone company | – |
| 734-533 | Interactive Services Network | Internet / business phone carrier | – |
| 734-544 | AT&T (local phone) | Local phone company | – |
| 734-547 | AT&T (local phone) | Local phone company | – |
| 734-557 | Level 3 (Lumen) | Internet / business phone carrier | – |
| 734-572 | AT&T (local phone) | Local phone company | – |
| 734-573 | Interactive Services Network | Internet / business phone carrier | – |
| 734-576 | T-Mobile (including Sprint) | Mobile carrier | – |
| 734-579 | Onvoy | Internet / business phone carrier | 2023 |
| 734-602 | Boost / Virgin Mobile | Mobile carrier | 2022 |
| 734-635 | AT&T Mobility | Mobile carrier | – |
| 734-644 | T-Mobile (including Sprint) | Mobile carrier | – |
| 734-695 | AT&T (local phone) | Local phone company | 2007 |
| 734-712 | AT&T (local phone) | Local phone company | – |
| 734-714 | Windstream (PAETEC) | Internet / business phone carrier | – |
| 734-754 | T-Mobile (including Sprint) | Mobile carrier | – |
| 734-802 | AT&T Mobility | Mobile carrier | 2016 |
| 734-829 | Verizon Wireless | Mobile carrier | – |
| 734-860 | American Messaging Services | Paging service | – |
| 734-879 | Teleport Communications America | Internet / business phone carrier | – |
| 734-896 | T-Mobile (including Sprint) | Mobile carrier | 2015 |
| 734-905 | T-Mobile (including Sprint) | Mobile carrier | – |
| 734-961 | Comcast | Internet / business phone carrier | – |
| 734-985 | MCImetro (Verizon Business) | Internet / business phone carrier | – |
| 734-999 | Peerless Network Of Michigan | Internet / business phone carrier | 2014 |
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.