| District of Michigan area codes: 734 | |
|---|---|
| Country | United States |
| State/Province | Michigan |
| Major City | Detroit |
| Time Zone | Eastern (UTC-05:00) |
| Prefix | County | Primary City | Company |
|---|---|---|---|
| 734-225 | Wayne | Wyandotte, MI | Sigecom |
| 734-226 | Washtenaw | Ypsilanti, MI | Usa Mobility Wireless |
| 734-227 | Monroe | Monroe, MI | Usa Mobility Wireless |
| 734-228 | Washtenaw | Ann Arbor, MI | American Messaging (am) |
| 734-229 | Wayne | Romulus, MI | Ameritech Michigan |
| 734-230 | Monroe | Monroe, MI | Phone Michigan |
| 734-231 | Wayne | Trenton, MI | Sprint Spectrum L.p. |
| 734-232 | Washtenaw | Ann Arbor, MI | Ameritech Michigan |
| 734-233 | Wayne | Plymouth, MI | New Cingular Wireless PCS - IL |
| 734-234 | Monroe | Temperance, MI | Phone Michigan |
| 734-235 | Peerless Network Of Michigan | ||
| 734-236 | Wayne | Rockwood, MI | Long Distance Of Michigan DBA Ldmi |
| 734-237 | Wayne | Livonia, MI | Phone Michigan |
| 734-238 | Wayne | Detroit, MI | Broadwing Communications |
| 734-239 | Washtenaw | Ann Arbor, MI | Broadwing Communications |
| 734-240 | Monroe | Monroe, MI | Ameritech Michigan |
| 734-241 | Monroe | Monroe, MI | Ameritech Michigan |
| 734-242 | Monroe | Monroe, MI | Ameritech Michigan |
| 734-243 | Monroe | Monroe, MI | Ameritech Michigan |
| 734-244 | Monroe | Monroe, MI | Teleport Communications America |
There are 608 prefixes, In the code area, the major cities are Ann Arbor, MI;Canton, MI;Garden City, MI;Livonia, . The major city is Detroit.