| District of Michigan area codes: 313 | |
|---|---|
| Country | United States |
| State/Province | Michigan |
| Major City | Detroit |
| Time Zone | Eastern (UTC-05:00) |
| Prefix | County | Primary City | Company |
|---|---|---|---|
| 313-307 | Wayne | Detroit, MI | Broadvox-clec |
| 313-308 | Wayne | Detroit, MI | Phone Michigan |
| 313-309 | Wayne | Detroit, MI | Phone Michigan |
| 313-310 | Wayne | Detroit, MI | New Cingular Wireless PCS - IL |
| 313-312 | Wayne | Detroit, MI | Us Xchange Of Michigan LLC DBA Choice One Comm Mi |
| 313-315 | Wayne | Detroit, MI | Sprint Spectrum L.p. |
| 313-316 | Wayne | Detroit, MI | Cellco Partnership DBA Verizon Wireless |
| 313-317 | Wayne | Dearborn, MI | Ameritech Michigan |
| 313-318 | Wayne | Detroit, MI | New Cingular Wireless PCS - IL |
| 313-319 | Wayne | Detroit, MI | Cellco Partnership DBA Verizon Wireless |
| 313-320 | Wayne | Detroit, MI | New Cingular Wireless PCS - IL |
| 313-321 | Oakland | Southfield, MI | Usa Mobility Wireless |
| 313-322 | Wayne | Dearborn, MI | Ameritech Michigan |
| 313-323 | Wayne | Dearborn, MI | Ameritech Michigan |
| 313-324 | Wayne | Detroit, MI | Teleport Communications America |
| 313-325 | Wayne | Detroit, MI | American Messaging (am) |
| 313-326 | Wayne | Detroit, MI | Sprint Spectrum L.p. |
| 313-327 | Wayne | Hamtramck, MI | Omnipoint Communications Midwest Operations LLC |
| 313-328 | Oakland | Southfield, MI | Usa Mobility Wireless |
| 313-329 | Comlink |
There are 633 prefixes, In the code area, the major cities are Allen Park, MI;Dearborn, MI;Dearborn Heights, MI;D. The major city is Detroit.