| District of South Dakota area codes: 605 | |
|---|---|
| Country | United States |
| State/Province | South Dakota |
| Major City | Sioux Falls |
| Time Zone | Central (UTC-06:00) |
| Prefix | County | Primary City | Company |
|---|---|---|---|
| 605-306 | Minnehaha | Sioux Falls, SD | Knology Of The Plains |
| 605-309 | Todd | Mission, SD | Bandwidth.com Clec |
| 605-310 | Minnehaha | Sioux Falls, SD | Cellco Partnership DBA Verizon Wireless |
| 605-312 | Minnehaha | Sioux Falls, SD | Qwest Corporation |
| 605-314 | Corson | Mc Laughlin, SD | Standing Rock Telecommunications |
| 605-319 | Todd | Mission, SD | New Cingular Wireless PCS - IL |
| 605-321 | Minnehaha | Sioux Falls, SD | Cellco Partnership DBA Verizon Wireless |
| 605-322 | Minnehaha | Sioux Falls, SD | Qwest Corporation |
| 605-323 | Minnehaha | Sioux Falls, SD | Qwest Corporation |
| 605-324 | Faulk | Cresbard, SD | Western Telephone Co. |
| 605-325 | Day | Bristol, SD | Venture Communications Cooperative |
| 605-326 | Turner | Viborg, SD | Fort Randall Telco DBA Mt Rushmore Telephone Co |
| 605-327 | Turner | Viborg, SD | Knology Community Telephone |
| 605-328 | Minnehaha | Sioux Falls, SD | Qwest Corporation |
| 605-329 | Brown | Frederick, SD | James Valley Cooperative Telephone Company |
| 605-330 | Minnehaha | Sioux Falls, SD | Qwest Corporation |
| 605-331 | Minnehaha | Sioux Falls, SD | Qwest Corporation |
| 605-332 | Minnehaha | Sioux Falls, SD | Qwest Corporation |
| 605-333 | Minnehaha | Sioux Falls, SD | Qwest Corporation |
| 605-334 | Minnehaha | Sioux Falls, SD | Qwest Corporation |
There are 630 prefixes, In the code area, the major cities are Aberdeen, SD;Pierre, SD;Rapid City, SD;Sioux Falls. The major city is Sioux Falls.