| District of Missouri area codes: 636 | |
|---|---|
| Country | United States |
| State/Province | Missouri |
| Major City | Saint Louis |
| Time Zone | Central (UTC-06:00) |
| Prefix | County | Primary City | Company |
|---|---|---|---|
| 636-391 | Saint Louis | Manchester, MO | Southwestern Bell |
| 636-392 | Franklin | Washington, MO | Aurora Communications |
| 636-393 | Franklin | Pacific, MO | Charter Fiberlink |
| 636-394 | Saint Louis | Manchester, MO | Southwestern Bell |
| 636-395 | Saint Louis | Earth City, MO | Sbc Internet Services |
| 636-397 | Saint Charles | St Peters, MO | Centurytel Missouri LLC (southwest)dba Centurylink |
| 636-398 | Saint Charles | Defiance, MO | Centurytel Missouri LLC (southwest)dba Centurylink |
| 636-399 | Saint Louis | Manchester, MO | Cellco Partnership DBA Verizon Wireless |
| 636-400 | Saint Charles | Portage Des Sioux, MO | Birch Telecom Of Missouri |
| 636-402 | Franklin | Gray Summit, MO | Windstream Nuvox Missouri Inc. |
| 636-403 | Saint Charles | Harvester, MO | Usa Mobility Wireless |
| 636-405 | Saint Louis | Pond, MO | Southwestern Bell |
| 636-410 | Saint Louis | Earth City, MO | Xo Missouri |
| 636-412 | Saint Louis | Valley Park, MO | Xo Missouri |
| 636-422 | Saint Louis | Pond, MO | Southwestern Bell |
| 636-425 | Saint Charles | Portage Des Sioux, MO | Windstream Nuvox Missouri Inc. |
| 636-426 | Saint Charles | Portage Des Sioux, MO | T-mobile Usa |
| 636-429 | Saint Louis | Eureka, MO | Peerless Network Of Missouri |
| 636-431 | Saint Louis | Valley Park, MO | Mci Worldcom Communications, Inc |
| 636-432 | Franklin | Washington, MO | Southwestern Bell |
There are 353 prefixes, In the code area, the major cities are Ballwin, MO;Chesterfield, MO;O'fallon, MO;St. Char. The major city is Saint Louis.