| 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 |
|---|---|---|---|
| 636-463 | Saint Charles | Foristell, MO | Centurytel Missouri LLC (southwest)dba Centurylink |
| 636-464 | Jefferson | Imperial, MO | Southwestern Bell |
| 636-465 | Jefferson | Crystal City, MO | Charter Fiberlink |
| 636-466 | Saint Charles | Wentzville, MO | Leap Wireless Intl DBA Cricket Comm |
| 636-467 | Jefferson | Imperial, MO | Southwestern Bell |
| 636-474 | Saint Charles | Saint Peters, MO | Centurytel Missouri LLC (southwest)dba Centurylink |
| 636-475 | Jefferson | Herculaneum, MO | Southwestern Bell |
| 636-477 | Saint Charles | Harvester, MO | Southwestern Bell |
| 636-479 | Jefferson | Herculaneum, MO | Southwestern Bell |
| 636-481 | Jefferson | Hillsboro, MO | Level 3 Communications |
| 636-482 | Saint Charles | Augusta, MO | Centurytel Missouri LLC (southwest)dba Centurylink |
| 636-484 | Saint Louis | Manchester, MO | Cellco Partnership DBA Verizon Wireless |
| 636-485 | Saint Charles | St Peters, MO | Cellco Partnership DBA Verizon Wireless |
| 636-486 | Saint Charles | Harvester, MO | Level 3 Communications |
| 636-487 | Saint Charles | Saint Charles, MO | Level 3 Communications |
| 636-488 | Montgomery | Jonesburg, MO | Centurytel Missouri LLC (southwest)dba Centurylink |
| 636-489 | Saint Louis | Chesterfield, MO | Level 3 Communications |
| 636-492 | Saint Louis | Fenton, MO | Mci Worldcom Communications, Inc |
| 636-493 | Saint Louis | Earth City, MO | Charter Fiberlink |
| 636-495 | Jefferson | High Ridge, MO | Windstream Nuvox Missouri Inc. |
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.