To faciltiate users, the United States of America is divided into regions known as Area Codes, corresponding to particular geographic telephone dialing areas.
An area code denotes the regional location of a phone number within the United States.
The Area Code table below shows an area codes each.
Area Code 636 listing, by city
@The cities listed with each area code are the major cities for that area code;
| City / State | Area code | Zip Code | County | Iso | |
|---|---|---|---|---|---|
| Arnold (Missouri) | 636 | 63010 | Jefferson | US-MO | |
| Augusta (Missouri) | 636 | 63332 | St. Charles | US-MO | |
| Ballwin (Missouri) | 636 | 63011 | St. Louis | US-MO | |
| Ballwin (Missouri) | 636 | 63021 | St. Louis | US-MO | |
| Ballwin (Missouri) | 636 | 63022 | St. Louis | US-MO | |
| Ballwin (Missouri) | 636 | 63024 | St. Louis | US-MO | |
| Barnhart (Missouri) | 636 | 63012 | Jefferson | US-MO | |
| Berger (Missouri) | 636 | 63014 | Franklin | US-MO | |
| Blackwell (Missouri) | 636 | 63626 | Washington | US-MO | |
| Bridgeton (Missouri) | 636 | 63044 | St. Louis | US-MO | |
| Catawissa (Missouri) | 636 | 63015 | Franklin | US-MO | |
| Cedar Hill (Missouri) | 636 | 63016 | Jefferson | US-MO | |
| Chesterfield (Missouri) | 636 | 63006 | St. Louis | US-MO | |
| Chesterfield (Missouri) | 636 | 63005 | St. Louis | US-MO | |
| Chesterfield (Missouri) | 636 | 63017 | St. Louis | US-MO | |
| Cottleville (Missouri) | 636 | 63338 | St. Charles | US-MO | |
| Crystal City (Missouri) | 636 | 63019 | Jefferson | US-MO | |
| De Soto (Missouri) | 636 | 63020 | Jefferson | US-MO | |
| Defiance (Missouri) | 636 | 63341 | St. Charles | US-MO | |
| Dittmer (Missouri) | 636 | 63023 | Jefferson | US-MO | |
| Dutzow (Missouri) | 636 | 63342 | Warren | US-MO | |
| Earth City (Missouri) | 636 | 63045 | St. Louis | US-MO | |
| Eureka (Missouri) | 636 | 63025 | St. Louis | US-MO | |
| Fenton (Missouri) | 636 | 63026 | St. Louis | US-MO | |
| Fenton (Missouri) | 636 | 63099 | St. Louis | US-MO | |
| Festus (Missouri) | 636 | 63028 | Jefferson | US-MO | |
| Fletcher (Missouri) | 636 | 63030 | Washington | US-MO | |
| Flinthill (Missouri) | 636 | 63346 | St. Charles | US-MO | |
| Florissant (Missouri) | 636 | 63034 | St. Louis | US-MO | |
| Foley (Missouri) | 636 | 63347 | Lincoln | US-MO | |
| Foristell (Missouri) | 636 | 63348 | St. Charles | US-MO | |
| Glencoe (Missouri) | 636 | 63038 | St. Louis | US-MO | |
| Gray Summit (Missouri) | 636 | 63039 | Franklin | US-MO | |
| Grover (Missouri) | 636 | 63040 | St. Louis | US-MO | |
| Grubville (Missouri) | 636 | 63041 | Franklin | US-MO | |
| Hawk Point (Missouri) | 636 | 63349 | Lincoln | US-MO | |
| Hematite (Missouri) | 636 | 63047 | Jefferson | US-MO | |
| Herculaneum (Missouri) | 636 | 63048 | Jefferson | US-MO | |
| High Hill (Missouri) | 636 | 63350 | Montgomery | US-MO | |
| High Ridge (Missouri) | 636 | 63049 | Jefferson | US-MO | |
| Hillsboro (Missouri) | 636 | 63050 | Jefferson | US-MO | |
| House Springs (Missouri) | 636 | 63051 | Jefferson | US-MO | |
| Imperial (Missouri) | 636 | 63052 | Jefferson | US-MO | |
| Jonesburg (Missouri) | 636 | 63351 | Montgomery | US-MO | |
| Kimmswick (Missouri) | 636 | 63053 | Jefferson | US-MO | |
| Labadie (Missouri) | 636 | 63055 | Franklin | US-MO | |
| Lake Saint Louis (Missouri) | 636 | 63367 | St. Charles | US-MO | |
| Liguori (Missouri) | 636 | 63057 | Jefferson | US-MO | |
| Lonedell (Missouri) | 636 | 63060 | Franklin | US-MO | |
| Mapaville (Missouri) | 636 | 63065 | Jefferson | US-MO | |
| Marthasville (Missouri) | 636 | 63357 | Warren | US-MO | |
| Maryland Heights (Missouri) | 636 | 63043 | St. Louis | US-MO | |
| Morse Mill (Missouri) | 636 | 63066 | Jefferson | US-MO | |
| Moscow Mills (Missouri) | 636 | 63362 | Lincoln | US-MO | |
| New Florence (Missouri) | 636 | 63363 | Morgan | US-MO | |
| New Haven (Missouri) | 636 | 63068 | Franklin | US-MO | |
| New Melle (Missouri) | 636 | 63365 | St. Charles | US-MO | |
| O Fallon (Missouri) | 636 | 63366 | St. Charles | US-MO | |
| O Fallon (Missouri) | 636 | 63368 | St. Charles | US-MO | |
| Old Monroe (Missouri) | 636 | 63369 | Lincoln | US-MO | |
| Pacific (Missouri) | 636 | 63069 | Franklin | US-MO | |
| Pevely (Missouri) | 636 | 63070 | Jefferson | US-MO | |
| Portage Des Sioux (Missouri) | 636 | 63373 | St. Charles | US-MO | |
| Robertsville (Missouri) | 636 | 63072 | Franklin | US-MO | |
| Saint Albans (Missouri) | 636 | 63073 | Franklin | US-MO | |
| Saint Ann (Missouri) | 636 | 63074 | St. Louis | US-MO | |
| Saint Charles (Missouri) | 636 | 63302 | St. Charles | US-MO | |
| Saint Charles (Missouri) | 636 | 63301 | St. Charles | US-MO | |
| Saint Charles (Missouri) | 636 | 63303 | St. Charles | US-MO | |
| Saint Charles (Missouri) | 636 | 63304 | St. Charles | US-MO | |
| Saint Clair (Missouri) | 636 | 63077 | Franklin | US-MO | |
| Saint Louis (Missouri) | 636 | 63124 | St. Louis | US-MO | |
| Saint Louis (Missouri) | 636 | 63132 | St. Louis | US-MO | |
| Saint Louis (Missouri) | 636 | 63141 | St. Louis | US-MO | |
| Saint Louis (Missouri) | 636 | 63146 | St. Louis | US-MO | |
| Saint Peters (Missouri) | 636 | 63376 | St. Charles | US-MO | |
| Treloar (Missouri) | 636 | 63378 | Warren | US-MO | |
| Troy (Missouri) | 636 | 63379 | Lincoln | US-MO | |
| Truxton (Missouri) | 636 | 63381 | Warren | US-MO | |
| Union (Missouri) | 636 | 63084 | Franklin | US-MO | |
| Valles Mines (Missouri) | 636 | 63087 | St. Francois | US-MO | |
| Valley Park (Missouri) | 636 | 63088 | St. Louis | US-MO | |
| Villa Ridge (Missouri) | 636 | 63089 | Franklin | US-MO | |
| Warrenton (Missouri) | 636 | 63383 | Warren | US-MO | |
| Washington (Missouri) | 636 | 63090 | Franklin | US-MO | |
| Wentzville (Missouri) | 636 | 63385 | St. Charles | US-MO | |
| West Alton (Missouri) | 636 | 63386 | St. Charles | US-MO | |
| Winfield (Missouri) | 636 | 63389 | Lincoln | US-MO | |
| Wright City (Missouri) | 636 | 63390 | Warren | US-MO |