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Area Code 636

Area code 636 is in Missouri, USA, spanning 8 counties and serving 66 cities, including O'Fallon, St Charles or St Peters; it currently uses 411 prefixes, assigned from 636-200-XXXX through 636-999-XXXX.

In service date for area code 636: May 22, 1999.

The current local time is 07:30:04 AM (Central Time Zone).

636 area code location on a map

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For exact boundaries see official 636 area code map

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Locate any 636-NXX prefix:

NPANXX Area served1 Date2
636-200 Manchester N/A
636-201 Warrenton 8/17/2020
636-202 Warrenton 9/18/2018
636-203 Fenton N/A
636-204 Warrenton 6/17/2021
636-205 Winfield 8/16/2002
636-206 St Charles 3/28/2014
636-207 Manchester N/A
636-208 Festus/ Crystal City 10/23/2002
636-209 Festus/ Crystal City N/A
636-210 Union 9/29/2020
636-212 Maxville 10/28/2002
636-213 Warrenton 1/11/2022
636-214 Chesterfield 1/11/2022
636-215 Maxville 1/7/2016
636-216 Chesterfield 6/3/2004
636-218 Maxville 5/26/2021
636-219 St Charles 2/2/2001
636-220 Manchester N/A
636-221 Washington 5/14/2002
636-222 Cedar Hill 10/28/2002
636-223 Imperial 1/29/2002
636-224 Herculaneum/ Pevely N/A
636-225 Valley Park N/A
636-226 Valley Park N/A
636-227 Manchester N/A
636-228 Augusta N/A
636-229 Harvester N/A
636-230 Manchester N/A
636-231 Washington 4/9/2002
636-232 Festus/ Crystal City 4/9/2002
636-233 St Charles 11/6/2001
636-234 Union 4/9/2002
636-235 Warrenton 4/9/2002
636-236 Chesterfield 5/10/2001
636-237 Chesterfield N/A
636-238 Manchester N/A
636-239 Washington N/A
636-240 O'Fallon N/A
636-241 Washington 8/3/2022
636-242 Marthasville 10/12/2006
636-243 De Soto 4/9/2002
636-244 Harvester 8/8/2001
636-245 Maxville 9/21/2020
636-246 St Charles 4/2/2004
636-247 Chesterfield 5/16/2002
636-248 St Peters N/A
636-249 Union 7/3/2014
636-250 Orchard Farm N/A
636-251 Foristell N/A
636-252 Chesterfield 6/29/2021
636-253 High Ridge 5/7/2001
636-255 St Charles N/A
636-256 Manchester N/A
636-257 Pacific N/A
636-258 Orchard Farm N/A
636-259 Gray Summit 5/7/2001
636-261 Harvester 4/14/2003
636-262 Chesterfield N/A
636-263 Harvester 10/18/2001
636-264 Winfield 5/16/2002
636-265 Dardenne 8/8/2001
636-266 Washington 2/28/2002
636-267 Antonia 02/01/2024
636-270 Ware 3/11/2021
636-271 Pacific N/A
636-272 O'Fallon N/A
636-273 Pond N/A
636-274 Cedar Hill N/A
636-275 Maxville 2/11/2015
636-277 St Charles 3/8/2010
636-278 St Peters N/A
636-279 St Peters N/A
636-280 Eureka 3/11/2021
636-281 O'Fallon N/A
636-282 Maxville N/A
636-283 Washington 6/6/2007
636-284 Harvester 5/15/2002
636-285 Cedar Hill N/A
636-287 Maxville N/A
636-288 St Charles N/A
636-289 Hawk Point 2/1/2022
636-290 Troy 8/9/2002
636-292 Chesterfield 4/26/2018
636-293 O'Fallon 8/9/2002
636-294 O'Fallon 8/8/2001
636-295 Troy N/A
636-296 Maxville N/A
636-297 Warrenton N/A
636-299 Chesterfield N/A

NPANXX Area served1 Date2
636-300 Harvester 5/1/2001
636-303 Union 3/23/2017
636-305 Fenton N/A
636-306 Herculaneum/ Pevely 7/3/2014
636-310 Hillsboro 4/5/2016
636-312 O'Fallon 11/6/2015
636-317 Harvester 2/18/2016
636-318 Troy N/A
636-319 Dardenne 5/14/2020
636-320 Harvester N/A
636-321 Maxville N/A
636-322 St Clair 1/10/2006
636-323 Antonia 1/10/2003
636-324 Pond 3/5/2007
636-326 Fenton N/A
636-327 Wentzville N/A
636-328 St Charles N/A
636-329 Harvester 5/1/2001
636-330 De Soto 3/6/2019
636-331 Festus/ Crystal City 8/9/2017
636-332 Wentzville N/A
636-333 Maxville N/A
636-334 Pacific 1/10/2003
636-335 Fenton 7/27/2020
636-336 Harvester N/A
636-337 De Soto N/A
636-338 Hawk Point N/A
636-339 O'Fallon 8/25/2020
636-341 Festus/ Crystal City 4/28/2021
636-342 Harvester 12/22/2021
636-343 Fenton N/A
636-344 Harvester 5/24/2005
636-345 Harvester N/A
636-346 Chesterfield N/A
636-347 De Soto 5/14/2021
636-348 St Peters 9/1/2020
636-349 Fenton N/A
636-351 Ofallon 1/9/2022
636-352 St Charles N/A
636-354 Harvester 8/16/2021
636-355 Foley 1/10/2007
636-356 Moscow Mills N/A
636-357 Wentzville N/A
636-358 Troy N/A
636-359 Warrenton N/A
636-362 Harvester 4/18/2013
636-363 Maxville N/A
636-364 St Clair 1/10/2003
636-366 Moscow Mills N/A
636-367 Troy 03/08/2023
636-368 Chesterfield 7/5/2001
636-369 Washington 3/11/2021
636-373 St Charles N/A
636-375 High Ridge N/A
636-376 High Ridge N/A
636-377 Warrenton 10/12/2006
636-378 St Peters 07/28/2023
636-379 O'Fallon N/A
636-383 Troy 7/3/2014
636-384 Wright City N/A
636-385 O'Fallon 2/25/2011
636-386 Manchester N/A
636-387 St Peters 8/8/2001
636-388 Union 2/28/2002
636-389 St Charles N/A
636-390 Washington N/A
636-391 Manchester N/A
636-392 Washington 6/3/2008
636-393 Pacific 12/13/2004
636-394 Manchester N/A
636-395 St Charles N/A
636-397 St Peters N/A
636-398 New Melle N/A
636-399 Manchester N/A

NPANXX Area served1 Date2
636-400 Portage Des Sioux N/A
636-402 Gray Summit 7/5/2001
636-403 Harvester N/A
636-405 Pond N/A
636-409 O'Fallon 1/5/2016
636-410 St Charles N/A
636-412 Valley Park N/A
636-422 Pond 5/11/2005
636-425 Portage Des Sioux N/A
636-426 Portage Des Sioux 5/10/2001
636-428 High Ridge 6/16/2015
636-429 Eureka 2/1/2013
636-431 Valley Park N/A
636-432 Washington 1/10/2006
636-433 Marthasville N/A
636-434 Portage Des Sioux 7/5/2001
636-435 Valley Park N/A
636-438 Manchester N/A
636-439 O'Fallon 1/14/2011
636-441 Harvester N/A
636-442 Harvester N/A
636-443 St Charles N/A
636-444 Valley Park N/A
636-445 Wentzville 11/13/2012
636-447 Harvester N/A
636-448 St Charles N/A
636-449 Chesterfield N/A
636-451 Gray Summit N/A
636-452 Ware N/A
636-456 Warrenton N/A
636-458 Pond N/A
636-459 Foristell N/A
636-461 Imperial N/A
636-462 Troy N/A
636-463 Foristell N/A
636-464 Imperial N/A
636-465 Festus/ Crystal City 11/7/2006
636-466 Wentzville 3/28/2008
636-467 Imperial N/A
636-474 O'Fallon N/A
636-475 Herculaneum/ Pevely N/A
636-477 Harvester N/A
636-479 Herculaneum/ Pevely N/A
636-481 Hillsboro 7/5/2001
636-482 Augusta N/A
636-484 Manchester N/A
636-485 St Peters N/A
636-486 Harvester 8/26/2002
636-487 St Charles 8/26/2002
636-488 Jonesburg N/A
636-489 Chesterfield N/A
636-492 Fenton N/A
636-493 St Charles N/A
636-495 High Ridge 8/19/2013
636-496 Fenton 10/10/2008
636-497 Wentzville N/A
636-498 Harvester N/A

NPANXX Area served1 Date2
636-500 Imperial N/A
636-515 O'Fallon 1/27/2014
636-517 Valley Park 7/5/2001
636-519 Chesterfield N/A
636-524 Festus/ Crystal City 3/13/2002
636-525 Imperial 7/5/2001
636-527 Manchester N/A
636-528 Troy N/A
636-529 Valley Park N/A
636-530 Chesterfield N/A
636-532 Chesterfield N/A
636-533 Fenton N/A
636-534 Chesterfield N/A
636-535 Festus/ Crystal City 11/10/2014
636-536 Chesterfield N/A
636-537 Chesterfield N/A
636-538 Wentzville N/A
636-541 St Charles 6/8/2001
636-542 O'Fallon 6/19/2007
636-543 Festus/ Crystal City 7/8/2009
636-544 O'Fallon 3/20/2002
636-547 Imperial N/A
636-548 Maxville N/A
636-549 Eureka N/A
636-551 Cedar Hill 3/17/2014
636-552 Manchester N/A
636-556 Valley Park N/A
636-557 Manchester N/A
636-561 Dardenne N/A
636-565 De Soto 2/27/2002
636-566 Winfield N/A
636-573 St Charles N/A
636-574 St Charles N/A
636-575 High Ridge 11/12/2001
636-577 St Peters 3/20/2002
636-578 St Charles 2/2/2001
636-579 Chesterfield 1/26/2001
636-582 Union 6/5/2008
636-583 Union N/A
636-584 Union N/A
636-585 High Hill N/A
636-586 De Soto N/A
636-587 Eureka N/A
636-589 Warrenton 11/15/2022
636-590 Chesterfield N/A
636-591 Manchester N/A
636-594 Manchester N/A
636-597 Truxton N/A

NPANXX Area served1 Date2
636-600 Fenton N/A
636-614 O'Fallon 10/8/2001
636-622 Troy N/A
636-625 Dardenne N/A
636-626 St Peters 9/6/2018
636-627 St Charles 6/7/2002
636-628 Manchester N/A
636-629 St Clair N/A
636-630 O'Fallon 5/19/2022
636-633 Imperial 5/7/2001
636-634 St Charles N/A
636-635 Cedar Hill 6/4/2021
636-637 Festus/ Crystal City 9/3/2019
636-638 Festus/ Crystal City 5/22/2012
636-639 Wentzville N/A
636-642 Imperial N/A
636-648 Portage Des Sioux N/A
636-649 Union 10/27/2011
636-651 Fenton N/A
636-655 Wentzville 9/8/2021
636-660 Fenton 8/13/2002
636-661 Old Monroe N/A
636-662 Foley N/A
636-665 Old Monroe N/A
636-666 Union 12/24/2018
636-667 Washington 1/16/2002
636-668 Winfield N/A
636-669 St Charles N/A
636-671 High Ridge N/A
636-673 Foristell N/A
636-674 Antonia N/A
636-675 Chesterfield 1/18/2001
636-677 High Ridge N/A
636-678 Fenton N/A
636-679 Wentzville N/A
636-680 Fenton N/A
636-681 Chesterfield N/A
636-685 Harvester N/A
636-686 Manchester N/A
636-688 St Charles N/A
636-689 Valley Park N/A
636-692 High Ridge N/A
636-695 Dardenne N/A
636-696 O'Fallon N/A
636-697 St Peters N/A
636-698 Wentzville N/A
636-699 St Charles N/A

NPANXX Area served1 Date2
636-706 St Peters 9/20/2013
636-707 Cedar Hill 12/7/2004
636-717 Fenton N/A
636-720 Harvester N/A
636-722 Harvester N/A
636-723 St Charles N/A
636-724 St Charles N/A
636-725 Festus/ Crystal City 4/18/2011
636-728 Chesterfield N/A
636-730 Chesterfield N/A
636-732 Gray Summit 10/24/2019
636-733 Chesterfield N/A
636-734 St Charles N/A
636-735 Chesterfield N/A
636-736 Chesterfield N/A
636-737 Chesterfield N/A
636-741 Imperial N/A
636-742 Gray Summit N/A
636-744 Union 3/28/2006
636-745 Wright City N/A
636-746 Maxville 2/4/2022
636-747 Pacific 1/5/2016
636-748 Cedar Hill 3/5/2007
636-751 Manchester N/A
636-753 Portage Des Sioux N/A
636-754 St Charles N/A
636-755 Dardenne 1/20/2005
636-757 St Charles N/A
636-758 St Clair 10/25/2019
636-764 Fenton N/A
636-773 St Charles 4/9/2004
636-775 Troy 2/7/2011
636-777 Chesterfield N/A
636-778 Chesterfield N/A
636-779 Manchester N/A
636-782 Holstein 1/10/2007
636-787 Chesterfield N/A
636-789 Hillsboro N/A
636-791 Wright City 1/10/2007
636-793 Harvester N/A
636-794 Harvester N/A
636-795 St Charles N/A
636-797 Hillsboro N/A
636-798 Defiance N/A

NPANXX Area served1 Date2
636-800 St Charles 10/14/2015
636-812 Chesterfield N/A
636-821 Pond N/A
636-825 Valley Park N/A
636-827 Valley Park N/A
636-828 New Melle N/A
636-829 High Ridge 2/6/2019
636-837 Herculaneum/ Pevely 12/22/2020
636-841 Wentzville N/A
636-849 O'Fallon 4/6/2017
636-851 Harvester 7/5/2001
636-856 Wentzville 1/23/2008
636-861 Valley Park N/A
636-865 Hillsboro 3/24/2017
636-866 St Charles N/A
636-867 Jonesburg 1/11/2022
636-874 O'Fallon 2/17/2022
636-875 St Peters 7/6/2007
636-887 Wentzville 12/13/2004
636-888 St Clair 1/21/2014
636-891 Manchester N/A
636-893 Manchester N/A
636-896 St Charles N/A
636-898 Chesterfield N/A
636-899 Portage Des Sioux N/A

NPANXX Area served1 Date2
636-900 Washington 10/14/2015
636-916 St Charles N/A
636-922 Harvester N/A
636-923 Valley Park N/A
636-925 St Charles N/A
636-926 Harvester N/A
636-928 Harvester N/A
636-931 Festus/ Crystal City N/A
636-932 Holstein N/A
636-933 Festus/ Crystal City N/A
636-936 Harvester N/A
636-937 Festus/ Crystal City N/A
636-938 Eureka N/A
636-939 Harvester N/A
636-940 St Charles N/A
636-942 Antonia N/A
636-944 Ware N/A
636-946 St Charles N/A
636-947 St Charles N/A
636-948 Antonia N/A
636-949 St Charles N/A
636-970 St Peters N/A
636-978 O'Fallon N/A
636-980 O'Fallon N/A
636-987 Defiance N/A
636-999 Pacific 3/20/2015
  1. For 'Area served' we list the rate center. In the North American Numbering Plan a rate center is a geographic area used to determine local calling boundaries for billing purposes. Its name is generally a locality, often not the only one served by an NPA-NXX combination.
  2. Assignment date. N/A - mostly central office codes assigned before 2001.
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Cities in area code 636

City1 County Time2
Allenton St Louis C
Arnold Jefferson C
Augusta St Charles C
Ballwin St Louis C
Barnhart Jefferson C
Blackwell St Francois C
Catawissa Franklin C
Cedar Hill Jefferson C
Chesterfield St Louis C
Cottleville St Charles C
Crystal City Jefferson C
De Soto Jefferson C
Defiance St Charles C
Dittmer Jefferson C
Dutzow Warren C
Eureka St Louis C
Fenton St Louis C
Festus Jefferson C
Flinthill St Charles C
Foley Lincoln C
Foristell St Charles C
Gray Summit Franklin C
Grover St Louis C
Grubville Franklin C
Hawk Point Lincoln C
Hematite Jefferson C
Herculaneum Jefferson C
High Hill Montgomery C
High Ridge Jefferson C
Hillsboro Jefferson C
House Springs Jefferson C
Imperial Jefferson C
Jonesburg Montgomery C
Kimmswick Jefferson C
Labadie Franklin C
Lake St Louis St Charles C
Liguori Jefferson C
Lonedell Franklin C
Luebbering Franklin C
Mapaville Jefferson C
Marthasville Warren C
Morse Mill Jefferson C
Moscow Mills Lincoln C
New Melle St Charles C
O'Fallon St Charles C
Old Monroe Lincoln C
Pacific Franklin C
Pevely Jefferson C
Portage Des Sioux St Charles C
Robertsville Franklin C
St Albans Franklin C
St Charles St Charles C
St Clair Franklin C
St Peters St Charles C
Treloar Warren C
Troy Lincoln C
Truxton Lincoln C
Union Franklin C
Valles Mines St Francois C
Villa Ridge Franklin C
Warrenton Warren C
Washington Franklin C
Wentzville St Charles C
West Alton St Charles C
Winfield Lincoln C
Wright City Warren C
  1. Listed above are most places served by USA area code 636. When multiple places in a US state share the same name we list the largest one only. Cities with population over 50,000 are displayed in bold text.
  2. C stands for Central Time Zone (currently 07:30:04 AM).
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