636 Area Code: Location, Cities, Map And Time Zone

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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 429 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 .

636 area code location on a map
© OpenStreetMap contributorsFor exact NPA boundaries see official 636 area code map

Phone number lookup

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More Missouri area codes:

  • 235
  • 314
  • 417
  • 557
  • 573
  • 660
  • 816
  • 975

Locate any 636-NXX prefix:

636-200-XXXX --- 636-299-XXXX
NPANXX Area served[1] Provider[2] Date[3]
636-200 Manchester Multiple N/A
636-201 Warrenton Multiple 8/17/2020
636-202 Warrenton Multiple 9/18/2018
636-203 Fenton Multiple N/A
636-204 Warrenton Multiple 6/17/2021
636-205 Winfield Multiple 8/16/2002
636-206 St Charles Multiple 3/28/2014
636-207 Manchester Southwestern Bell N/A
636-208 Festus-Crystal City New Cingular Wireless PCS 10/23/2002
636-209 Festus-Crystal City Multiple N/A
636-210 Union Multiple 9/29/2020
636-212 Maxville Multiple 10/28/2002
636-213 Warrenton Multiple 1/11/2022
636-214 Chesterfield Multiple 1/11/2022
636-215 Maxville Multiple 1/7/2016
636-216 Chesterfield Onvoy 6/3/2004
636-218 Maxville Multiple 5/26/2021
636-219 St Charles T-Mobile USA 2/2/2001
636-220 Manchester Multiple N/A
636-221 Washington Multiple 5/14/2002
636-222 Cedar Hill Multiple 10/28/2002
636-223 Imperial Multiple 1/29/2002
636-224 Herculaneum-Pevely Multiple N/A
636-225 Valley Park Southwestern Bell N/A
636-226 Valley Park Multiple N/A
636-227 Manchester Southwestern Bell N/A
636-228 Augusta Multiple N/A
636-229 Harvester Multiple N/A
636-230 Manchester Southwestern Bell N/A
636-231 Washington Multiple 4/9/2002
636-232 Festus-Crystal City Multiple 4/9/2002
636-233 St Charles Multiple 11/6/2001
636-234 Union Multiple 4/9/2002
636-235 Warrenton Multiple 4/9/2002
636-236 Chesterfield Multiple 5/10/2001
636-237 Chesterfield Multiple N/A
636-238 Manchester Multiple N/A
636-239 Washington Southwestern Bell N/A
636-240 O'Fallon Brightspeed Of Missouri N/A
636-241 Washington Multiple 8/3/2022
636-242 Marthasville Multiple 10/12/2006
636-243 De Soto Multiple 4/9/2002
636-244 Harvester Multiple 8/8/2001
636-245 Maxville Multiple 9/21/2020
636-246 St Charles Onvoy 4/2/2004
636-247 Chesterfield Southwestern Bell 5/16/2002
636-248 St Peters Cellco Partnership N/A
636-249 Union Multiple 7/3/2014
636-250 Orchard Farm Multiple N/A
636-251 Foristell Multiple N/A
636-252 Chesterfield Multiple 6/29/2021
636-253 High Ridge Multiple 5/7/2001
636-254 Manchester Multiple 02/23/2024
636-255 St Charles Multiple N/A
636-256 Manchester Southwestern Bell N/A
636-257 Pacific Multiple N/A
636-258 Orchard Farm Multiple N/A
636-259 Gray Summit Multiple 5/7/2001
636-260 St Charles Multiple 02/26/2024
636-261 Harvester Southwestern Bell 4/14/2003
636-262 Chesterfield Multiple N/A
636-263 Harvester Multiple 10/18/2001
636-264 Winfield Multiple 5/16/2002
636-265 Dardenne Multiple 8/8/2001
636-266 Washington Multiple 2/28/2002
636-267 Antonia Multiple 02/01/2024
636-268 Chesterfield Multiple 03/21/2024
636-269 Maxville Multiple 03/21/2024
636-270 Ware Multiple 3/11/2021
636-271 Pacific Multiple N/A
636-272 O'Fallon Brightspeed Of Missouri N/A
636-273 Pond Multiple N/A
636-274 Cedar Hill Multiple N/A
636-275 Maxville Multiple 2/11/2015
636-276 St Clair Multiple 06/12/2024
636-277 St Charles Multiple 3/8/2010
636-278 St Peters Multiple N/A
636-279 St Peters Multiple N/A
636-280 Eureka Multiple 3/11/2021
636-281 O'Fallon Multiple N/A
636-282 Maxville Multiple N/A
636-283 Washington Multiple 6/6/2007
636-284 Harvester Multiple 5/15/2002
636-285 Cedar Hill Multiple N/A
636-286 Union Multiple 12/17/2024
636-287 Maxville Multiple N/A
636-288 St Charles New Cingular Wireless PCS N/A
636-289 Hawk Point Multiple 2/1/2022
636-290 Troy Multiple 8/9/2002
636-291 Washington New Cingular Wireless PCS 09/19/2025
636-292 Chesterfield Teleport Communications America 4/26/2018
636-293 O'Fallon T-Mobile USA 8/9/2002
636-294 O'Fallon Charter IP Enabled Services 8/8/2001
636-295 Troy Multiple N/A
636-296 Maxville Southwestern Bell N/A
636-297 Warrenton Multiple N/A
636-298 Manchester Multiple 09/19/2025
636-299 Chesterfield Multiple N/A
636-300-XXXX --- 636-399-XXXX
NPANXX Area served[1] Provider[2] Date[3]
636-300 Harvester Multiple 5/1/2001
636-303 Union Multiple 3/23/2017
636-305 Fenton Southwestern Bell N/A
636-306 Herculaneum-Pevely Multiple 7/3/2014
636-310 Hillsboro Multiple 4/5/2016
636-312 O'Fallon Multiple 11/6/2015
636-317 Harvester Multiple 2/18/2016
636-318 Troy Multiple N/A
636-319 Dardenne Multiple 5/14/2020
636-320 Harvester USA Mobility Wireless N/A
636-321 Maxville Multiple N/A
636-322 St Clair Multiple 1/10/2006
636-323 Antonia Multiple 1/10/2003
636-324 Pond Multiple 3/5/2007
636-326 Fenton Multiple N/A
636-327 Wentzville Brightspeed Of Missouri N/A
636-328 St Charles Multiple N/A
636-329 Harvester Multiple 5/1/2001
636-330 De Soto Multiple 3/6/2019
636-331 Festus-Crystal City Multiple 8/9/2017
636-332 Wentzville Brightspeed Of Missouri N/A
636-333 Maxville Multiple N/A
636-334 Pacific Multiple 1/10/2003
636-335 Fenton MCIMetro Access Transmission Services 7/27/2020
636-336 Harvester Multiple N/A
636-337 De Soto Multiple N/A
636-338 Hawk Point Multiple N/A
636-339 O'Fallon Multiple 8/25/2020
636-341 Festus-Crystal City Multiple 4/28/2021
636-342 Harvester Multiple 12/22/2021
636-343 Fenton Southwestern Bell N/A
636-344 Harvester Multiple 5/24/2005
636-345 Harvester Multiple N/A
636-346 Chesterfield Multiple N/A
636-347 De Soto Multiple 5/14/2021
636-348 St Peters Multiple 9/1/2020
636-349 Fenton Southwestern Bell N/A
636-351 Ofallon Multiple 1/9/2022
636-352 St Charles Multiple N/A
636-354 Harvester Multiple 8/16/2021
636-355 Foley Multiple 1/10/2007
636-356 Moscow Mills Multiple N/A
636-357 Wentzville New Cingular Wireless PCS N/A
636-358 Troy New Cingular Wireless PCS N/A
636-359 Warrenton New Cingular Wireless PCS N/A
636-362 Harvester Multiple 4/18/2013
636-364 St Clair Multiple 1/10/2003
636-366 Moscow Mills Multiple N/A
636-367 Troy Multiple 03/08/2023
636-368 Chesterfield Multiple 7/5/2001
636-369 Washington Multiple 3/11/2021
636-373 St Charles Multiple N/A
636-375 High Ridge Multiple N/A
636-376 High Ridge Multiple N/A
636-377 Warrenton Multiple 10/12/2006
636-378 St Peters Multiple 07/28/2023
636-379 O'Fallon Brightspeed Of Missouri N/A
636-380 Troy Multiple 02/16/2024
636-383 Troy Multiple 7/3/2014
636-384 Wright City Multiple N/A
636-385 O'Fallon Multiple 2/25/2011
636-386 Manchester Multiple N/A
636-387 St Peters Multiple 8/8/2001
636-388 Union Multiple 2/28/2002
636-389 St Charles Multiple N/A
636-390 Washington Southwestern Bell N/A
636-391 Manchester Southwestern Bell N/A
636-392 Washington Multiple 6/3/2008
636-393 Pacific Multiple 12/13/2004
636-394 Manchester Southwestern Bell N/A
636-395 St Charles Multiple N/A
636-396 Festus-Crystal City Multiple 03/13/2024
636-397 St Peters Brightspeed Of Missouri N/A
636-398 New Melle Multiple N/A
636-399 Manchester Cellco Partnership N/A
636-400-XXXX --- 636-498-XXXX
NPANXX Area served[1] Provider[2] Date[3]
636-400 Portage Des Sioux Multiple N/A
636-402 Gray Summit Multiple 7/5/2001
636-403 Harvester USA Mobility Wireless N/A
636-405 Pond Multiple N/A
636-406 Cedar Hill Multiple 03/21/2024
636-407 De Soto Multiple 03/21/2024
636-408 High Ridge Onvoy 03/21/2024
636-409 O'Fallon Multiple 1/5/2016
636-410 St Charles Multiple N/A
636-412 Valley Park MCIMetro Access Transmission Services N/A
636-415 Harvester Multiple 04/16/2024
636-422 Pond Multiple 5/11/2005
636-424 Pond Multiple 03/29/2024
636-425 Portage Des Sioux Multiple N/A
636-426 Portage Des Sioux Multiple 5/10/2001
636-427 St Peters Multiple 01/07/2025
636-428 High Ridge Multiple 6/16/2015
636-429 Eureka Multiple 2/1/2013
636-430 Foristell Multiple 05/05/2025
636-431 Valley Park Multiple N/A
636-432 Washington Multiple 1/10/2006
636-433 Marthasville Multiple N/A
636-434 Portage Des Sioux Multiple 7/5/2001
636-435 Valley Park Multiple N/A
636-438 Manchester Multiple N/A
636-439 O'Fallon Multiple 1/14/2011
636-441 Harvester Southwestern Bell N/A
636-442 Harvester Multiple N/A
636-443 St Charles Multiple N/A
636-444 Valley Park Multiple N/A
636-445 Wentzville Multiple 11/13/2012
636-447 Harvester Southwestern Bell N/A
636-448 St Charles New Cingular Wireless PCS N/A
636-449 Chesterfield Multiple N/A
636-450 Harvester Multiple 05/09/2025
636-451 Gray Summit Multiple N/A
636-452 Ware Multiple N/A
636-456 Warrenton Brightspeed Of Missouri N/A
636-458 Pond Southwestern Bell N/A
636-459 Foristell Multiple N/A
636-461 Imperial Multiple N/A
636-462 Troy Multiple N/A
636-463 Foristell Multiple N/A
636-464 Imperial Southwestern Bell N/A
636-465 Festus-Crystal City Multiple 11/7/2006
636-466 Wentzville Multiple 3/28/2008
636-467 Imperial Multiple N/A
636-473 Antonia AT&T 07/24/2025
636-474 O'Fallon Multiple N/A
636-475 Herculaneum-Pevely Multiple N/A
636-477 Harvester Multiple N/A
636-479 Herculaneum-Pevely Multiple N/A
636-481 Hillsboro Multiple 7/5/2001
636-482 Augusta Multiple N/A
636-484 Manchester Multiple N/A
636-485 St Peters Cellco Partnership N/A
636-486 Harvester Multiple 8/26/2002
636-487 St Charles Multiple 8/26/2002
636-488 Jonesburg Multiple N/A
636-489 Chesterfield Multiple N/A
636-492 Fenton Multiple N/A
636-493 St Charles Multiple N/A
636-495 High Ridge Multiple 8/19/2013
636-496 Fenton Multiple 10/10/2008
636-497 Wentzville Multiple N/A
636-498 Harvester Multiple N/A
636-500-XXXX --- 636-597-XXXX
NPANXX Area served[1] Provider[2] Date[3]
636-500 Imperial Onvoy N/A
636-515 O'Fallon Multiple 1/27/2014
636-517 Valley Park Multiple 7/5/2001
636-519 Chesterfield Southwestern Bell N/A
636-524 Festus-Crystal City Multiple 3/13/2002
636-525 Imperial Multiple 7/5/2001
636-527 Manchester Southwestern Bell N/A
636-528 Troy Brightspeed Of Missouri N/A
636-529 Valley Park Multiple N/A
636-530 Chesterfield Southwestern Bell N/A
636-532 Chesterfield Southwestern Bell N/A
636-533 Fenton MCIMetro Access Transmission Services N/A
636-534 Chesterfield Multiple N/A
636-535 Festus-Crystal City Multiple 11/10/2014
636-536 Chesterfield Multiple N/A
636-537 Chesterfield Southwestern Bell N/A
636-538 Wentzville Multiple N/A
636-541 St Charles Multiple 6/8/2001
636-542 O'Fallon Multiple 6/19/2007
636-543 Festus-Crystal City Multiple 7/8/2009
636-544 O'Fallon New Cingular Wireless PCS 3/20/2002
636-547 Imperial Multiple N/A
636-548 Maxville Multiple N/A
636-549 Eureka Multiple N/A
636-551 Cedar Hill Multiple 3/17/2014
636-552 Manchester Multiple N/A
636-556 Valley Park Multiple N/A
636-557 Manchester Multiple N/A
636-561 Dardenne Brightspeed Of Missouri N/A
636-565 De Soto Multiple 2/27/2002
636-566 Winfield Multiple N/A
636-573 St Charles MCIMetro Access Transmission Services N/A
636-574 St Charles American Messaging Services N/A
636-575 High Ridge New Cingular Wireless PCS 11/12/2001
636-577 St Peters Multiple 3/20/2002
636-578 St Charles Multiple 2/2/2001
636-579 Chesterfield T-Mobile USA 1/26/2001
636-582 Union Multiple 6/5/2008
636-583 Union Southwestern Bell N/A
636-584 Union Multiple N/A
636-585 High Hill Multiple N/A
636-586 De Soto Southwestern Bell N/A
636-587 Eureka Multiple N/A
636-589 Warrenton Multiple 11/15/2022
636-590 Chesterfield Multiple N/A
636-591 Manchester Multiple N/A
636-594 Manchester Multiple N/A
636-597 Truxton Multiple N/A
636-600-XXXX --- 636-699-XXXX
NPANXX Area served[1] Provider[2] Date[3]
636-600 Fenton Multiple N/A
636-614 O'Fallon Multiple 10/8/2001
636-622 Troy Multiple N/A
636-625 Dardenne Brightspeed Of Missouri N/A
636-626 St Peters Multiple 9/6/2018
636-627 St Charles Multiple 6/7/2002
636-628 Manchester Multiple N/A
636-629 St Clair Southwestern Bell N/A
636-630 O'Fallon Multiple 5/19/2022
636-633 Imperial Multiple 5/7/2001
636-634 St Charles Multiple N/A
636-635 Cedar Hill Multiple 6/4/2021
636-637 Festus-Crystal City Multiple 9/3/2019
636-638 Festus-Crystal City Multiple 5/22/2012
636-639 Wentzville Multiple N/A
636-642 Imperial Multiple N/A
636-648 Portage Des Sioux Multiple N/A
636-649 Union Multiple 10/27/2011
636-651 Fenton Multiple N/A
636-655 Wentzville Multiple 9/8/2021
636-660 Fenton Multiple 8/13/2002
636-661 Old Monroe Multiple N/A
636-662 Foley Multiple N/A
636-665 Old Monroe Multiple N/A
636-666 Union Multiple 12/24/2018
636-667 Washington Multiple 1/16/2002
636-668 Winfield Multiple N/A
636-669 St Charles Multiple N/A
636-671 High Ridge Multiple N/A
636-673 Foristell Multiple N/A
636-674 Antonia Multiple N/A
636-675 Chesterfield T-Mobile USA 1/18/2001
636-677 High Ridge Southwestern Bell N/A
636-678 Fenton Multiple N/A
636-679 Wentzville Multiple N/A
636-680 Fenton Multiple N/A
636-681 Chesterfield Multiple N/A
636-685 Harvester Multiple N/A
636-686 Manchester Multiple N/A
636-688 St Charles Multiple N/A
636-689 Valley Park Multiple N/A
636-692 High Ridge Multiple N/A
636-695 Dardenne Multiple N/A
636-696 O'Fallon Multiple N/A
636-697 St Peters Multiple N/A
636-698 Wentzville Multiple N/A
636-699 St Charles Multiple N/A
636-706-XXXX --- 636-798-XXXX
NPANXX Area served[1] Provider[2] Date[3]
636-706 St Peters Multiple 9/20/2013
636-707 Cedar Hill Multiple 12/7/2004
636-717 Fenton Multiple N/A
636-720 Harvester Multiple N/A
636-722 Harvester Southwestern Bell N/A
636-723 St Charles Multiple N/A
636-724 St Charles Southwestern Bell N/A
636-725 Festus-Crystal City Multiple 4/18/2011
636-728 Chesterfield Multiple N/A
636-730 Chesterfield Multiple N/A
636-732 Gray Summit Multiple 10/24/2019
636-733 Chesterfield Multiple N/A
636-734 St Charles Multiple N/A
636-735 Chesterfield Multiple N/A
636-736 Chesterfield Multiple N/A
636-737 Chesterfield Southwestern Bell N/A
636-741 Imperial Multiple N/A
636-742 Gray Summit Multiple N/A
636-744 Union Multiple 3/28/2006
636-745 Wright City Multiple N/A
636-746 Maxville Multiple 2/4/2022
636-747 Pacific Multiple 1/5/2016
636-748 Cedar Hill Multiple 3/5/2007
636-751 Manchester Cellco Partnership N/A
636-753 Portage Des Sioux Multiple N/A
636-754 St Charles MCIMetro Access Transmission Services N/A
636-755 Dardenne Multiple 1/20/2005
636-757 St Charles Multiple N/A
636-758 St Clair Multiple 10/25/2019
636-764 Fenton Multiple N/A
636-773 St Charles Onvoy 4/9/2004
636-775 Troy Multiple 2/7/2011
636-777 Chesterfield Multiple N/A
636-778 Chesterfield Multiple N/A
636-779 Manchester Multiple N/A
636-782 Holstein Multiple 1/10/2007
636-787 Chesterfield MCIMetro Access Transmission Services N/A
636-789 Hillsboro Multiple N/A
636-791 Wright City Multiple 1/10/2007
636-793 Harvester Multiple N/A
636-794 Harvester MCIMetro Access Transmission Services N/A
636-795 St Charles New Cingular Wireless PCS N/A
636-797 Hillsboro Multiple N/A
636-798 Defiance Multiple N/A
636-800-XXXX --- 636-899-XXXX
NPANXX Area served[1] Provider[2] Date[3]
636-800 St Charles Multiple 10/14/2015
636-812 Chesterfield Multiple N/A
636-821 Pond Multiple N/A
636-825 Valley Park Multiple N/A
636-827 Valley Park Southwestern Bell N/A
636-828 New Melle Multiple N/A
636-829 High Ridge Multiple 2/6/2019
636-837 Herculaneum-Pevely Multiple 12/22/2020
636-841 Wentzville Multiple N/A
636-849 O'Fallon Multiple 4/6/2017
636-851 Harvester Multiple 7/5/2001
636-856 Wentzville Multiple 1/23/2008
636-861 Valley Park Southwestern Bell N/A
636-865 Hillsboro Multiple 3/24/2017
636-866 St Charles Multiple N/A
636-867 Jonesburg Multiple 1/11/2022
636-874 O'Fallon Multiple 2/17/2022
636-875 St Peters Multiple 7/6/2007
636-887 Wentzville Multiple 12/13/2004
636-888 St Clair Multiple 1/21/2014
636-891 Manchester Multiple N/A
636-893 Manchester Multiple N/A
636-896 St Charles Multiple N/A
636-898 Chesterfield Multiple N/A
636-899 Portage Des Sioux Multiple N/A
636-900-XXXX --- 636-999-XXXX
NPANXX Area served[1] Provider[2] Date[3]
636-900 Washington Multiple 10/14/2015
636-916 St Charles Southwestern Bell N/A
636-922 Harvester Multiple N/A
636-923 Valley Park Multiple N/A
636-925 St Charles Multiple N/A
636-926 Harvester Multiple N/A
636-928 Harvester Southwestern Bell N/A
636-931 Festus-Crystal City Multiple N/A
636-932 Holstein Multiple N/A
636-933 Festus-Crystal City Multiple N/A
636-936 Harvester Multiple N/A
636-937 Festus-Crystal City Southwestern Bell N/A
636-938 Eureka Multiple N/A
636-939 Harvester Multiple N/A
636-940 St Charles Southwestern Bell N/A
636-942 Antonia Multiple N/A
636-944 Ware Multiple N/A
636-946 St Charles Southwestern Bell N/A
636-947 St Charles Southwestern Bell N/A
636-948 Antonia Multiple N/A
636-949 St Charles Southwestern Bell N/A
636-970 St Peters Multiple N/A
636-978 O'Fallon Brightspeed Of Missouri N/A
636-980 O'Fallon Multiple N/A
636-987 Defiance Multiple N/A
636-999 Pacific Multiple 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. A single provider refers to the original company controlling a whole NPA-NXX block (10,000 phone numbers). With Number Pooling, NPA-NXX blocks can be split into ten 1,000 phone number blocks and handed over to other service providers (available in the USA and Puerto Rico).
  3. Assignment date. N/A: unavailable date or central office code assigned before 2001.
  4. NXX prefixes last updated: February 13, 2026

Cities in area code 636

City1 County Time zone1
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 (currently ).
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