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AREA CODE · MISSOURI

Area code 636

Area code 636 covers St Charles, Missouri. Map, time zone, overlays, carriers, the full list of prefixes and how to dial it.

State: Missouri Major City: St Charles Central Time (CT) Overlay: None
01 / WHERE IT IS

Where is area code 636?

Area code 636 is assigned to St Charles and the surrounding region in Missouri. Calls to numbers that start with 636 are routed to this area.

Area code 636 is not currently part of an overlay: it serves its territory on its own.

Counties covered

St. Charles CountySt. Louis CountyJefferson CountyFranklin CountyLincoln CountyWarren County

Line types

  • Mobile 20.75%
  • Landline 79.25%
02 / MAP

Area code 636 on the map

The shaded area joins the code’s numbering centers; the marker shows its main city.

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© OpenStreetMap contributors

03 / LOCAL TIME

Current time in St Charles

This area code is in the Central Time (CT) time zone.

Local timeSt Charles, MO--:--:--

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America/ChicagoLive
04 / HOW TO DIAL

How to call St Charles

WITHIN THE US636 XXX XXXX

Always 10 digits — landline, mobile or VoIP. Local, long distance or a different state: the format is always the same. You do not need to dial the 1 first.

FROM ABROAD+1 636 XXX XXXX

Exit codes: 00 Europe/Mexico · 011 Canada · 010 Japan · + universal

WHATSAPP / IMESSAGE+1 636 XXX XXXX

Always save the number in international format so messaging apps recognize it correctly:

Call typeTraditional landlineMobile / VoIP
Local (same area code)10 digits10 digits
US long distance1 + 10 digits10 digits
Emergency911911
🌐Universal+1 636 555 0123
🇪🇸🇲🇽Spain / Mexico00 1 636 555 0123
🇦🇺Australia0011 1 636 555 0123
🇯🇵Japan010 1 636 555 0123
HAVE THE FULL NUMBER?

Learn more about that number.

Check the line type and the carrier the number block was originally assigned to.

10 digits to see the carrier and line type of the number

05 / CARRIERS

Carriers in area code 636

Share of the number blocks by carrier and line type.

Landline

AT&T
38%
Brightspeed
14%
Sinch
10%
Lumen Technologies
9%
Verizon Business
8%
Others
21%

Mobile

T-MOBILE USA
38%
AT&T Mobility
33%
Verizon Wireless
22%
USA Mobility
3%
Boost Mobile
2%
Others
1%

Carrier shown is the original assignment of each number block and may differ today because of number portability.

06 / PREFIXES

Complete list of prefixes for area code 636

429 number blocks (NXX) assigned in this area code.

PrefixTypeCityCarrier
(636) 200 Landline Manchester SinchONVOY, LLC - MO
(636) 201 Mobile Warrenton AT&T MobilityNEW CINGULAR WIRELESS PCS, LLC - IL
(636) 202 Landline Warrenton Verizon BusinessMCIMETRO ACCESS TRANSMISSION SERVICES LLC - MO
(636) 203 Landline Fenton Verizon BusinessMCIMETRO ACCESS TRANSMISSION SERVICES LLC - MO
(636) 204 Landline Warrenton SinchONVOY, LLC - MO
(636) 205 Landline Winfield Lumen TechnologiesLEVEL 3 COMMUNICATIONS, LLC - MO
(636) 206 Landline St Charles AT&TAT&T CORP.
(636) 207 Landline Manchester MCA3 AT&TSOUTHWESTERN BELL
(636) 208 Mobile Festus-Crystal City AT&T MobilityNEW CINGULAR WIRELESS PCS, LLC - IL
(636) 209 Mobile Festus-Crystal City Verizon WirelessCELLCO PARTNERSHIP DBA VERIZON WIRELESS - MO

Showing 10 of 429 prefixes

07 / FAQ

Frequently asked questions about area code 636

Where is area code 636 used?
Area code 636 serves St Charles and the surrounding area in Missouri, including St. Charles County, St. Louis County, Jefferson County, Franklin County, Lincoln County.
What city is area code 636 from?
The main city of area code 636 is St Charles, MO.
What time zone is area code 636 in?
Area code 636 is in the Central Time (CT) time zone (America/Chicago).
Is 636 an overlay area code?
No. Area code 636 is not currently part of an overlay.
How do I call a number with area code 636 from the United States?
Dial the 10 digits: 636 + 7-digit number. For some long-distance calls from a landline you may need to add a 1 first.
How do I call a 636 number from another country?
Dial your country's exit code (or +), then 1, then 636 and the seven-digit number. From a mobile you can use +1 636 XXX XXXX.
Which carriers use area code 636?
Most landline blocks belong to AT&T and most mobile blocks to T-MOBILE USA. The carrier shown is the original assignment and may differ today because of number portability.
Is area code 636 for landlines, mobiles or both?
Both. About 79.25% of the number blocks are landline, 20.75% mobile.
How do I save a 636 number in WhatsApp or my phone?
Save it in international format: +1 636 XXX XXXX. That way WhatsApp, iMessage and Telegram recognize it from any country.
Is it safe to answer calls from area code 636?
The area code only shows the region a number was assigned to; it does not tell you who is calling. Scammers can fake any area code, so do not share personal or banking information with unknown callers, and let unknown numbers go to voicemail.
KEEP EXPLORING

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Other area codes in Missouri

235 · Birch Tree314 · St Louis417 · Springfield557 · St Louis573 · Columbia660 · Sedalia816 · Kansas City975 · Kansas City

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