🇺🇸 United States · Missouri

Area code 636

Area code 636 is a telephone area code in Missouri, United States, covering St. Charles, O'Fallon, Fenton, Chesterfield, St. Peters, Wentzville and more. Local time is UTC−6 (UTC−5 in summer). Numbers look like (636) 234-5678, or +1 636 234 5678 from abroad.

State: Missouri
Time zone: Chicago UTC−6 (UTC−5 in summer)
Local time now: –
Dial from abroad: +1 636

Places in area code 636

Cities and towns with telephone exchanges in the 636 area code, most exchanges first.

St. Charles
O'Fallon
Fenton
Chesterfield
St. Peters
Wentzville
Ballwin
Arnold
Festus
Pacific
Cedar Hill
De Soto
High Ridge
Troy
Pevely
Union
Eureka
Hillsboro
Marthasville
Warrenton
Lake Saint Louis
Saint Clair
House Springs
Wright City

How to dial area code 636

Calling from	You dial
Inside the 636 area	636 234 5678 (10 digits)
Elsewhere in the US & Canada	1 636 234 5678
Any mobile phone, anywhere	+1 636 234 5678
UK, Europe, India and most countries	00 1 636 234 5678
Australia	0011 1 636 234 5678

Other area codes in Missouri

235 Missouri 314 St. Louis, Florissant 417 Springfield, Joplin 557 Missouri 573 Columbia, Jefferson City 660 Kirksville, Sedalia 816 Kansas City, Independence 975 Missouri

Area code 636: FAQ

Where is area code 636?

Area code 636 is in Missouri, United States and serves St. Charles, O'Fallon, Fenton, Chesterfield, St. Peters, Wentzville. and other places

What time zone is area code 636 in?

Area code 636 is in the America/Chicago time zone (UTC−6 (UTC−5 in summer)).

How do I call a 636 number from outside the US and Canada?

Dial your exit code (00 in most countries, or + on a mobile), then 1, then 636 and the seven-digit number. Example: +1 636 234 5678.

Is a call from area code 636 a scam?

Area code 636 is a regular North American area code, but caller ID can be spoofed: scammers often show local-looking numbers. Do not call back unknown numbers that ask for money or personal data, and check the number with the phone number validator to see whether it is valid and whether it is a mobile, landline or VoIP number.

Phone number API

Check 636 numbers in your app

numlookupapi checks any phone number worldwide in one request and returns validity, line type, carrier, location and every standard format as JSON.

Read the documentation

100 free requests every month. No credit card required.

GET https://api.numlookupapi.com/v1/validate/+16362345678

{
  "valid": true,
  "number": "12069220880",
  "local_format": "2069220880",
  "international_format": "+12069220880",
  "country_prefix": "+1",
  "country_code": "US",
  "country_name": "United States of America",
  "location": "Seattle",
  "line_type": "landline",
  "e164_format": "+12069220880",
  "national_format": "(206) 922-0880"
}