Area Code 636: St. Louis suburbs, Missouri
636 is a telephone area code serving Missouri, including St. Louis suburbs. It is part of the North American Numbering Plan and is dialed with the country code +1.
Numbers beginning with 636 are located in Missouri, United States (NANP region: East). The code covers St. Louis suburbs.
How to Dial Area Code 636
| Calling from | What to dial |
|---|---|
| Anywhere in the US or Canada | 1 636 XXX-XXXX (10-digit dialing: 636 + 7-digit number) |
| Local call inside the same area code | 7-digit number in most areas; 10 digits where an overlay code is active |
| From the UK or Europe | 00 1 636 XXX XXXX |
| From Australia | 0011 1 636 XXX XXXX |
| From a mobile phone anywhere | +1 636 XXX XXXX |
Whatever country you are calling from, the + symbol replaces the exit code. Save the contact as +1 636 XXXXXXX and it will dial correctly from any phone in the world.
Time Zone for Area Code 636
Calls to a 636 number ring in the America/Chicago time zone, standard offset UTC-06:00. Daylight saving time applies here, so the offset moves forward one hour from March to November.
Cities and Communities Served by 636
The following places fall inside the 636 calling area:
Other Area Codes in Missouri
These codes also serve Missouri. Area codes are assigned by the North American Numbering Plan Administration (NANPA).
| Area Code | Cities / Coverage |
|---|---|
| 314 | St. Louis |
| 417 | Springfield, Joplin |
| 573 | Columbia, Jefferson City |
| 660 | Kirksville, Sedalia |
| 816 | Kansas City |
| 975 | Kansas City (overlay) |
See all 7 area codes in Missouri →
Frequently Asked Questions
Where is area code 636?
Area code 636 is in Missouri, United States. It covers St. Louis suburbs.
What time zone is area code 636 in?
Area code 636 rings in the America/Chicago time zone (UTC-06:00 standard).
Do I need to dial 1 before area code 636?
Yes, for a long-distance call inside the US and Canada you dial 1 first, then 636, then the seven-digit number. The 1 is the North American long-distance trunk prefix — it is not the country code. From outside North America you dial your exit code then 1 then 636.
Is area code 636 toll-free?
No. 636 is a standard geographic area code, so normal long-distance rates apply unless your plan includes them. Toll-free NANP codes are 800, 833, 844, 855, 866, 877 and 888.