Caller ID for
Area code 636
Area code 636 St. Charles, Missouri
Area code 636 is in Missouri, with numbers assigned in St. Charles, Chesterfield, Manchester and 34 more places. It’s 11:14 PM there now.
- State
- Missouri9 area codes in Missouri
- Time zone
- Central11:14 PM there now
- Exchanges
- 43537 places
- Overlay
- NoneThe only code for its area
- No sign-up
- We never contact the number
- Spam risk included
Looking up the caller ID…
Caller ID names come from phone carrier records and are often outdated or missing. Our full report matches about 86% of numbers to TransUnion® credit data, with their FICO® Score 4.
See who’s behind this number
The full report: the owner, their address and a real FICO® Score 4.
A full report shows the owner, their address, FICO Score 4 and credit profile. The preview here is blurred sample text.
$1 today · 7-day Platinum trial, then $59/month · cancel anytime
Full reports include credit data, so you’ll confirm a permissible purpose first, like the person’s consent or their application. Caller ID doesn’t need one.
Free lookups come back in
00h00m00s
Get 100+ lookups a month
Or try Platinum: $1 for 7 days, then $59/month · cancel anytime
Where area code 636 is
Numbers in 636 are assigned to 37 places in 8 counties: St. Charles County, St. Louis County, Jefferson County, Franklin County, Lincoln County, Warren County, plus 2 more.
No single place dominates: St. Charles, the largest, has 10% of the exchanges.
- St. Charles44
- Chesterfield36
- Manchester27
- O'Fallon24
- Fenton16
- St. Peters15
- Valley Park14
- Wentzville14
- Washington13
- Union12
- High Ridge11
- Troy11
- Warrenton10
- Imperial10
- Cedar Hill8
- De Soto7
- Pacific6
- Dardenne Prairie6
- St. Clair6
- Eureka6
- Foristell5
- Gray Summit5
- Hillsboro5
- Winfield4
Phone companies in 636
435 blocks of numbers in 636 are held by 29 phone companies. The most belong to AT&T (110), Brightspeed (49) and T-Mobile (38).
A mix: about 20% wireless, 42% local phone and cable and 38% other carriers, including internet phone services.
A block’s holder is the company it was first assigned to; numbers can move to other carriers since.
History and overlays
636 went into service in 1999, added to the area of 314.
50 new exchanges were assigned since 2021, the latest in September 2026.
Calling 636
It’s 11:14 PM Central time in 636 right now.
From elsewhere in the U.S., dial 1, 636 and the 7-digit number.
Nearby area codes
Missouri has 9 area codes: 235, 314, 417, 557, 573, 636, 660, 816 and 975.
- 314 · St. Louis, MO · about 18 mi
- 557 · St. Louis, MO · about 19 mi
- 573 · Columbia, MO · about 50 mi
- 235 · Birch Tree, MO · about 71 mi
- 618 · Collinsville, IL · about 73 mi
- 730 · Centralia, IL · about 84 mi
From the North American Numbering Plan Administrator’s area code and exchange records (10/22/2026) and U.S. Census place and county names. Places and companies are where number blocks were assigned, not where anyone lives or which carrier a number uses today.
Map of the 636 area code
Map of the 636 area code around St. Charles, Chesterfield and Manchester, Missouri.
Cities on the map
More than three a day
Every plan includes caller ID lookups.
Caller ID and carrier lookups every month, plus full reports with the owner, their address and a real FICO® Score 4.
Basic
$29a month
Try it: $1 for 1 day
- 100 caller ID & carrier lookups a month
- 3 full reports a month
- Owner, address and FICO® Score 4
- Or $99 a year
$1 today, then $29/month after 1 day · cancel anytime
Most lookups
Platinum
$59a month
Try it: $1 for 7 days
- 1,000 caller ID & carrier lookups a month
- 5 full reports a month
- Owner, address and FICO® Score 4
- Or $199 a year
$1 today, then $59/month after 7 days · cancel anytime
Just one report
$19.99one time
No subscription
- Who the number belongs to
- Current address
- FICO® Score 4 and credit profile
$19.99 once · nothing to cancel
You pick a plan after looking up a number. Full reports need a permissible purpose, like the person’s consent. Caller ID lookups past a plan’s monthly amount are 5¢ each; during a trial, up to 10 are included.
Questions about 636
Where is area code 636?
In Missouri, covering St. Charles, Chesterfield and Manchester and other places across 8 counties.
What time zone is 636 in?
Central time. It was 11:14 PM there when this page loaded.
Is 636 an overlay?
No. 636 is the only area code for its area right now.
Which phone companies have 636 numbers?
29 companies hold blocks; the most belong to AT&T, Brightspeed and T-Mobile. About 20% of blocks are wireless.
Is 636 running out of numbers?
Not on record. 50 new exchanges have been assigned since 2021.