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Area code 636

Area code 636 serves Missouri, including Saint Charles, Chesterfield and Harvester (Central time). It has been in service since May 22, 1999.

Numbers starting with 636 drew 952 reports to the FTC from Aug 14, 2026 to Nov 11, 2026 and 667 complaints to the FCC since November 2023. The number on your screen can be faked, so a 636 number proves nothing about where a call came from.

Location
MissouriSt. Louis, MO-IL Metropolitan Statistical Area
Time zone
Central
In service since
May 22, 1999Created from 314
Overlay
None: the only code for its area
Local calls
Dial 7 digits
Exchanges in use
435 of 792held by 31 carriers
Projected to run out
3Q 2076NANPA forecast 2026.2

Complaints about 636 numbers

Reports where the number on the consumer's caller ID (or, for the FCC, the number the caller asked them to call back) starts with 636. These are counts of what people reported; the agencies do not verify them.

FTC reports, Aug 14, 2026 to Nov 11, 2026

952

FCC complaints since November 2023

667

Different 636 numbers reported

1,496

FCC complaints naming a 636 number, by month

November 2023 to October 2026. Source: FCC Consumer Complaints Data.

Show as a table
MonthComplaints
November 202312
December 20238
January 202414
February 20247
March 20245
April 202418
May 202412
June 20247
July 202416
August 202411
September 202412
October 202442
November 202440
December 202422
January 202539
February 202542
March 202575
April 202562
May 202560
June 202517
July 20257
August 20258
September 202512
October 20250
November 20254
December 20259
January 20266
February 20267
March 20264
April 202615
May 20268
June 202613
July 20267
August 20269
September 202613
October 202616

What people said 636 calls were about

Subjects picked in FTC reports, August 14, 2026 to November 11, 2026. 469 of 952 reports were robocalls.

Show as a table
SubjectReports
Other475
Calls pretending to be government, businesses, or family and friends113
Medical and prescriptions82
Reducing your debt (credit cards, mortgage, student loans)75
Dropped call or no message66
Home improvement and cleaning41

Places served by 636

NANPA lists 46 rate centers for 636. A rate center is the town or district a block of numbers is tied to for billing; sorted here by how many exchanges each holds.
  • Saint Charles44
  • Chesterfield36
  • Harvester36
  • Manchester27
  • O'fallon24
  • Fenton16
  • Festus Crystal City16
  • Saint Peters15
  • Valley Park14
  • Wentzville14
  • Maxville13
  • Washington13
  • Union12
  • High Ridge11
  • Troy11
  • Imperial10
  • Warrenton10
  • Cedar Hill8
  • De Soto7
  • Pond7
  • Portage Des Sioux7
  • Antonia6
  • Dardenne6
  • Eureka6
Show all 46 rate centers

Pacific, Saint Clair, Foristell, Gray Summit, Herculaneum-Pevely, Hillsboro, Winfield, Ware, Wright City, Augusta, Defiance, Foley, Hawk Point, Holstein, Jonesburg, Marthasville, Moscow Mills, New Melle, Old Monroe, Orchard Farm, High Hill, Truxton.

Phone companies holding 636 exchanges

Each exchange (the three digits after the area code) is assigned to one carrier. 84% of these exchanges are pooled: their numbers are handed out in blocks of 1,000 to other carriers, so the holder below is not always the company serving a given number.

Exchanges held, top 8 of 31 carriers

NANPA central office code assignments, file of November 11, 2026.

Show as a table
Carrier (legal name)Exchanges
Southwestern Bell110
Brightspeed of Missouri, LLC49
Onvoy, LLC - MO36
T-Mobile USA, Inc.35
Level 3 Communications, LLC - MO29
New Cingular Wireless PCS, LLC - IL29
Mcimetro Access Transmission Services LLC - MO28
Paetec Itel, LLC25

When today's 636 exchanges were assigned

Exchanges still assigned, by year of assignment. Exchanges returned since are not counted.

Show as a table
YearExchanges
200127
200226
20034
20043
20053
20066
20076
20085
20091
20101
20115
20122
20134
20148
20156
20165
20174
20183
20195
20208
202112
202210
20232
202414
20256
20266

Check a 636 number

A check shows the carrier and rate center of the number's exchange and every FTC and FCC report about that exact number. Why the number on screen can be fake.

Other area codes in Missouri

NANPA area code database and central office code file of November 11, 2026; FCC complaints November 1, 2023 to November 11, 2026; FTC reports August 14, 2026 to November 11, 2026. How the data is used.

Official sources (7)Show