Area code 636
Get a 636 phone number
To get a 636 phone number, pick an available 636 number below and sign up for AvoCall. Your new number works for calls and texts on the phone you already own over WiFi or data. Current web pricing is verified at checkout. No second SIM and no new device are required.
- Location
- St. Louis, MO, Missouri
- Time zone
- Central (GMT -6)
- Related area codes
- Related:314
The 636 area code covers St. Louis, MO and nearby Missouri communities.
About the 636 area code
St. Louis anchors the Missouri region assigned area code 636, which serves O'Fallon, St. Peters, Chesterfield, Wildwood, and Wentzville, with clocks set to Central time.
The code was switched on in 1999, taking over territory that had belonged to area code 314. Nothing has been layered over it and nothing further has been carved from it, so it remains a standalone code with the shape it had at launch.
Dialing note: 636 was carved out of the 314 territory and went into service in 1999.
Numbering details on this page (service dates and overlay status) are checked against the NANPA numbering registry. Registry data as of 07/16/2026.
636 phone number FAQ
- How do I get a 636 phone number?
- Pick an available 636 number and sign up for AvoCall. Your new St. Louis, MO number works for calls and texts on your existing phone over WiFi or data. Current web pricing is verified at checkout. There is no second SIM and no new device.
- Where is the 636 area code?
- It serves St. Louis, MO and nearby cities in Missouri, including O'Fallon, St. Peters, Chesterfield.
- Can I receive verification codes on a 636 number?
- AvoCall 636 numbers support calling and messaging. Verification-text compatibility varies by sender; short-code and 2FA delivery is not guaranteed.