Washington, MO Area Code
Washington, Missouri (population 15,906) uses area code 636.
Carriers with Washington numbers
13 prefixes are assigned to the Washington exchange: 23% mobile, 31% VoIP and cable, 46% landline.
| Carrier | Prefixes |
|---|---|
| AT&T (Southwestern Bell) | 4 |
| Onvoy (Sinch) | 2 |
| Paetec Itel | 1 |
| Verizon Wireless | 1 |
| Lumen (Level 3) | 1 |
| AT&T (Teleport) | 1 |
| AT&T Mobility | 1 |
| Aurora Communications | 1 |
Area codes used in Washington
| Area code | Prefixes serving Washington | Main carriers in this code |
|---|---|---|
| 636 | 13 | AT&T (Southwestern Bell), Brightspeed Of Missouri, Onvoy (Sinch) |
Washington phone number prefixes
Numbers starting with these first six digits were originally assigned to the Washington exchange.
636-221AT&T (Southwestern Bell)636-231Paetec Itel636-239AT&T (Southwestern Bell)636-241Verizon Wireless636-266Lumen (Level 3)636-283AT&T (Teleport)636-291AT&T Mobility636-369Onvoy (Sinch)636-390AT&T (Southwestern Bell)636-392Aurora Communications636-432AT&T (Southwestern Bell)636-667T-Mobile636-900Onvoy (Sinch)
Nearby cities in area code 636
- O'Fallon
- St. Charles
- St. Peters
- Florissant
- Wentzville
- Chesterfield
- Wildwood
- Ballwin
- Hazelwood
- Old Jamestown
- Warrensburg
- Lake St. Louis
Questions
- What is the area code for Washington, MO?
- The area code for Washington, Missouri is 636.
- What time zone is Washington in?
- Washington is in the Central time zone.