866 Area Code Information
State: DC
Largest City in Area: WASHINGTON
Where is Area Code 866? Area code (866) is in the state of DC. The PeopleSearchNow database has 19,086 records on file with a phone number in the area code of (866). Below, are the major cities in the area code (866).
Area Codes Starting with 8
Major Cities in 866
- WASHINGTON, DC (410)
- CHICAGO, IL (394)
- LOS ANGELES, CA (390)
- HOUSTON, TX (376)
- LAS VEGAS, NV (369)
- AUSTIN, TX (353)
- PHOENIX, AZ (350)
- SAN DIEGO, CA (347)
- DALLAS, TX (318)
- ROCHESTER, NY (316)
Zip Codes in 866
- 14623
- 20002
- 20706
- 20770
- 21701
- 21703
- 32084
- 43081
- 43224
- 43229
- 66061
- 66062
- 78704
- 78741
- 78744
- 78745
- 78748
- 92506
- 94536
- 94538