821 Area Code Information
State: TX
Largest City in Area: HOUSTON
Where is Area Code 821? Area code (821) is in the state of TX. Below, are the major cities in the area code (821).
Major Cities in 821
- HOUSTON, TX (191)
- SALINAS, CA (41)
- EVANSVILLE, IN (38)
- SPRING, TX (38)
- SANTA CRUZ, CA (35)
- HUMBLE, TX (29)
- KATY, TX (26)
- CHICAGO, IL (25)
- APO, AE (22)
- NEW YORK, NY (22)
Zip Codes in 821