301 Area Code Information
State: MD
Largest City in Area: SILVER SPRING
Where is Area Code 301? Area code (301) is in the state of MD. The PeopleSearchNow database has 6,296,724 records on file with a phone number in the area code of (301). Below, are the major cities in the area code (301).
Major Cities in 301
- SILVER SPRING, MD (1,090,831)
- WASHINGTON, DC (778,444)
- ROCKVILLE, MD (636,049)
- GAITHERSBURG, MD (566,826)
- HYATTSVILLE, MD (560,589)
- LAUREL, MD (445,527)
- FREDERICK, MD (428,228)
- BALTIMORE, MD (398,969)
- BOWIE, MD (397,104)
- UPPER MARLBORO, MD (394,559)
Zip Codes in 301
- 20706
- 20743
- 20744
- 20746
- 20747
- 20748
- 20770
- 20772
- 20774
- 20850
- 20852
- 20854
- 20874
- 20878
- 20902
- 20904
- 20906
- 20910
- 21701
- 21740