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. 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

  • 20601
  • 20602
  • 20603
  • 20604
  • 20606
  • 20607
  • 20608
  • 20609
  • 20611
  • 20612
  • 20613
  • 20616
  • 20617
  • 20618
  • 20619
  • 20620
  • 20621
  • 20622
  • 20623
  • 20624

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