301 area code
The 301 area code covers western Maryland, including the Maryland suburbs of Washington, D.C.. Main cities include Silver Spring, Bethesda, Rockville, Gaithersburg, Frederick and Hagerstown.
- State
- Maryland
- Main cities
- Silver Spring, Bethesda, Rockville, Gaithersburg, Frederick, Hagerstown
- Time zone
- Eastern Time
- Same area as
- 227, 240
- In service since
- 1947
- Local calls
- 10 digits
Get a free 301 number for your business
Pick 301 when you set up your number and Scheduley gives your business a local Silver Spring number for calls and texts, answered 24/7 by an AI receptionist that books appointments and jobs. The number is free. AI calls are $2 a minute after your 10 welcome minutes.
Get a 301 number free- Pick your area code
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Where is the 301 area code?
Area code 301 covers western Maryland, including the Maryland suburbs of Washington, D.C., including Silver Spring, Bethesda, Rockville, Gaithersburg, Frederick and Hagerstown. It went into service in 1947, as one of the original North American area codes. It shares the same area with 227 and 240, so new local numbers there can get any of these codes. Local calls need all 10 digits.
Got a call from a 301 number?
A 301 number was first given out in the Silver Spring area. Area codes show where a number was assigned, not where the caller is today, and spam callers can fake any number. If you don’t know the caller, let it go to voicemail or look up the full number before you call back.
301 area code FAQ
Where is the 301 area code?
301 covers western Maryland, including the Maryland suburbs of Washington, D.C., including Silver Spring, Bethesda, Rockville, Gaithersburg, Frederick and Hagerstown.
What time zone is area code 301?
Area code 301 is on Eastern Time.
What other area codes cover the same area as 301?
227 and 240. They’re overlay codes for the same area, so a local number there can have any of them.
Can I get a free 301 business phone number?
Yes. Pick 301 when you set up your Scheduley number and it gets a local number for you, if one is available. The number is free, and an AI receptionist can answer it 24/7 and book appointments.