What area code is 301?
Here's everything about it.
Instant lookup for the 301 area code — location, time zone, cities served, and who's been calling from it. No sign-up, no app.
301 at a glance
Summary
Cities & regions served by 301
Western Maryland4 communities on record for 301.
Where 301 sits on the map
Overlay: 240, 227Coverage area
About the 301 region
301 covers Western Maryland in Maryland, including D.C, Hagerstown, Frederick and Rockville. The code has been in service since 1947 and is one of the original North American area codes.
As the Western Maryland region grew, 301 ran low on available numbers, so 240 and 227 were added as overlay codes over the same geographic area. Both codes are local to each other and 10-digit dialing applies throughout.
Created for all of Maryland; 1991: split to create 410; 1997: overlaid by 240; 2023: overlaid by 227.
Who called me from 301?
Community reports- Caller ID is trivially spoofed: an incoming call that displays 301 does not prove the caller is really in the 301 region or even in the United States.
- Avoid calling back unknown one-ring numbers — some premium-rate scams rely on curiosity callbacks.
- Never share verification codes, payment details, or remote access during an unsolicited call, even if the caller claims to be your bank or a government agency.
- When a 301 call pressures you to act immediately, hang up and contact the organization directly through its official number.
Be the first to add a community report for a 301 number below.
Frequently asked questions
FAQWhat area code is 301?+–
301 is a telephone area code serving Western Maryland in Maryland, United States, in service since 1947.
Where is area code 301 located?+–
It covers Allegany County, Charles County, Garrett County and other counties, including D.C, Hagerstown, Frederick and Rockville in Maryland.
What cities are in area code 301?+–
Major communities on record include D.C, Hagerstown, Frederick and Rockville. The code's territory spans the Western Maryland region of Maryland.
What time zone is 301?+–
301 observes Eastern (ET), which is UTC−5 / −4 DST and follows daylight saving time.
When did area code 301 start?+–
301 entered service in 1947 as one of the original 1947 North American area codes. Its history: created for all of Maryland; 1991: split to create 410; 1997: overlaid by 240; 2023: overlaid by 227.
Why do calls to 301 require 10-digit dialing?+–
301 shares its territory with overlay code 240 and 227. Because both codes serve the same geographic area, the phone network needs all 10 digits to route a call, and calls between the codes are still local.
Is 301 a scam area code?+–
Scam and robocall traffic can use any North American code, 301 included — caller ID is easy to spoof, so the code alone does not tell you who is really calling. Check the community reports on this page before calling back an unknown 301 number, and report anything suspicious.
Can I get a 301 phone number?+–
Yes — most mobile carriers and VoIP providers let you request a 301 number regardless of where you physically live.