Talk to Gabi

MARYLAND · AREA CODE GUIDE

301 area code location: Frederick and Gaithersburg, Maryland

Local date and time
Eastern Time
PennsylvaniaVirginiaWest Virginia301FrederickGaithersburgHagerstownCumberland

301 area code: MarylandCities marked: Frederick, Gaithersburg, Hagerstown, Cumberland.Boundaries are approximate; area codes don't always follow city or county lines. Map data: the Homeland Security Infrastructure Program (HSIP, 2010) and the North American Numbering Plan Administrator (NANPA), checked 26 September 2026; US Census Bureau.
301 area code: Maryland

Download the 301 area code map

A printable area code 301 location map, with time zone and state. Use the PNG image in a document or slide; the SVG stays sharp at any size.

Download PNG 1600 × 1396Download SVG

301 area code at a glance

Country and calling code
United States (+1)
In service since
New code planned
No, as of 22 September 2026

An area code does not show where a caller is now.

Sources: NANPA area code listing, NANPA places by area code. Checked .

History

  1. : 410 split from 301
  2. : 240 added as an overlay on 301
  3. : 227 added as an overlay on 301

Time zone

Eastern Time
Standard time UTC−05:00
Daylight saving time UTC−04:00

Where 301 reaches

301 numbers are issued across 51 communities. These are telephone exchange areas, which follow the phone network rather than city limits, so a place can sit just outside the boundary of the town it is named for.

  • Frederick
  • Gaithersburg
  • Hagerstown
  • Cumberland
  • La Plata
  • Mount Airy
  • Brunswick
  • Frostburg
  • Walkersville
  • Thurmont
  • Poolesville
  • Middletown
  • Leonardtown
  • Indian Head
  • Smithsburg
  • Emmitsburg
  • Williamsport
  • Myersville
  • Oakland
  • Westernport
  • New Market
  • Hancock
  • Keedysville
  • Lonaconing
  • Grantsville
26 more communities
  • Friendsville
  • Clear Spring
  • Kitzmiller
  • Ashton 236
  • Ashton 238
  • Bittinger
  • Brandywine
  • Buckeystown
  • Damascus 236
  • Damascus 240
  • Flintstone
  • Highfield
  • Hughesville
  • Laurel 236
  • Laurel 238
  • Lexington Park Great Mills
  • McCoole
  • Mechanicsville
  • Mount Savage
  • Nanjemoy
  • Ridge
  • Tompkinsville
  • Waldorf
  • Washington
  • Washington 236
  • Washington 238

Notable places in 301

PlaceWhereWhat it is
University of Maryland28.2 km from GaithersburgUniversity, 44,110 12-month enrollment (2023–24)
Camp David5.7 km from ThurmontMilitary base
Northwest Stadium25.1 km from BrandywineStadium
Joint Base Andrews14.3 km from BrandywineUS Air Force installation
Fort Detrick1.4 km from FrederickUS Army installation
Bowie State University39.3 km from BrandywineUniversity, 7,274 12-month enrollment (2023–24)
Six Flags America26.7 km from BrandywineAmusement park
College Park Airport30.1 km from GaithersburgAirport
Capital Centre24.6 km from BrandywineArena
Uniformed Services University of the Health Sciences18.9 km from GaithersburgUniversity

Also serving this area

Questions about 301

Where is the 301 area code?

301 is in Maryland. Its numbers are issued in Frederick, Gaithersburg, Hagerstown, and 48 other communities.

What time zone is area code 301 in?

301 is in Eastern Time. Daylight saving time is observed.

Does 301 have an overlay?

Yes. 240 was added as an overlay on 301 on 1 June 1997. 227 was added as an overlay on 301 on 14 June 2023.

Business phone numbers in area code 301, answered by an AI agent

A local number for Frederick, Gaithersburg, and Hagerstown, Maryland, with an AI receptionist that takes caller details, answers the questions you give it, and books appointments. Numbers depend on what carriers have left.

Build a 301 phone agentHow it works