MARYLAND · AREA CODE GUIDE
227, 240, and 301 area codes location: Frederick, Maryland
- Local date and time
- Eastern Time
Map data: UCLA Geoportal (2015) · NANPA · US Census Bureau, checked 26 September 2026. Boundaries are approximate.
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Download the 240 area code map
227, 240, and 301 area codes at a glance
- State
- Maryland
- Primary cities
- Frederick, Gaithersburg, and Hagerstown
- Time zone
- Eastern Time
- Answering calls
- Rules for answering calls in Maryland
An area code does not show where a caller is now.
| Area code | Started service | Parent code | New code planned |
|---|---|---|---|
| 227 | 301 | No, as of 22 September 2026 | |
| 240 | 301 | No, as of 22 September 2026 | |
| 301 | No, as of 22 September 2026 |
History
Counties and cities covered
These are telephone exchange areas, which follow the phone network rather than city limits.
Counties of the communities we could place (the code may reach further): Allegany County, Carroll County, Charles County, Frederick County, Garrett County, Montgomery County, St. Mary's County, and Washington County.
- 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
Sources: NANPA area code listing, NANPA places by area code, U.S. Census Bureau county geography. Checked .
Business phone numbers in area codes 227, 240, and 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.