240 Area code

--:-- EDT

Standard time:	UTC/GMT -5:00 hours
Daylight saving time:	+1:00 hour
Current time zone offset:	UTC/GMT -4:00 hours
Time zone abbreviation:	EDT

DST starts on Sunday 09 March 2025, 02:00
DST ends on Sunday 02 November 2025, 02:00

The 240 area code lies within the Eastern Time (ET)

EST - Eastern Standard Time
EDT - Eastern Daylight Time when daylight saving time is being observed (from early March to early November)

240 Area code location map

Montgomery County

• Germantown
• Silver Spring
• Gaithersburg
• Rockville
• Bethesda
• Wheaton
• Potomac
• Olney
• Takoma Park
• Damascus
• Colesville
• Clarksburg
• Glenmont
• Poolesville
• Ashton

Frederick County

• Frederick
• Thurmont
• Brunswick
• Walkersville
• Middletown
• Emmitsburg

Charles County

• Waldorf
• La Plata
• Hughesville

Prince George's County

• Bowie
• Clinton
• Chillum
• College Park
• Suitland
• Greenbelt
• Camp Springs
• Langley Park
• Hyattsville
• Oxon Hill
• Seabrook
• Beltsville
• Hillcrest Heights
• Glenn Dale
• Brandywine

Washington County

• Hagerstown
• Smithsburg
• Hancock
• Clear Spring

Howard County

• Scaggsville

Allegany County

• Cumberland
• Frostburg
• Westernport
• Flintstone

Carroll County

• Mount Airy

St. Mary's County

• Leonardtown
• Mechanicsville

Garrett County

• Friendsville