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Area Code 240

Where does the 240 area code belong?

STATE
Maryland
TIME ZONE
Eastern Time
MAJOR CITY
Gaithersburg

The 240 Area Code (or Area Code 240) is located in the state of MD. Area Code 240 is one of the 269 3-digit telephone area codes in the USA. It covers roughly 765 thousand unique phone numbers and 1.62 million individuals near the city of Bethesda

Area Code 240 History

Area code 240 was put into service. Area code 240 is an overlay of area code 301.

Following cities also use area code 240:

Adamstown, Ashton, Baltimore, Beltsville, Bethesda, Brandywine, Cabin John, Callaway, Capitol Heights, Chevy Chase, Clarksville, Clinton, College Park, Columbia, Crofton, Cumberland, Damascus, Emmitsburg, Frederick, Frostburg, Gaithersburg, Glenn Dale, Grantsville, Greenbelt, Hagerstown, Hancock, Highfield, Hughesville, Hyattsville, Ijamsville, Indian Head, Kensington, La Plata, Laurel, Leonardtown, Lexington Park, Mccoole, Mechanicsville, Middletown, Mount Airy, Mount Rainier, Myersville, Nanjemoy, Newburg, Oakland, Odenton, Oxon Hill, Poolesville, Ridge, Rockville, Sandy Spring, Silver Spring, Smithsburg, Tall Timbers, Temple Hills, Thurmont, Upper Marlboro, Waldorf, Williamsport.

ZIP codes in Area Code 240:

20588 (Dhs)
20601 (Waldorf)
20602 (Waldorf)
20603 (Waldorf)
20604 (Waldorf)
20610 (Barstow)
20611 (Bel Alton)
20612 (Benedict)
20615 (Broomes Island)
20616 (Bryans Road)

Big city in area code 240

Silver Spring

COUNTY
Montgomery
POPULATION
291,576
Gaithersburg

COUNTY
Montgomery
POPULATION
139,916
Rockville

COUNTY
Montgomery
POPULATION
134,991
Source: WorldAtlas.com
NUMBER OF PREFIXES
645
NUMBER OF CELLPHONES
383,737
NUMBER OF LAND LINES
172,793
MEDIAN HOME VALUE
$1.87M
MEDIAN INCOME
$229K
Source: WorldAtlas.com

Browse Area Code (240) Prefixes

PREFIX COUNTY CITY CARRIER TYPE
240-423 Montgomery Silver Spring Omnipoint Communications Cap Operations, Llc Wireless
240-424 Montgomery Mount Rainier Sprint Spectrum L.p. Wireless
240-425 Montgomery Cabin John Dslnet Communications Va, Inc. - MD Landline
240-426 Montgomery Bethesda Sprint Spectrum L.p. Wireless
240-427 Charles Waldorf Xo Maryland, Llc Landline
240-428 Montgomery Rockville Bandwidth.com Clec, Llc - MD Landline
240-429 Montgomery Silver Spring Cellco Partnership Dba Verizon Wireless - MD Wireless
240-430 Anne Arundel Kensington Cavalier Telephone Mid-Atlantic, Llc - MD Landline
240-431 Anne Arundel Tall Timbers Sprint Spectrum L.p. Wireless
240-432 Montgomery Beltsville Sprint Spectrum L.p. Wireless
240-433 Montgomery Silver Spring Cavalier Telephone Mid-Atlantic, Llc - MD Landline
240-434 District of Columbia Leonardtown Broadwing Communications. Llc - MD Landline
240-435 Charles Waldorf Cellco Partnership Dba Verizon Wireless - MD Wireless
240-436 Frederick Ijamsville Telcove Operations, Inc. - MD Landline
240-437 Montgomery Sandy Spring Xo Maryland, Llc Landline
240-438 Montgomery Silver Spring Sprint Spectrum L.p. Wireless
240-439 Frederick Frederick Cellco Partnership Dba Verizon Wireless - MD Wireless
240-440 Frederick Frederick New Cingular Wireless Pcs, Llc - DC Wireless
240-441 Prince Georges Oxon Hill Omnipoint Communications Cap Operations, Llc Wireless
240-442 Anne Arundel Oakland Verizon Maryland, Inc. Landline
240-444 Howard Laurel Cellco Partnership Dba Verizon Wireless - MD Wireless
240-445 Montgomery Bethesda Sprint Spectrum L.p. Wireless
240-446 Frederick Frederick Cellco Partnership Dba Verizon Wireless - MD Wireless
240-447 Montgomery Rockville New Cingular Wireless Pcs, Llc - DC Wireless
240-448 Charles Waldorf Sprint Spectrum L.p. Wireless
240-449 Montgomery Gaithersburg New Cingular Wireless Pcs, Llc - DC Wireless
240-450 Montgomery Silver Spring Cavalier Telephone Mid-Atlantic, Llc - MD Landline
240-452 Washington Hagerstown Lumos Networks Inc. - VA Landline
240-453 Montgomery Rockville Verizon Maryland, Inc. Landline
240-454 Montgomery Gaithersburg Paetec Communications, Inc. - MD Wireless
240-455 Loudoun Oxon Hill Paetec Communications, Inc. - MD Landline
240-456 Prince Georges Laurel Verizon Maryland, Inc. Landline
240-457 Frederick Frederick Cellco Partnership Dba Verizon Wireless - MD Wireless
240-458 Charles Waldorf Cellco Partnership Dba Verizon Wireless - MD Wireless
240-459 Howard Laurel Cellco Partnership Dba Verizon Wireless - MD Wireless
240-460 Montgomery Silver Spring New Cingular Wireless Pcs, Llc - DC Wireless
240-461 Montgomery Silver Spring New Cingular Wireless Pcs, Llc - DC Wireless
240-462 Montgomery Beltsville Sprint Spectrum L.p. Wireless
240-463 Montgomery Silver Spring New Cingular Wireless Pcs, Llc - DC Wireless
240-464 Montgomery Chevy Chase Sprint Spectrum L.p. Landline
240-465 Montgomery Mount Rainier Peerless Network Of Maryland, Llc Landline
240-466 District of Columbia Mechanicsville New Cingular Wireless Pcs, Llc - DC Wireless
240-467 Isle of Wight Oxon Hill Comcast Phone Of Northern Maryland, Inc. - MD Landline
240-468 Montgomery Mount Rainier Sprint Spectrum L.p. Wireless
240-469 Washington Hagerstown Sprint Spectrum L.p. - MD Wireless
240-470 Prince Georges Laurel Cellco Partnership Dba Verizon Wireless - MD Wireless
240-471 Montgomery Silver Spring Global Crossing Local Services, Inc.-Md Landline
240-472 Montgomery Silver Spring New Cingular Wireless Pcs, Llc - DC Wireless
240-473 Fairfax College Park Cavalier Telephone Mid-Atlantic, Llc - MD Landline
240-475 Montgomery Silver Spring New Cingular Wireless Pcs, Llc - DC Wireless
240-476 Montgomery Silver Spring Omnipoint Communications Cap Operations, Llc Wireless
240-477 Montgomery Gaithersburg Lightwave Communications, Llc - MD Landline
240-478 Montgomery Cabin John New Cingular Wireless Pcs, Llc - DC Wireless
240-479 Montgomery Oxon Hill Cellco Partnership Dba Verizon Wireless - MD Wireless
240-480 Montgomery Bethesda Sprint Spectrum L.p. Wireless
240-481 Montgomery Silver Spring Omnipoint Communications Cap Operations, Llc Wireless
240-482 Montgomery Cabin John Us Lec Of Maryland, Inc. Landline
240-483 Montgomery Oxon Hill Comcast Phone Of Northern Maryland, Inc. - MD Landline
240-485 Montgomery Cabin John Us Lec Of Maryland, Inc. Landline
240-486 Prince Georges Glenn Dale Omnipoint Communications Cap Operations, Llc Wireless
240-487 Fairfax Hyattsville Us Lec Of Maryland, Inc. Landline
240-488 Anne Arundel Oakland Shentel Communications, Llc - MD Landline
240-489 Montgomery Poolesville Xo Maryland, Llc Landline
240-490 Charles Middletown Omnipoint Communications Cap Operations, Llc Wireless
240-491 Montgomery Mount Rainier Global Crossing Local Services, Inc.-Md Landline
240-492 Fairfax Capitol Heights Us Lec Of Maryland, Inc. Landline
240-493 Fairfax Oxon Hill Us Lec Of Maryland, Inc. Landline
240-494 Montgomery Mount Rainier Cavalier East Llc - MD Landline
240-497 Montgomery Chevy Chase Verizon Maryland, Inc. Landline
240-498 Montgomery Beltsville Sprint Spectrum L.p. Wireless
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Phone Numbers Starting With (240) Area Code

Phone Number
240-240-0112		 USAGE
Wireless		 City
Beltsville		 Operate
Read more about who called from 2402400112		 Update Time
Apr-01-2025
Phone Number
240-208-3169		 USAGE
Landline		 City
La Plata		 Operate
Read more about who called from 2402083169		 Update Time
Mar-31-2025
Phone Number
240-490-1705		 USAGE
Wireless		 City
Middletown		 Operate
Read more about who called from 2404901705		 Update Time
Mar-31-2025
Phone Number
240-310-9027		 USAGE
Wireless		 City
Hagerstown		 Operate
Read more about who called from 2403109027		 Update Time
Mar-31-2025
Phone Number
240-208-5967		 USAGE
Landline		 City
La Plata		 Operate
Read more about who called from 2402085967		 Update Time
Mar-31-2025
Phone Number
240-370-9811		 USAGE
Wireless		 City
Bethesda		 Operate
Read more about who called from 2403709811		 Update Time
Mar-31-2025
Phone Number
240-820-4971		 USAGE
Wireless		 City
Bethesda		 Operate
Read more about who called from 2408204971		 Update Time
Mar-31-2025
Phone Number
240-498-3749		 USAGE
Wireless		 City
Beltsville		 Operate
Read more about who called from 2404983749		 Update Time
Mar-31-2025
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