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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
240-499 Montgomery Cabin John Us Lec Of Maryland, Inc. Landline
240-500 Washington Hagerstown Us Lec Of Maryland, Inc. Landline
240-501 Montgomery Silver Spring Sprint Spectrum L.p. Wireless
240-502 Montgomery Silver Spring Sprint Spectrum L.p. Wireless
240-503 Charles Newburg Peerless Network Of Maryland, Llc Landline
240-504 Montgomery Silver Spring Sprint Spectrum L.p. Wireless
240-505 Montgomery Silver Spring Omnipoint Communications Cap Operations, Llc Wireless
240-506 Montgomery Rockville New Cingular Wireless Pcs, Llc - DC Wireless
240-507 Montgomery Cabin John Cellco Partnership Dba Verizon Wireless - MD Wireless
240-508 Montgomery Capitol Heights Sprint Spectrum L.p. Wireless
240-509 Anne Arundel Crofton Bandwidth.com Clec, Llc - MD Landline
240-510 District of Columbia Upper Marlboro Xo Maryland, Llc Landline
240-512 Howard College Park Core Communications, Inc. - MD Landline
240-513 Washington Hagerstown Sprint Spectrum L.p. - MD Wireless
240-514 Montgomery Cabin John Us Lec Of Maryland, Inc. Landline
240-515 Montgomery Bethesda New Cingular Wireless Pcs, Llc - DC Wireless
240-516 Montgomery Silver Spring Us Lec Of Maryland, Inc. Landline
240-518 Charles Waldorf Sprint Spectrum L.p. Wireless
240-519 Montgomery Bethesda Sprint Spectrum L.p. Wireless
240-520 Washington Hagerstown Sprint Spectrum L.p. - MD Wireless
240-522 Allegany Cumberland Sprint Spectrum L.p. Wireless
240-523 Charles La Plata Xo Maryland, Llc Landline
240-524 Fairfax Laurel Peerless Network Of Maryland, Llc Landline
240-525 Fairfax Upper Marlboro Peerless Network Of Maryland, Llc Landline
240-526 Fairfax Leonardtown Peerless Network Of Maryland, Llc Landline
240-527 Washington Hagerstown Verizon Maryland, Inc. Landline
240-528 Charles Hughesville Broadwing Communications. Llc - MD Landline
240-529 Frederick Frederick Verizon Maryland, Inc. Landline
240-533 Montgomery Mount Rainier Teleport Communications America, Llc - DC Landline
240-535 Montgomery Silver Spring New Cingular Wireless Pcs, Llc - DC Wireless
240-536 Montgomery Sandy Spring Peerless Network Of Maryland, Llc Landline
240-538 District of Columbia Leonardtown Xo Maryland, Llc Landline
240-539 Fairfax Mount Rainier Peerless Network Of Maryland, Llc Landline
240-541 Montgomery Bethesda Sprint Spectrum L.p. Wireless
240-542 Fairfax College Park Us Lec Of Maryland, Inc. Landline
240-543 Montgomery Bethesda Sprint Spectrum L.p. Wireless
240-544 Fairfax Glenn Dale Us Lec Of Maryland, Inc. Landline
240-545 Fairfax Upper Marlboro Us Lec Of Maryland, Inc. Landline
240-546 Fairfax Clinton Us Lec Of Maryland, Inc. Landline
240-547 Fairfax Laurel Level 3 Communications, Llc - MD Landline
240-548 Mount Rainier Allegiance Telecom, Inc. - MD Landline
240-550 Montgomery Rockville New Cingular Wireless Pcs, Llc - DC Wireless
240-551 Montgomery Rockville New Cingular Wireless Pcs, Llc - DC Wireless
240-552 Montgomery Rockville New Cingular Wireless Pcs, Llc - DC Wireless
240-553 Mount Rainier Allegiance Telecom, Inc. - MD Landline
240-554 Laurel Allegiance Telecom, Inc. - MD Landline
240-556 Montgomery Glenn Dale Paetec Communications, Inc. - MD Landline
240-558 Anne Arundel Kensington Cavalier Telephone Mid-Atlantic, Llc - MD Landline
240-559 Montgomery Sandy Spring Allegiance Telecom, Inc. - MD Landline
240-560 Montgomery Chevy Chase Xo Maryland, Llc Landline
240-561 District of Columbia Leonardtown Cellco Partnership Dba Verizon Wireless - MD Wireless
240-565 Howard Laurel Omnipoint Communications Cap Operations, Llc Wireless
240-566 Frederick Frederick Verizon Maryland, Inc. Landline
240-567 Montgomery Rockville Verizon Maryland, Inc. Landline
240-568 Prince Georges Laurel Verizon Maryland, Inc. Landline
240-573 Upper Marlboro Global Crossing Local Services, Inc.-Md Landline
240-575 Frederick Frederick Level 3 Communications, Llc - MD Landline
240-577 District of Columbia Leonardtown Cellco Partnership Dba Verizon Wireless - MD Wireless
240-578 Frederick Frederick Cellco Partnership Dba Verizon Wireless - MD Wireless
240-580 Allegany Cumberland Sprint Spectrum L.p. Wireless
240-581 District of Columbia Laurel Paetec Communications, Inc. - DC Landline
240-582 Prince Georges Hyattsville Verizon Maryland, Inc. Landline
240-583 Prince Georges Beltsville Verizon Maryland, Inc. Landline
240-585 Charles Waldorf Cellco Partnership Dba Verizon Wireless - MD Wireless
240-586 Frederick Frederick Verizon Maryland, Inc. Landline
240-587 District of Columbia Leonardtown Cellco Partnership Dba Verizon Wireless - MD Wireless
240-593 Howard Laurel Omnipoint Communications Cap Operations, Llc Wireless
240-595 Montgomery Chevy Chase Cellco Partnership Dba Verizon Wireless - MD Wireless
240-597 Montgomery Gaithersburg Peerless Network Of Maryland, Llc Landline
240-599 Montgomery Rockville Broadwing Communications. Llc - MD Landline
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Phone Numbers Starting With (240) Area Code

Phone Number
240-240-0112		 USAGE
Landline		 City
Rockville		 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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