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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
240-200 Montgomery Mount Rainier Bandwidth.com Clec, Llc - MD Landline
240-201 District of Columbia Ridge Peerless Network Of Maryland, Llc Landline
240-203 Washington Hagerstown Sprint Spectrum L.p. - MD Wireless
240-204 Montgomery Bethesda Cellco Partnership Dba Verizon Wireless - MD Wireless
240-205 Montgomery Cabin John New Cingular Wireless Pcs, Llc - DC Wireless
240-206 District of Columbia Glenn Dale Xo Maryland, Llc Landline
240-207 Montgomery Damascus Cavalier East Llc - MD Landline
240-208 Charles La Plata Peerless Network Of Maryland, Llc Landline
240-209 Charles Indian Head Peerless Network Of Maryland, Llc Landline
240-210 Charles Waldorf New Cingular Wireless Pcs, Llc - DC Wireless
240-212 Garrett Oakland Core Communications, Inc. - MD Landline
240-213 Charles Waldorf Peerless Network Of Maryland, Llc Landline
240-214 District of Columbia Mechanicsville Peerless Network Of Maryland, Llc Landline
240-215 Frederick Frederick Telcove Operations, Inc. - MD Landline
240-216 Charles Waldorf Sprint Spectrum L.p. Wireless
240-217 Washington Hagerstown Omnipoint Communications Cap Operations, Llc Wireless
240-218 Charles Nanjemoy Peerless Network Of Maryland, Llc Landline
240-219 Fairfax Reston Peerless Network Of Maryland, Llc Landline
240-220 Montgomery Poolesville Peerless Network Of Maryland, Llc Landline
240-221 Montgomery Rockville Verizon Maryland, Inc. Landline
240-222 Charles Waldorf Cavalier Telephone Mid-Atlantic, Llc - MD Landline
240-223 Montgomery Mount Rainier Allegiance Telecom, Inc. - MD Landline
240-224 Montgomery Gaithersburg Cellco Partnership Dba Verizon Wireless - MD Wireless
240-225 Frederick Frederick Core Communications, Inc. - MD Landline
240-228 Prince Georges Laurel Verizon Maryland, Inc. Landline
240-229 Charles Waldorf Broadwing Communications. Llc - MD Landline
240-230 Charles Hughesville Global Crossing Local Services, Inc.-Md Landline
240-231 Washington Hagerstown Core Communications, Inc. - MD Landline
240-232 District of Columbia Mount Rainier Broadwing Communications. Llc - MD Landline
240-233 Charles Newburg Teleport Communications America, Llc - DC Landline
240-234 Montgomery Mount Rainier Cellco Partnership Dba Verizon Wireless - MD Wireless
240-235 Montgomery Bethesda Paetec Communications, Inc. - MD Landline
240-236 Frederick Frederick Verizon Maryland, Inc. Landline
240-237 District of Columbia Callaway Teleport Communications America, Llc - DC Landline
240-238 Montgomery Rockville Paetec Communications, Inc. - MD Landline
240-239 Montgomery Leonardtown Core Communications, Inc. - MD Landline
240-241 Prince Georges Chevy Chase Starpower Communications, Llc - MD Landline
240-242 Montgomery Kensington Starpower Communications, Llc - MD Landline
240-243 Montgomery Gaithersburg Allegiance Telecom, Inc. - MD Landline
240-244 District of Columbia Mount Rainier Starpower Communications, Llc - MD Landline
240-245 Prince Georges Glenn Dale Starpower Communications, Llc - MD Landline
240-246 Montgomery Gaithersburg Starpower Communications, Llc - MD Landline
240-247 Montgomery Mount Rainier Allegiance Telecom, Inc. - MD Landline
240-248 Fairfax Ridge Peerless Network Of Maryland, Llc Landline
240-249 District of Columbia Mechanicsville Teleport Communications America, Llc - DC Landline
240-250 Fairfax Brandywine Peerless Network Of Maryland, Llc Landline
240-251 Washington Highfield Core Communications, Inc. - MD Landline
240-252 Montgomery Gaithersburg Level 3 Communications, Llc - MD Landline
240-253 Mount Rainier Global Crossing Local Services, Inc.-Md Landline
240-254 Charles Hughesville Teleport Communications America, Llc - DC Landline
240-255 Montgomery Poolesville Peerless Network Of Maryland, Llc Landline
240-256 District of Columbia Leonardtown Teleport Communications America, Llc - DC Landline
240-257 Charles Nanjemoy Teleport Communications America, Llc - DC Landline
240-258 Fairfax Ridge Teleport Communications America, Llc - DC Landline
240-260 Mount Rainier Allegiance Telecom, Inc. - MD Landline
240-261 Montgomery Gaithersburg Neutral Tandem-Maryland, Llc - MD Landline
240-262 District of Columbia Callaway Sprint Spectrum L.p. Wireless
240-263 Montgomery Bethesda Sprint Spectrum L.p. Wireless
240-264 Prince Georges Beltsville Verizon Maryland, Inc. Landline
240-265 Montgomery Bethesda Sprint Spectrum L.p. Wireless
240-266 Fairfax Mount Rainier Peerless Network Of Maryland, Llc Landline
240-268 Montgomery Rockville Allegiance Telecom, Inc. - MD Landline
240-269 Fairfax Mount Rainier Peerless Network Of Maryland, Llc Landline
240-270 Charles Waldorf Cellco Partnership Dba Verizon Wireless - MD Wireless
240-271 Montgomery Bethesda New Cingular Wireless Pcs, Llc - DC Wireless
240-272 Montgomery Bethesda Sprint Spectrum L.p. Wireless
240-273 District of Columbia Mount Rainier Broadwing Communications. Llc - MD Landline
240-274 Montgomery Bethesda New Cingular Wireless Pcs, Llc - DC Wireless
240-275 Garrett Grantsville Core Communications, Inc. - MD Landline
240-276 Montgomery Rockville Verizon Maryland, Inc. 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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