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240 Area Code 🌍☎️

Area Code Profile · Maryland

The 240 area code is located in the state of Maryland and covers 314 cities, serving a total population of approximately 2,372,890. Major cities covered by the 240 area code include Columbia, Germantown, Silver Spring, Waldorf, Frederick (which represents the most populated areas). There are a total of 785 telephone prefix exchanges in this area code, which support an estimated 7,850,000 active or assignable phone numbers. These prefix lines are operated by 53 distinct carriers, with Germantown as the primary rate center location.

Eastern Time314 Cities785 Prefixes

Reverse Phone Lookup in Germantown, Maryland

Unmask unknown callers, verify telemarketing reports, and view detailed owner information for any phone number beginning with area code (240).

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1

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Provide any 10-digit phone number starting with the (240) area code.

2

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Our system scans public registries, carrier mappings, and spam reports.

3

Reveal Report

Access location details, line type, carrier, owner information, and safety levels.

Neighborhood Demographics

Calculated demographics and census summary estimations for area code 240.

45.5 y/oMedian Age
$74,000Median Income
$185,000Median Home Value
2,372,890Total Population

Telemarketer Complaints

Most recent complaints and comments for phone numbers beginning with 240.

Did you receive an unwanted call from a (240) phone number?

Help the community identify spammers by filing a comment.

(240) 610-5715May 20, 2026Debt Collector
Automated voice caller looking for someone named David. Keeps calling repeatedly asking to settle a debt. I have had this number for years and don't know David.
See Details
(240) 623-5732May 19, 2026Political
Pre-recorded campaign call promoting a local candidate. Did not respect my request to be placed on the Do Not Call list.
See Details
(240) 636-5749May 18, 2026Scam / Fraud
Received a text and follow-up call saying my bank account was locked due to suspicious transactions. Included a link to a fake login portal. Do not click!
See Details

Cities in the 240 Area Code

The most populous cities in area code 240 are: Columbia (99,615), Germantown (86,395), Silver Spring (71,452), Waldorf (67,752), and Frederick (65,239).

Other cities in the 240 area code include:

Rockville, Bethesda, Gaithersburg, Bowie, Aspen Hill, Wheaton, Potomac, North Bethesda, Hagerstown, Clinton, Olney, Chillum, Montgomery Village, College Park, South Laurel, Suitland, Laurel, North Potomac, Scaggsville, Fort Washington, Fairland, Landover, Greenbelt, Cumberland, Camp Springs.

CityPopulation% in Area Code
Columbia99,6157%
Germantown86,395100%
Silver Spring71,452100%
Waldorf67,752100%
Frederick65,239100%
Rockville61,209100%
Bethesda60,858100%
Gaithersburg59,933100%
Bowie54,727100%
Aspen Hill48,759100%
Wheaton48,284100%
Potomac44,965100%
North Bethesda43,828100%
Hagerstown39,662100%
Clinton35,970100%
Olney33,844100%
Chillum33,513100%
Montgomery Village32,032100%
College Park30,413100%
South Laurel26,112100%

Showing top 20 of 314 cities.

What Time Zone is Area Code 240?

Eastern Time Zone

Abbreviation: ET · UTC Offset: UTC-5

The 240 area code lies within the Eastern Time Zone (ET, UTC-5).

Nearby Area Codes

227Germantown, Maryland301Germantown, Maryland410Baltimore, Maryland443Baltimore, Maryland667Baltimore, Maryland

Phone Prefixes in the 240 Area Code

785 prefixes found · 53 carriers · 63 rate centers

PrefixCarrierRate Center
(240) 200BANDWIDTH.COM CLEC, LLC - MDWSHNGTNZN2
(240) 201PEERLESS NETWORK OF MARYLAND, LLCRIDGE
(240) 202ONVOY, LLC - MDHIGHFIELD
(240) 203OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLCHAGERSTOWN
(240) 204CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MDWSHNGTNZN2
(240) 205NEW CINGULAR WIRELESS PCS, LLC - DCWSNGTNZN10
(240) 206MCIMETRO ACCESS TRANSMISSION SERVICES LLCWSNG236Z14
(240) 207CAVALIER EAST, LLC - MDDAMASCS236
(240) 208PEERLESS NETWORK OF MARYLAND, LLCLA PLATA
(240) 209PEERLESS NETWORK OF MARYLAND, LLCINDIANHEAD
(240) 210NEW CINGULAR WIRELESS PCS, LLC - DCWALDORF
(240) 212CORE COMMUNICATIONS, INC.- MDOAKLAND
(240) 213PEERLESS NETWORK OF MARYLAND, LLCWALDORF
(240) 214PEERLESS NETWORK OF MARYLAND, LLCMECHANCSVL
(240) 215LEVEL 3 COMMUNICATIONS, LLC - MDFREDERICK
(240) 216METROPCS, INC.WALDORF
(240) 217OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLCHAGERSTOWN
(240) 218PEERLESS NETWORK OF MARYLAND, LLCNANJEMOY
(240) 219PEERLESS NETWORK OF MARYLAND, LLCRIDGE
(240) 220PEERLESS NETWORK OF MARYLAND, LLCPOOLESVL
(240) 221VERIZON MARYLAND, INC.WSNGTNZN11
(240) 222CAVALIER TELEPHONE MID-ATLANTIC, LLC - MDWALDORF
(240) 223MCIMETRO ACCESS TRANSMISSION SERVICES LLCWSHNGTNZN2
(240) 224CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MDGAITHERSBG
(240) 225CORE COMMUNICATIONS, INC.- MDFREDERICK
(240) 226ONVOY, LLC - MDOAKLAND
(240) 227NEW CINGULAR WIRELESS PCS, LLC - DCMYERSVILLE
(240) 228VERIZON MARYLAND, INC.WSNG236Z13
(240) 229LEVEL 3 COMMUNICATIONS, LLC - MDWALDORF
(240) 230GLOBAL CROSSING LOCAL SERVICES, INC. - MDHUGHESVL
(240) 231CORE COMMUNICATIONS, INC.- MDHAGERSTOWN
(240) 232LEVEL 3 COMMUNICATIONS, LLC - MDWSNG236Z14
(240) 233TELEPORT COMMUNICATIONS AMERICA, LLC - DCTOMPKINSVL
(240) 234CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MDWSHNGTNZN2
(240) 235PAETEC COMMUNICATIONS, INC. - MDWSHNGTNZN2
(240) 236VERIZON MARYLAND, INC.FREDERICK
(240) 237TELEPORT COMMUNICATIONS AMERICA, LLC - DCLXTNPKGRML
(240) 238PAETEC COMMUNICATIONS, INC. - MDWSNGTNZN10
(240) 239CORE COMMUNICATIONS, INC.- MDLEONARDTN
(240) 240FRACTEL, LLCDAMASCS240
(240) 241STARPOWER COMMUNICATIONS, LLC - MDWSNG236Z13
(240) 242STARPOWER COMMUNICATIONS, LLC - MDWSNGTNZN11
(240) 243MCIMETRO ACCESS TRANSMISSION SERVICES LLCGAITHERSBG
(240) 244STARPOWER COMMUNICATIONS, LLC - MDWSNGTNZN16
(240) 245STARPOWER COMMUNICATIONS, LLC - MDWSNG236Z14
(240) 246STARPOWER COMMUNICATIONS, LLC - MDGAITHERSBG
(240) 247MCIMETRO ACCESS TRANSMISSION SERVICES LLCWSHNGTNZN3
(240) 248PEERLESS NETWORK OF MARYLAND, LLCRIDGE
(240) 249TELEPORT COMMUNICATIONS AMERICA, LLC - DCMECHANCSVL
(240) 250PEERLESS NETWORK OF MARYLAND, LLCBRANDYWINE
(240) 251CORE COMMUNICATIONS, INC.- MDHIGHFIELD
(240) 252LEVEL 3 COMMUNICATIONS, LLC - MDGAITHERSBG
(240) 253GLOBAL CROSSING LOCAL SERVICES, INC. - MDWSHNGTNZN6
(240) 254TELEPORT COMMUNICATIONS AMERICA, LLC - DCHUGHESVL
(240) 255PEERLESS NETWORK OF MARYLAND, LLCPOOLESVL
(240) 256TELEPORT COMMUNICATIONS AMERICA, LLC - DCLEONARDTN
(240) 257TELEPORT COMMUNICATIONS AMERICA, LLC - DCNANJEMOY
(240) 258TELEPORT COMMUNICATIONS AMERICA, LLC - DCRIDGE
(240) 259ONVOY SPECTRUM, LLCHUGHESVL
(240) 260MCIMETRO ACCESS TRANSMISSION SERVICES LLCWSNG236Z14
(240) 261ONVOY, LLC - MDGAITHERSBG
(240) 262COMCAST PHONELXTNPKGRML
(240) 263NEW CINGULAR WIRELESS PCS, LLC - DCWSHNGTNZN2
(240) 264VERIZON MARYLAND, INC.LAUREL236
(240) 265OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLCWSHNGTNZN2
(240) 266PEERLESS NETWORK OF MARYLAND, LLCWSNG236Z14
(240) 267CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MDHAGERSTOWN
(240) 268MCIMETRO ACCESS TRANSMISSION SERVICES LLCWSNGTNZN10
(240) 269PEERLESS NETWORK OF MARYLAND, LLCWSNGTNZN16
(240) 270CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MDWALDORF
(240) 271NEW CINGULAR WIRELESS PCS, LLC - DCWSHNGTNZN2
(240) 272OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLCWSHNGTNZN2
(240) 273LEVEL 3 COMMUNICATIONS, LLC - MDWSHNGTNZN6
(240) 274NEW CINGULAR WIRELESS PCS, LLC - DCWSHNGTNZN2
(240) 275CORE COMMUNICATIONS, INC.- MDGRANTSVL
(240) 276VERIZON MARYLAND, INC.WSNGTNZN10
(240) 277OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLCWSHNGTNZN2
(240) 278CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MDLAUREL236
(240) 279CORE COMMUNICATIONS, INC.- MDWALDORF
(240) 280COMCAST IP PHONE, LLCLAUREL236
(240) 281NEW CINGULAR WIRELESS PCS, LLC - DCWSHNGTNZN2
(240) 282PEERLESS NETWORK OF MARYLAND, LLCMECHANCSVL
(240) 283PAETEC COMMUNICATIONS, INC. - MDWSNGTNZN11
(240) 284LEVEL 3 COMMUNICATIONS, LLC - MDFROSTBURG
(240) 285CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MDFREDERICK
(240) 286OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLCWSHNGTNZN2
(240) 287CORE COMMUNICATIONS, INC.- MDHANCOCK
(240) 288COMCAST IP PHONE, LLCTHURMONT
(240) 289CAVALIER TELEPHONE MID-ATLANTIC, LLC - MDWSHNGTNZN6
(240) 290MCIMETRO ACCESS TRANSMISSION SERVICES LLCWSNGTNZN11
(240) 291NEW CINGULAR WIRELESS PCS, LLC - DCHAGERSTOWN
(240) 292VERIZON MARYLAND, INC.WSNGTNZN11
(240) 293STARPOWER COMMUNICATIONS, LLC - MDWSNGTNZN12
(240) 294MCIMETRO ACCESS TRANSMISSION SERVICES LLCLAUREL236
(240) 295CAVALIER TELEPHONE MID-ATLANTIC, LLC - MDLAUREL236
(240) 296CAVALIER TELEPHONE MID-ATLANTIC, LLC - MDWSHNGTNZN4
(240) 297LEVEL 3 COMMUNICATIONS, LLC - MDWSNG236Z13
(240) 298CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MDLEONARDTN
(240) 299METROPCS, INC.WALDORF
(240) 300CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MDWALDORF

Showing first 100 of 785 prefixes.

Frequently Asked Questions

Where is area code 240?
Area code 240 is located in Maryland, covering cities including Columbia, Germantown, Silver Spring.
What time zone is area code 240?
Area code 240 is in the Eastern Time Zone (ET, UTC-5).
What state is area code 240?
Area code 240 is in Maryland.