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Area Code 240 Location & Details

State / Region: Maryland • Country: United States

Major Cities Covered: Frederick, Gaithersburg, Rockville, Bowie, Hagerstown, College Park, Laurel, Greenbelt, Hyattsville, Cumberland

Standard Dial Format
+1 (240) XXX-XXXX
Country Code: +1 (NANP Format)
What State is Area Code 240?
MarylandState Hub →
Country Territory
United States
240 Area Code Time Zone
Eastern
240 Overlay Codes
227, 301

Area Code 240 Geographic Map

Interactive location bounds and coverage area for Maryland (Eastern Timezone)

Lat: 39.15° • Lng: -77.32°
📍 Geographic Center: MarylandMap data © OpenStreetMap contributors

Where is Area Code 240 Located?

Telephone area code 240 is assigned to Maryland in United States. It serves cities and metropolitan communities including Frederick, Gaithersburg, Rockville, Bowie, Hagerstown, College Park, Laurel, Greenbelt, Hyattsville, Cumberland.

Historical Context & Area Code Overlay Information:240 serves Maryland (United States).

For local and long-distance calls within area code 240, standard 10-digit dialing (240) XXX-XXXX applies.

Who Called Me from Area Code 240?

Received an unknown call, missed call, or text scam from area code 240? Here is how to trace who is calling from 240 area code and verify unknown numbers safely:

1.
Identify Missed Calls & Voicemails:

Legitimate contacts usually leave a detailed voicemail or caller ID record.

2.
Watch Out for Neighbor Spoofing:

Robocallers often fake incoming caller ID numbers using your local 240 prefix to boost pick-up rates.

3.
Reverse Phone Lookup Area Code 240:

Search public white-pages or use caller intelligence guides before returning unfamiliar calls.

Learn How Reverse Phone Lookups Work→

How to Call Area Code 240 & Dialing Format

When placing a phone call to a number in area code 240, follow the correct dialing format depending on your calling location:

  • Calling from inside the US / Canada (+1): Dial 1 + (240) + 7-digit number.
  • Calling from an international location outside +1: Dial your country's international exit code (e.g. 011 in US or + on mobile) + 1 + 240 + 7-digit number.
  • Do I need to dial area code 240 for local calls? Yes, 10-digit dialing (area code + line number) is mandatory across North American telephone networks.

Top Cities & Municipalities Served in Area Code 240

Urban centers, census places, and communities within the +1-240 calling area

50 Major Cities Listed
City NameCountyPopulation% of 240 Pop
FrederickFrederick County92,05913.8%
GaithersburgMontgomery County71,11310.7%
RockvilleMontgomery County67,56310.1%
BowiePrince George's County58,3838.8%
HagerstownWashington County44,2286.6%
College ParkPrince George's County35,4185.3%
LaurelHoward County30,2544.5%
GreenbeltPrince George's County24,9483.7%
HyattsvillePrince George's County21,1583.2%
CumberlandAllegany County18,7992.8%
Takoma ParkPrince George's County17,2602.6%
New CarrolltonPrince George's County13,6442.0%
La PlataCharles County12,1371.8%
Mount AiryCarroll County9,8571.5%
BladensburgPrince George's County9,6711.5%
BrunswickFrederick County9,3801.4%
Mount RainierPrince George's County8,3071.2%
Riverdale ParkPrince George's County7,3431.1%
FrostburgAllegany County6,9791.0%
WalkersvilleFrederick County6,5011.0%

Counties Covered by Area Code 240

Geographic county distribution and population coverage across Maryland

County NameTotal Population% of 240 Area% of County
Prince George's County964,59636.1%25%
Montgomery County1,073,04522.5%14%
Frederick County298,85518.9%42%
Washington County157,1408.3%35%
Howard County337,7954.5%9%
Allegany County66,9843.9%38%
Charles County174,4992.5%9%
Carroll County176,7901.5%6%
Garrett County28,4170.9%20%
St. Mary's County116,2160.8%4%
Caroline County34,0590.2%5%

☎️Area Code 240 Exchange Prefixes & Carriers

Showing 50 of 800 central office 3-digit prefixes and assigned telecom carriers

61% Landline22% Wireless18% VoIP
PrefixLine UsageRate CenterAssigned CarrierAssign Date
(240) 200-💻VoIPWSHNGTNZN2BANDWIDTH.COM CLEC, LLC - MD10/04/2010
(240) 201-💻VoIPRIDGEPEERLESS NETWORK OF MARYLAND, LLCN/A
(240) 202-💻VoIPHIGHFIELDONVOY, LLC - MD05/28/2020
(240) 203-📞LandlineHAGERSTOWNOMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC10/04/2011
(240) 204-📱WirelessWSHNGTNZN2CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD09/07/2011
(240) 205-📱WirelessWSNGTNZN10NEW CINGULAR WIRELESS PCS, LLC - DC07/23/2003
(240) 206-📞LandlineWSNG236Z14MCIMETRO ACCESS TRANSMISSION SERVICES LLCN/A
(240) 207-📞LandlineDAMASCS236PAETEC ITEL, LLCN/A
(240) 208-💻VoIPLA PLATAPEERLESS NETWORK OF MARYLAND, LLCN/A
(240) 209-💻VoIPINDIANHEADPEERLESS NETWORK OF MARYLAND, LLCN/A
(240) 210-📱WirelessWALDORFNEW CINGULAR WIRELESS PCS, LLC - DCN/A
(240) 211-📞LandlineXXXXXXXXXXMULTIPLE OCN LISTINGN/A
(240) 212-📞LandlineOAKLANDCORE COMMUNICATIONS, INC.- MDN/A
(240) 213-💻VoIPWALDORFPEERLESS NETWORK OF MARYLAND, LLCN/A
(240) 214-💻VoIPMECHANCSVLPEERLESS NETWORK OF MARYLAND, LLCN/A
(240) 215-📞LandlineFREDERICKLEVEL 3 COMMUNICATIONS, LLC - MDN/A
(240) 216-📱WirelessWALDORFMETROPCS, INC.03/15/2001
(240) 217-📞LandlineHAGERSTOWNOMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC04/16/2001
(240) 218-💻VoIPNANJEMOYPEERLESS NETWORK OF MARYLAND, LLCN/A
(240) 219-💻VoIPRIDGEPEERLESS NETWORK OF MARYLAND, LLC09/22/2014
(240) 220-💻VoIPPOOLESVLPEERLESS NETWORK OF MARYLAND, LLCN/A
(240) 221-📞LandlineWSNGTNZN11VERIZON MARYLAND, INC.N/A
(240) 222-📞LandlineWALDORFPAETEC ITEL, LLCN/A
(240) 223-📞LandlineWSHNGTNZN2MCIMETRO ACCESS TRANSMISSION SERVICES LLCN/A
(240) 224-📱WirelessGAITHERSBGCELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD09/10/2012
(240) 225-📞LandlineFREDERICKCORE COMMUNICATIONS, INC.- MDN/A
(240) 226-💻VoIPOAKLANDONVOY, LLC - MD07/16/2020
(240) 227-📱WirelessMYERSVILLENEW CINGULAR WIRELESS PCS, LLC - DC07/25/2023
(240) 228-📞LandlineWSNG236Z13VERIZON MARYLAND, INC.N/A
(240) 229-📞LandlineWALDORFLEVEL 3 COMMUNICATIONS, LLC - MDN/A
(240) 230-📞LandlineHUGHESVLLEVEL 3 COMMUNICATIONS, LLC - MDN/A
(240) 231-📞LandlineHAGERSTOWNCORE COMMUNICATIONS, INC.- MDN/A
(240) 232-📞LandlineWSNG236Z14LEVEL 3 COMMUNICATIONS, LLC - MDN/A
(240) 233-📞LandlineTOMPKINSVLTELEPORT COMMUNICATIONS AMERICA, LLC - DCN/A
(240) 234-📱WirelessWSHNGTNZN2CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD10/04/2011
(240) 235-📞LandlineWSHNGTNZN2PAETEC ITEL, LLCN/A
(240) 236-📞LandlineFREDERICKVERIZON MARYLAND, INC.N/A
(240) 237-📞LandlineLXTNPKGRMLTELEPORT COMMUNICATIONS AMERICA, LLC - DCN/A
(240) 238-📞LandlineWSNGTNZN10PAETEC ITEL, LLCN/A
(240) 239-📞LandlineLEONARDTNCORE COMMUNICATIONS, INC.- MDN/A
(240) 240-📞LandlineDAMASCS240FRACTEL, LLC07/02/2020
(240) 241-📞LandlineWSNG236Z13STARPOWER COMMUNICATIONS, LLC - MDN/A
(240) 242-📞LandlineWSNGTNZN11STARPOWER COMMUNICATIONS, LLC - MDN/A
(240) 243-📞LandlineGAITHERSBGMCIMETRO ACCESS TRANSMISSION SERVICES LLCN/A
(240) 244-📞LandlineWSNGTNZN16STARPOWER COMMUNICATIONS, LLC - MDN/A
(240) 245-📞LandlineWSNG236Z14STARPOWER COMMUNICATIONS, LLC - MDN/A
(240) 246-📞LandlineGAITHERSBGSTARPOWER COMMUNICATIONS, LLC - MDN/A
(240) 247-📞LandlineWSHNGTNZN3MCIMETRO ACCESS TRANSMISSION SERVICES LLCN/A
(240) 248-💻VoIPRIDGEPEERLESS NETWORK OF MARYLAND, LLCN/A
(240) 249-📞LandlineMECHANCSVLTELEPORT COMMUNICATIONS AMERICA, LLC - DCN/A

Frequently Asked Questions about Area Code 240

Where is area code 240 located?

Area code 240 is located in Maryland (United States), serving cities like Frederick, Gaithersburg, Rockville, Bowie, Hagerstown, College Park, Laurel, Greenbelt, Hyattsville, Cumberland.

What timezone is area code 240?

Area code 240 operates in the Eastern timezone.

What state is area code 240?

Area code 240 is assigned to the state / telecom territory of Maryland.

Is area code 240 a scam or dangerous?

Area code 240 is an official geographic area code for Maryland. However, beware of robocaller spoofing.

Maryland State Area Codes

View complete directory of telephone area codes assigned to Maryland.

Explore Maryland Directory

Get a 240 Business Phone Number

How to acquire a virtual phone number or business line with area code 240 for local customer trust in Maryland.

Get 240 Business Number
🛡️ Scam & Safety Directory

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Overlay & Nearby Area Codes for Maryland

Explore neighboring telecom prefixes sharing geographical boundaries with area code 240.

227
Eastern
Area Code 227
Frederick, Gaithersburg, Rockville, Hagerstown, College Park, Laurel, Greenbelt, Hyattsville, Cumberland, Takoma Park
301
Eastern
Area Code 301
Frederick, Gaithersburg, Rockville, Bowie, Hagerstown, College Park, Laurel, Greenbelt, Hyattsville, Cumberland
410
Eastern
Area Code 410
Baltimore, Bowie, Annapolis, Salisbury, Westminster, Aberdeen, Easton, Elkton, Havre De Grace, Cambridge
443
Eastern
Area Code 443
Baltimore, Bowie, Annapolis, Salisbury, Westminster, Aberdeen, Easton, Elkton, Havre De Grace, Cambridge
667
Eastern
Area Code 667
Baltimore, Bowie, Annapolis, Salisbury, Westminster, Aberdeen, Easton, Elkton, Havre De Grace, Cambridge