Area code 240 covers part of Marylandstate, covering most of Montgomery, Prince George's, Charles, St. Mary's, Frederick counties. It was started on Jan 01, 2000. This region follows US/Eastern + Daylight Savings timezone. Other popular area codes that belong to Maryland state include 301, 410, 443, 667.
Date Changed | Change Details |
May 10, 2014 | Area code 301 subscribers are now overlayed with area code 240. Subscriber area code 240-288 was assigned on Apr 14, 2014 and is operational from May 10, 2014. |
Apr 19, 2014 | Area code 301 subscribers are now overlayed with area code 240. Subscriber area code 240-213 is operational from Apr 19, 2014. |
Apr 19, 2014 | Area code 301 subscribers are now overlayed with area code 240. Subscriber area code 240-209 is operational from Apr 19, 2014. |
Apr 19, 2014 | Area code 301 subscribers are now overlayed with area code 240. Subscriber area code 240-214 is operational from Apr 19, 2014. |
Mar 31, 2014 | Area code 301 subscribers are now overlayed with area code 240. Subscriber area code 240-270 was assigned on Mar 03, 2014 and is operational from Mar 31, 2014. |
Mar 30, 2014 | Area code 301 subscribers are now overlayed with area code 240. Subscriber area code 240-218 is operational from Mar 30, 2014. |
Area Code | City | County | Population | Network Operator |
240-200-2 | Beltsville | Montgomery | 971,777 | Sprint Spectrum LP |
240-200-3 | Chevy Chase | Montgomery | 971,777 | Paetec Communications Inc - MD |
240-200-1 | Washington | Montgomery | 971,777 | Allegiance Telecom of Maryland Inc |
240-200-0 | Washington | Montgomery | 971,777 | Bandwidth.com CLEC LLC - MD |
240-200-9 | Washington | Montgomery | 971,777 | YMax Communications Corporation - MD |
240-201 | Washington | St. Mary's | 105,151 | Peerless Network of the District of Columbia LLC - DC |
240-203-7 | Hagerstown | Washington | 147,430 | Bandwidth.com CLEC LLC - MD |
240-203-0 | Hagerstown | Washington | 147,430 | Sprint Spectrum LP - MD |
240-204-0 | Annapolis Junction | Montgomery | 971,777 | Cellco Partnership dba Verizon Wireless - MD |
240-204-5 | Herndon | Montgomery | 971,777 | Broadview Networks Inc - DC |
240-204-6 | Mc Lean | Montgomery | 971,777 | Level 3 Communications LLC - MD |
240-204-9 | Silver Spring | Montgomery | 971,777 | Peerless Network of Maryland LLC |
240-205-9 | Annapolis Junction | Montgomery | 971,777 | Cellco Partnership dba Verizon Wireless - MD |
240-205-0 | Beltsville | Montgomery | 971,777 | New Cingular Wireless PCS LLC - DC |
240-205-8 | Mc Lean | Montgomery | 971,777 | Level 3 Communications LLC - MD |
240-206-9 | Alexandria | Prince George's | 863,420 | Comcast Phone of Northern Maryland Inc - MD |
240-206-6 | Mc Lean | Prince George's | 863,420 | Level 3 Communications LLC - MD |
240-206-7 | Reston | Prince George's | 863,420 | MCI Worldcom Communications Inc - MD |
240-206-5 | Washington | Prince George's | 863,420 | Bandwidth.com CLEC LLC - MD |
240-206-0 | Washington | Prince George's | 863,420 | XO Maryland LLC |
240-207-3 | Alexandria | Montgomery | 971,777 | Comcast Phone of Northern Maryland Inc - MD |
240-207-4 | Mc Lean | Montgomery | 971,777 | Level 3 Communications LLC - MD |
240-207-2 | Silver Spring | Montgomery | 971,777 | Lightwave Communications LLC - MD |
240-207-6 | Washington | Montgomery | 971,777 | Bandwidth.com CLEC LLC - MD |
240-207-0 | Washington | Montgomery | 971,777 | Cavalier East LLC - MD |
240-208 | Washington | Charles | 146,551 | Peerless Network of the District of Columbia LLC - DC |
240-209 | Washington | Charles | 146,551 | Peerless Network of the District of Columbia LLC - DC |
240-210-8 | Alexandria | Charles | 146,551 | Comcast Phone of Northern Maryland Inc - MD |
240-210-0 | Beltsville | Charles | 146,551 | New Cingular Wireless PCS LLC - DC |
240-210-9 | Washington | Charles | 146,551 | Bandwidth.com CLEC LLC - MD |
240-211 | 565,213 | Community Support And Referral Services | ||
240-212 | Frederick | Garrett | 30,097 | Core Communications Inc - MD |
240-213 | Washington | Charles | 146,551 | Peerless Network of the District of Columbia LLC - DC |
240-214 | Washington | St. Mary's | 105,151 | Peerless Network of the District of Columbia LLC - DC |
240-215-7 | Frederick | Frederick | 233,385 | Cellco Partnership dba Verizon Wireless - MD |
240-215-4 | Frederick | Frederick | 233,385 | Level 3 Communications LLC - MD |
240-215-0 | Ijamsville | Frederick | 233,385 | TelCove Operations Inc - MD |
240-215-2 | Monrovia | Frederick | 233,385 | AT&T Local |
240-216-9 | Washington | Charles | 146,551 | Cellco Partnership dba Verizon Wireless - MD |
240-216-0 | Washington | Charles | 146,551 | Sprint Spectrum LP |
240-217-0 | Frederick | Washington | 147,430 | Omnipoint Communications Cap Operations LLC |
240-218 | Washington | Charles | 146,551 | Peerless Network of the District of Columbia LLC - DC |
240-220 | Washington | Montgomery | 971,777 | Peerless Network of Maryland LLC |
240-221-3 | Alexandria | Montgomery | 971,777 | Comcast Phone of Northern Maryland Inc - MD |
240-221-8 | Laurel | Montgomery | 971,777 | VDL Inc dba Global Telecom Brokers - MD |
240-221-0 | Rockville | Montgomery | 971,777 | Verizon Maryland Inc |
240-221-1 | Washington | Montgomery | 971,777 | Bandwidth.com CLEC LLC - MD |
240-222-3 | Alexandria | Charles | 146,551 | Comcast Phone of Northern Maryland Inc - MD |
240-222-0 | Herndon | Charles | 146,551 | Cavalier Telephone Mid-Atlantic LLC - MD |
240-222-2 | Washington | Charles | 146,551 | Cellco Partnership dba Verizon Wireless - MD |
240-223-7 | Beltsville | Montgomery | 971,777 | Sprint Spectrum LP |
240-223-0 | Washington | Montgomery | 971,777 | Allegiance Telecom of Maryland Inc |
240-224-7 | Alexandria | Montgomery | 971,777 | Comcast Phone of Northern Maryland Inc - MD |
240-224-0 | Annapolis Junction | Montgomery | 971,777 | Cellco Partnership dba Verizon Wireless - MD |
240-224-6 | Beltsville | Montgomery | 971,777 | MetroPCS Inc |
240-224-9 | Silver Spring | Montgomery | 971,777 | Peerless Network of Maryland LLC |
240-224-3 | Washington | Montgomery | 971,777 | Bandwidth.com CLEC LLC - MD |
240-225 | Frederick | Frederick | 233,385 | Core Communications Inc - MD |
240-228-0 | Laurel | Prince George's | 863,420 | Verizon Maryland Inc |
240-229-5 | Station Hills | Charles | 146,551 | Leap Wireless International Inc dba Cricket Communications Inc |
240-229-6 | Washington | Charles | 146,551 | Bandwidth.com CLEC LLC - MD |
240-229-0 | Washington | Charles | 146,551 | Broadwing Communications LLC - MD |
240-229-8 | Washington | Charles | 146,551 | Sprint Spectrum LP |
240-230-2 | Beltsville | Charles | 146,551 | Omnipoint Communications Cap Operations LLC |
240-230-8 | Mc Lean | Charles | 146,551 | Level 3 Communications LLC - MD |
240-230-7 | Washington | Charles | 146,551 | Bandwidth.com CLEC LLC - MD |
240-230-0 | Washington | Charles | 146,551 | Global Crossing Local Services Inc - MD |
240-231 | Frederick | Washington | 147,430 | Core Communications Inc - MD |
240-232-7 | Washington | Prince George's | 863,420 | Bandwidth.com CLEC LLC - MD |
240-232-0 | Washington | Prince George's | 863,420 | Broadwing Communications LLC - MD |
240-233-3 | Alexandria | Charles | 146,551 | Comcast Phone of Northern Maryland Inc - MD |
240-233-7 | Chevy Chase | Charles | 146,551 | Paetec Communications Inc - MD |
240-233-5 | Damascus | Charles | 146,551 | Core Communications Inc - MD |
240-233-9 | Mc Lean | Charles | 146,551 | Level 3 Communications LLC - MD |
240-233-1 | Mc Lean | Charles | 146,551 | US LEC of Maryland Inc |
240-233-8 | Washington | Charles | 146,551 | Bandwidth.com CLEC LLC - MD |
240-233-0 | Washington | Charles | 146,551 | Teleport Communications America LLC - DC |
240-234-0 | Annapolis Junction | Montgomery | 971,777 | Cellco Partnership dba Verizon Wireless - MD |
240-234-9 | Beltsville | Montgomery | 971,777 | Sprint Spectrum LP |
240-235 | Chevy Chase | Montgomery | 971,777 | Paetec Communications Inc - MD |
240-236-0 | Frederick | Frederick | 233,385 | Verizon Maryland Inc |
240-237-7 | Beltsville | St. Mary's | 105,151 | Omnipoint Communications Cap Operations LLC |
240-237-8 | Leonardtown | St. Mary's | 105,151 | IDT America Corporation - MD |
240-237-1 | Mc Lean | St. Mary's | 105,151 | US LEC of Maryland Inc |
240-237-3 | Washington | St. Mary's | 105,151 | Bandwidth.com CLEC LLC - MD |
240-237-9 | Washington | St. Mary's | 105,151 | Sprint Spectrum LP |
240-237-0 | Washington | St. Mary's | 105,151 | Teleport Communications America LLC - DC |
240-238 | Chevy Chase | Montgomery | 971,777 | Paetec Communications Inc - MD |
240-239 | Chevy Chase | St. Mary's | 105,151 | Core Communications Inc - MD |
240-241-3 | Beltsville | Prince George's | 863,420 | MetroPCS Inc |
240-241-0 | Lanham | Prince George's | 863,420 | Starpower Communications LLC - MD |
240-241-7 | Mc Lean | Prince George's | 863,420 | Level 3 Communications LLC - MD |
240-241-9 | Silver Spring | Prince George's | 863,420 | Peerless Network of Maryland LLC |
240-241-0 | Washington | Prince George's | 863,420 | Bandwidth.com CLEC LLC - MD |
240-241-6 | Washington | Prince George's | 863,420 | XO Maryland LLC |
240-242-4 | Alexandria | Montgomery | 971,777 | Comcast Phone of Northern Maryland Inc - MD |
240-242-0 | Lanham | Montgomery | 971,777 | Starpower Communications LLC - MD |
240-242-9 | Washington | Montgomery | 971,777 | Bandwidth.com CLEC LLC - MD |
240-242-6 | Washington | Montgomery | 971,777 | CTC Communications Corporation - MD |
240-243-0 | Washington | Montgomery | 971,777 | Allegiance Telecom of Maryland Inc |
240-244-5 | Alexandria | Prince George's | 863,420 | Comcast Phone of Northern Maryland Inc - MD |
240-244-4 | Washington | Prince George's | 863,420 | Cbeyond Communications LLC - MD |
240-245-4 | Alexandria | Prince George's | 863,420 | Comcast Phone of Northern Maryland Inc - MD |
240-245-7 | Washington | Prince George's | 863,420 | Bandwidth.com CLEC LLC - MD |
240-246-7 | Alexandria | Montgomery | 971,777 | Comcast Phone of Northern Maryland Inc - MD |
240-246-0 | Lanham | Montgomery | 971,777 | Starpower Communications LLC - MD |
240-247-7 | Beltsville | Montgomery | 971,777 | New Cingular Wireless PCS LLC - DC |
240-248 | Washington | St. Mary's | 105,151 | Peerless Network of Maryland LLC |
240-249-3 | Alexandria | St. Mary's | 105,151 | Comcast Phone of Northern Maryland Inc - MD |
240-249-8 | Mc Lean | St. Mary's | 105,151 | Level 3 Communications LLC - MD |
240-249-0 | Washington | St. Mary's | 105,151 | Teleport Communications America LLC - DC |
240-250 | Washington | Prince George's | 863,420 | Peerless Network of Maryland LLC |
240-251 | Frederick | Washington | 147,430 | Core Communications Inc - MD |
240-252-9 | Beltsville | Montgomery | 971,777 | New Cingular Wireless PCS LLC - DC |
240-253-2 | Alexandria | Prince George's | 863,420 | Comcast Phone of Northern Maryland Inc - MD |
240-253-6 | Washington | Prince George's | 863,420 | Bandwidth.com CLEC LLC - MD |
240-254-2 | Alexandria | Charles | 146,551 | Comcast Phone of Northern Maryland Inc - MD |
240-254-1 | Mc Lean | Charles | 146,551 | US LEC of Maryland Inc |
240-255 | Washington | Montgomery | 971,777 | Peerless Network of Maryland LLC |
240-256-5 | Beltsville | St. Mary's | 105,151 | New Cingular Wireless PCS LLC - DC |
240-256-1 | Mc Lean | St. Mary's | 105,151 | US LEC of Maryland Inc |
240-257-4 | Mc Lean | Charles | 146,551 | Level 3 Communications LLC - MD |
240-257-0 | Washington | Charles | 146,551 | Teleport Communications America LLC - DC |
240-258-0 | Damascus | St. Mary's | 105,151 | Core Communications Inc - MD |
240-258-6 | Mc Lean | St. Mary's | 105,151 | Level 3 Communications LLC - MD |
240-258-0 | Washington | St. Mary's | 105,151 | Teleport Communications America LLC - DC |
240-260 | Washington | Prince George's | 863,420 | Allegiance Telecom of Maryland Inc |
240-262-0 | Washington | St. Mary's | 105,151 | Sprint Spectrum LP |
240-263-0 | Beltsville | Montgomery | 971,777 | Sprint Spectrum LP |
240-264-6 | Alexandria | Prince George's | 863,420 | Comcast Phone of Northern Maryland Inc - MD |
240-264-4 | Washington | Prince George's | 863,420 | MCImetro Access Transmission Services LLC |
240-265-0 | Beltsville | Montgomery | 971,777 | Sprint Spectrum LP |
240-266 | Washington | Prince George's | 863,420 | Peerless Network of Maryland LLC |
240-268 | Washington | Montgomery | 971,777 | Allegiance Telecom of Maryland Inc |
240-269 | Washington | Prince George's | 863,420 | Peerless Network of Maryland LLC |
240-270-3 | Station Hills | Charles | 146,551 | Leap Wireless International Inc dba Cricket Communications Inc |
240-270-5 | Washington | Charles | 146,551 | Broadvox - CLEC LLC - DC |
240-271 | Beltsville | Montgomery | 971,777 | New Cingular Wireless PCS LLC - DC |
240-272-0 | Beltsville | Montgomery | 971,777 | Sprint Spectrum LP |
240-273-8 | Beltsville | Prince George's | 863,420 | Omnipoint Communications Cap Operations LLC |
240-273-0 | Washington | Prince George's | 863,420 | Broadwing Communications LLC - MD |
240-274 | Beltsville | Montgomery | 971,777 | New Cingular Wireless PCS LLC - DC |
240-275 | Frederick | Garrett | 30,097 | Core Communications Inc - MD |
240-276-0 | Gaithersburg | Montgomery | 971,777 | Verizon Maryland Inc |
240-277 | Beltsville | Montgomery | 971,777 | Sprint Spectrum LP |
240-278-0 | Annapolis Junction | Prince George's | 863,420 | Cellco Partnership dba Verizon Wireless - MD |
240-279 | Chevy Chase | Charles | 146,551 | Core Communications Inc - MD |
240-280-0 | Alexandria | Prince George's | 863,420 | Comcast Phone of Northern Maryland Inc - MD |
240-280-0 | Washington | Prince George's | 863,420 | XO Maryland LLC |
240-281 | Beltsville | Montgomery | 971,777 | New Cingular Wireless PCS LLC - DC |
240-282 | Washington | St. Mary's | 105,151 | Peerless Network of Maryland LLC |
240-283-0 | Chevy Chase | Montgomery | 971,777 | Paetec Communications Inc - MD |
240-284-1 | Cumberland | Allegany | 75,087 | IDT America Corporation - MD |
240-284-0 | Frederick | Allegany | 75,087 | Level 3 Communications LLC - MD |
240-285-0 | Frederick | Frederick | 233,385 | Cellco Partnership dba Verizon Wireless - MD |
240-286-0 | Beltsville | Montgomery | 971,777 | Sprint Spectrum LP |
240-287 | Frederick | Washington | 147,430 | Core Communications Inc - MD |
240-288-0 | Frederick | Frederick | 233,385 | Comcast Phone of Northern Maryland Inc - MD |
240-288-2 | Monrovia | Frederick | 233,385 | AT&T Local |
240-289-3 | Beltsville | Prince George's | 863,420 | Omnipoint Communications Cap Operations LLC |
240-290 | Washington | Montgomery | 971,777 | Allegiance Telecom of Maryland Inc |
240-291-7 | Frederick | Washington | 147,430 | Omnipoint Communications Cap Operations LLC |
240-292-5 | Laurel | Montgomery | 971,777 | tw telecom of maryland - MD |
240-292-9 | Washington | Montgomery | 971,777 | Bandwidth.com CLEC LLC - MD |
240-293-6 | Alexandria | Montgomery | 971,777 | Comcast Phone of Northern Maryland Inc - MD |
240-293-9 | Mc Lean | Montgomery | 971,777 | Level 3 Communications LLC - MD |
240-293-7 | Washington | Montgomery | 971,777 | Broadwing Communications LLC - MD |
240-294-7 | Alexandria | Prince George's | 863,420 | Comcast Phone of Northern Maryland Inc - MD |
240-294-5 | Washington | Prince George's | 863,420 | Paetec Communications Inc - MD |
240-295-3 | Alexandria | Prince George's | 863,420 | Comcast Phone of Northern Maryland Inc - MD |
240-295-2 | Laurel | Prince George's | 863,420 | Verizon Maryland Inc |
240-296-0 | Herndon | Prince George's | 863,420 | Cavalier Telephone Mid-Atlantic LLC - MD |
240-297-9 | Alexandria | Prince George's | 863,420 | Comcast Phone of Northern Maryland Inc - MD |
240-298 | Washington | St. Mary's | 105,151 | Cellco Partnership dba Verizon Wireless - MD |
240-299 | Washington | Charles | 146,551 | Sprint Spectrum LP |
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