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The 301-312-XXXX area code prefix is located in Baltimore, Maryland including Indian Head, Chevy Chase and was originally put into service on February 4th 1994. Run a search and find out who's calling you now.

Recently Reported Numbers

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Recently Unidentified numbers

301 area code numbers that might be spam, scams or that people have reported as unidentified callers

301-312-4577Verizon Maryland
301-312-4993Mci Worldcom Communications
301-312-8620Verizon Maryland
301-312-1581Verizon Maryland
301-312-9459Verizon Maryland
301-312-5227Uscoc Of Cumberland DBA United States Cel Md
301-312-2132Verizon Maryland
301-312-8243Sprint Spectrum L.p.
301-312-4045Idt America Corp
301-312-9921Verizon Maryland
301-312-8443Verizon Maryland
301-312-5879Verizon Maryland
301-312-8702New Frontiers Telecommunications
301-312-9539Teleport Communications America - DC
301-312-2538Verizon Maryland
301-312-4576Level 3 Communications
301-312-8023Cellco Partnership DBA Verizon Wireless
301-312-3174Verizon Maryland
301-312-1617Cellco Partnership DBA Verizon Wireless

Most searched numbers

Cell
All TimeThis Month
301-312-2748First seen 2013-10-03301-312-8766First seen 2017-07-07
301-312-6934First seen 2017-12-27301-312-3987First seen 2018-05-16
301-312-6130First seen 2017-11-24301-312-9104First seen 2018-06-13
301-312-2748First seen 2017-02-13301-312-9842First seen 2019-06-28
301-312-2682First seen 2014-10-02301-312-8766First seen 2013-11-06
Landline
All TimeThis Month
301-312-7432First seen 2017-07-08301-312-5508First seen 2012-03-30
301-312-5054First seen 2010-09-02301-312-3191First seen 2011-07-23
301-312-7432First seen 2016-05-27301-312-8418First seen 2018-11-18
301-312-5846First seen 2014-02-24301-312-5359First seen 2015-01-16
301-312-2658First seen 2016-02-25301-312-1128First seen 2014-02-04

Cities With coverage

CITY LIST
Accident
Adamstown
Annapolis
Ashton
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Baltimore
Beltsville
Bethesda
Bittinger
Bowie
Brandywine
Brunswick
Bryans Road
Cabin John
Capitol Heights
Chevy Chase
Clear Spring
Clinton
College Park
Columbia
Cumberland
Damascus
Edgewater
Emmitsburg
Fort Washington
Frederick
Friendsville
Frostburg
Gaithersburg
Glen Echo
Glenn Dale
Grantsville
Greenbelt
Hagerstown
Hancock
Highfield
Hollywood
Hughesville
Hyattsville
Indian Head
Issue
Keedysville
Kensington
Kitzmiller
La Plata
Landover
Lanham
Laurel
Leonardtown
Lexington Park
Lonaconing
Mc Henry
Mccoole
Mechanicsville
Middletown
Monrovia
Mount Airy
Mount Rainier
Mount Savage
Myersville
Nanjemoy
New Market
North Beach
Oakland
Odenton
Oldtown
Oxon Hill
Patuxent River
Poolesville
Ridge
Rockville
Sandy Spring
Silver Spring
Smithsburg
Suitland
Swanton
Tall Timbers
Temple Hills
Thurmont
Upper Marlboro
Valley Lee
Waldorf
Walkersville
Westernport
Williamsport