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443 Area Code

Area code 443 serves Baltimore, Columbia, Ellicott City, Glen Burnie, Dundalk and nearby communities in Maryland. It has been in service since June 1, 1997, when it was split from 410.

StateMaryland
Time zoneEastern
Local time now…
Prefixes in use786
Overlay with410, 667
Projected to run out2036
BaltimoreColumbiaEllicott CityGlen BurnieDundalkSevernBel Air SouthTowsonOdentonCatonsvilleEssexAnnapolisSeverna ParkRandallstownOwings MillsPikesvilleSalisburyPasadenaMilford MillMiddle RiverBel Air NorthEldersburgParkvilleCroftonPerry HallCarneyReisterstownLochearnIlchesterElkridgeEdgewoodArnoldCockeysvilleArbutusRosedaleWestminsterAberdeenLake ShoreParoleEastonFerndaleElktonBrooklyn ParkHavre de GraceMays ChapelRossvilleCambridgeLexington ParkJoppatowneCaliforniaRiviera BeachAnnapolis NeckOverleaOcean PinesHoneygoTimoniumLinthicumBel AirWhite MarshFort MeadeGarrisonFallstonChesapeake Ranch EstatesJessupCape St. ClaireLansdowneEdgemereStevensvilleBaltimore HighlandsMayoEdgewaterTaneytownOcean CityBowleys QuartersLuthervilleChesapeake BeachHampsteadRiversideFruitlandAbingdonBaltimoreColumbiaBel Air SouthOdenton
Cities and towns served by area code 443

Who issues 443 numbers

Mobile 37%VoIP and cable 28%Landline 35%

Share of the 786 prefixes (the three digits after 443) assigned to each type of carrier. Classification by carrier name, approximate.

CarrierPrefixes
Paetec Itel153
Verizon Wireless121
T-Mobile95
Lumen (Level 3)74
AT&T Mobility71
Verizon56
Verizon Business (MCImetro)53
AT&T (Teleport)48

Cities and towns in area code 443

CityPopulationOther area codes
Baltimore569,997410, 667
Columbia105,871410, 667
Ellicott City73,737410, 667
Glen Burnie72,772410, 667
Dundalk65,441410, 667
Severn58,041410, 667
Bel Air South57,702410, 667
Towson57,683410, 667
Odenton45,585667, 410
Catonsville42,717410, 667
Essex40,670410, 667
Annapolis40,634410, 667
Severna Park39,499410, 667
Randallstown35,975410, 667
Owings Mills35,626410, 667
Pikesville34,253667, 410
Salisbury33,845410, 667
Pasadena32,717410, 667
Milford Mill31,939410, 667
Middle River31,616410, 667
Bel Air North31,599410, 667
Eldersburg30,626410, 667
Parkville30,423410, 667
Crofton29,878667, 410
Perry Hall28,908410, 667
Carney28,624410, 667
Reisterstown27,764410, 667
Lochearn27,591667, 410
Ilchester27,552410, 667
Elkridge26,183410, 667
Edgewood25,170410, 667
Arnold23,866410, 667
Cockeysville23,265410, 667
Arbutus20,869410, 667
Rosedale20,845410, 667
Westminster20,589410, 667
Aberdeen18,374667, 410
Lake Shore18,263410, 667
Parole17,910410, 667
Easton17,293410, 667

Showing the 40 largest of 80 places with 5,000+ residents.

Got a call from 443?

A 443 number was originally issued in Maryland, but that does not prove the caller is there. 28% of 443 prefixes belong to VoIP and cable providers, whose numbers can be bought online and used from anywhere. Caller ID can also be spoofed, so treat urgent requests for money, codes or passwords from any area code with suspicion, and call back on a number you already know.

All 786 prefixes in area code 443

Format: (443) XXX-YYYY. Carrier is the company the block was originally assigned to; numbers may since have been ported to another carrier.

Questions about area code 443

Where is area code 443?
Area code 443 is in Maryland. It covers Baltimore, Columbia, Ellicott City, Glen Burnie, Dundalk, Severn and 74 more cities and towns.
What time zone is area code 443?
Area code 443 is in the Eastern time zone.
Is 443 a toll-free number?
No. 443 is a geographic area code in Maryland. Toll-free numbers in the US start with 800, 833, 844, 855, 866, 877 or 888.
Why does 443 share its area with 410 and 667?
410, 443 and 667 form an overlay: they cover the same territory, so new numbers there can get any of these codes, and local calls need all 10 digits.
Will area code 443 run out of numbers?
NANPA's latest forecast projects the 410/443/667 overlay to exhaust in the first quarter of 2036. Before that happens, a new area code is usually added as an overlay; existing numbers keep their code.

Other area codes in Maryland