Area Code Overview

Area code 410 is a geographic telephone area code in Maryland that went into service on October 6, 1991. The geographic regions covered by this area code overlay has a population of approximately 1,797,325.

Overlay and Dialing Rules

Area Code: 410
State: Maryland
Type: General Purpose Code
In Service Date: October 6, 1991
Overlay Complex: 410/443/667
Local Dialing Plan: This area does require you to dial the area code when calling locally.

Estimated Number of Assigned Phone Numbers in Area Code 410

This area code is ranked 107th out of 363 nationwide in estimated assigned phone numbers. Within the state territory it serves, it is ranked 2nd out of 6.

6,083,000

Estimated Service-Type Mix of Assigned Phone Numbers in Area Code 410

Total assigned 6,083,000

Wireless

1,554,000 assigned

25.55%

Wireline and VoIP

3,929,000 assigned

64.59%

Other / Unclassified

600,000 assigned

9.86%

Estimated Share of Wireless Numbers Originally Assigned to Each Carrier in Area Code 410

Estimated assigned wireless phone numbers: 1,554,000

Numbers may later be ported to another carrier, but this chart reflects original number assignment, not current subscriber share.

Verizon Wireless 590,000 (37.97%)

AT&T Wireless 557,000 (35.84%)

T-Mobile 407,000 (26.19%)

Estimated Share of Wireline and VoIP Numbers Originally Assigned to Each Carrier in Area Code 410

Estimated assigned wireline and VoIP phone numbers: 3,929,000

VERIZON MARYLAND, INC. 2,832,000 (72.08%)

Onvoy 230,000 (5.85%)

Lumen 143,000 (3.64%)

Bandwidth 140,000 (3.56%)

PAETEC ITEL, LLC 133,000 (3.39%)

Comcast Business 112,000 (2.85%)

MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD 69,000 (1.76%)

BALTIMORE-WASHINGTON TELEPHONE (BWT) 48,000 (1.22%)

Spectrum 47,000 (1.20%)

Peerless Network 45,000 (1.15%)

TERRA NOVA TELECOM INC. 36,000 (0.92%)

Telnyx 31,000 (0.79%)

Other / Unclassified Assigned Numbering in Area Code 410

Estimated assigned other or unclassified phone numbers: 600,000

SPOK, INC. 280,000 (46.67%)

CORE COMMUNICATIONS, INC.- MD 131,000 (21.83%)

TELEPORT COMMUNICATIONS AMERICA, LLC - MD 58,000 (9.67%)

REDI-CALL COMMUNICATIONS CO. 30,000 (5.00%)

VDL, INC. DBA GLOBAL TELECOM BROKERS - MD 26,000 (4.33%)

AMERICAN MESSAGING SERVICES, LLC 20,000 (3.33%)

IDT AMERICA, CORP. - MD 18,000 (3.00%)

IP HORIZON LLC 11,000 (1.83%)

ARMSTRONG TEL. CO. OF MARYLAND 10,000 (1.67%)

HD CARRIER LLC 6,000 (1.00%)

BARR TELL USA, INC. 5,000 (0.83%)

MCC TELEPHONY OF THE MID-ATLANTIC, LLC - MD 5,000 (0.83%)

Cities and Towns in Area Code 410

Aberdeen, Maryland Annapolis, Maryland Arbutus, Maryland Baltimore, Maryland Bel Air, Maryland Berlin, Maryland Bishopville, Maryland Brooklyn Park, Maryland Cambridge, Maryland Cardiff, Maryland Catonsville, Maryland Cecilton, Maryland Centreville, Maryland Chase, Maryland Chesapeake City, Maryland Chestertown, Maryland Church Hill, Maryland Churchville, Maryland Cockeysville, Maryland Columbia, Maryland Crisfield, Maryland Crofton, Maryland Darlington, Maryland Deal Island, Maryland Delmar, Maryland Denton, Maryland Dundalk, Maryland Easton, Maryland Edgewood, Maryland Elkridge, Maryland Elkton, Maryland Ellicott City, Maryland Essex, Maryland Fallston, Maryland Federalsburg, Maryland Galena, Maryland Gibson Island, Maryland Glen Burnie, Maryland Glenwood, Maryland Greensboro, Maryland Hampstead, Maryland Havre de Grace, Maryland Hillsboro, Maryland Hurlock, Maryland Jarrettsville, Maryland Marion, Maryland Millersville, Maryland Millington, Maryland Nanticoke, Maryland New Windsor, Maryland North Beach, Maryland North East, Maryland Ocean City, Maryland Odenton, Maryland Oxford, Maryland Parkton, Maryland Parkville, Maryland Perryville, Maryland Pikesville, Maryland Pocomoke City, Maryland Port Deposit, Maryland Preston, Maryland Prince Frederick, Maryland Princess Anne, Maryland Queenstown, Maryland Randallstown, Maryland Reisterstown, Maryland Ridgely, Maryland Rising Sun, Maryland Rock Hall, Maryland Saint Michaels, Maryland Salisbury, Maryland Severn, Maryland Severna Park, Maryland Sharptown, Maryland Sherwood Forest, Maryland Silver Run, Maryland Smith, Maryland Snow Hill, Maryland Solomons, Maryland Sparks Glencoe, Maryland Sparrows Point, Maryland Stevensville, Maryland Still Pond, Maryland Sudlersville, Maryland Sykesville, Maryland Taneytown, Maryland Tilghman, Maryland Towson, Maryland Trappe, Maryland Union Bridge, Maryland Vienna, Maryland Warwick, Maryland Waterloo, Maryland West River, Maryland Westminster, Maryland Willards, Maryland Wingate, Maryland Woodlawn, Maryland Worthington, Maryland

These geographic regions are also served by area codes 443 and 667.

How These Figures Were Built

These figures are estimates based on public phone-number assignment records. They are meant to show the likely mix of assigned phone numbers associated with area code 410, not live customer counts.

Some providers may have assigned phone numbers tied to this area code even if they do not actively market or sell service locally. These figures reflect public number-assignment records, not confirmed local service availability.

They also do not reflect number portability at the individual phone-number level, so some numbers may now be used on a different network or by a different provider than the original assignment records suggest.

Population data and locality matching provided by GeoNames.

Last refreshed: April 15, 2026 6:22 pm