Area Code Overview

Area code 227 is a geographic telephone area code in Maryland that went into service on June 14, 2023. The geographic regions covered by this area code overlay has a population of approximately 1,658,076.

Overlay and Dialing Rules

Area Code: 227
State: Maryland
Type: General Purpose Code
In Service Date: June 14, 2023
Overlay Complex: 227/240/301
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 227

This area code is ranked 347th out of 363 nationwide in estimated assigned phone numbers. Within the state territory it serves, it is ranked 6th out of 6.

495,000

Estimated Service-Type Mix of Assigned Phone Numbers in Area Code 227

Total assigned 495,000

Wireless

314,000 assigned

63.43%

Wireline and VoIP

173,000 assigned

34.95%

Other / Unclassified

8,000 assigned

1.62%

Estimated Share of Wireless Numbers Originally Assigned to Each Carrier in Area Code 227

Estimated assigned wireless phone numbers: 314,000

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

AT&T Wireless 162,000 (51.59%)

T-Mobile 78,000 (24.84%)

Verizon Wireless 74,000 (23.57%)

Estimated Share of Wireline and VoIP Numbers Originally Assigned to Each Carrier in Area Code 227

Estimated assigned wireline and VoIP phone numbers: 173,000

Onvoy 79,000 (45.66%)

Commio 37,000 (21.39%)

Spectrum 14,000 (8.09%)

Bandwidth 13,000 (7.51%)

MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD 6,000 (3.47%)

NUSO 6,000 (3.47%)

TERRA NOVA TELECOM INC. 5,000 (2.89%)

MCIMETRO ACCESS TRANSMISSION SERVICES LLC 4,000 (2.31%)

Telnyx 4,000 (2.31%)

AT&T 2,000 (1.16%)

Wide Voice 2,000 (1.16%)

Peerless Network 1,000 (0.58%)

Other / Unclassified Assigned Numbering in Area Code 227

Estimated assigned other or unclassified phone numbers: 8,000

HD CARRIER LLC 5,000 (62.50%)

CALLWORKS CORPORATION 1,000 (12.50%)

OPENTACT INC. 1,000 (12.50%)

WAVENATION, LLC 1,000 (12.50%)

Cities and Towns in Area Code 227

Ashton, Maryland Baltimore, Maryland Bittinger, Maryland Brandywine, Maryland Brunswick, Maryland Buckeystown, Maryland Clear Spring, Maryland Cumberland, Maryland Damascus, Maryland Emmitsburg, Maryland Flintstone, Maryland Frederick, Maryland Friendsville, Maryland Frostburg, Maryland Gaithersburg, Maryland Grantsville, Maryland Hagerstown, Maryland Hancock, Maryland Highfield, Maryland Hughesville, Maryland Indian Head, Maryland Keedysville, Maryland Kitzmiller, Maryland La Plata, Maryland Laurel, Maryland Leonardtown, Maryland Lexington Park, Maryland Lonaconing, Maryland Mccoole, Maryland Mechanicsville, Maryland Middletown, Maryland Mount Airy, Maryland Mount Savage, Maryland Myersville, Maryland Nanjemoy, Maryland New Market, Maryland Oakland, Maryland Poolesville, Maryland Ridge, Maryland Smithsburg, Maryland Thurmont, Maryland Tompkinsville, Maryland Waldorf, Maryland Walkersville, Maryland Westernport, Maryland Williamsport, Maryland

These geographic regions are also served by area codes 240 and 301.

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 227, 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