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Maryland Area Codes

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State: Maryland (MD)
Area Codes: 5
Timezone: Eastern (EDT)
Current Time: 9:46 PM

About Maryland Area Codes

Maryland (MD) uses 5 telephone area codes to serve its residents and businesses. With an estimated population of 6,840,820, Maryland is one of the smaller states in the North American Numbering Plan (NANP). The state is primarily in the Eastern Time Zone (EDT). The current local time in Maryland is 9:46 PM.

The largest cities in Maryland include Baltimore (pop. 2,106,068), Hagerstown (pop. 184,755), Frederick (pop. 156,787), Salisbury (pop. 106,447) and Columbia (pop. 103,991) . Maryland has 24 counties spread across its territory. Each area code in MD covers a geographic region of the state, with some areas using overlay codes that share the same geographic territory as an existing area code.

When calling a Maryland phone number from outside the area code, you must dial the full 10-digit number: the 3-digit area code followed by the 7-digit local number. Many parts of Maryland now require 10-digit dialing even for local calls due to overlay area codes and the nationwide 988 Suicide & Crisis Lifeline implementation.

All Maryland Area Codes

The table below lists every active area code in Maryland, along with the major city served and other cities covered by each code.

Area Code Major City Other Cities
240 Baltimore Hagerstown, Frederick, Columbia, Germantown, Silver Spring, Rockville, Gaithersburg, Bethesda and more
301 Baltimore Hagerstown, Frederick, Columbia, Germantown, Silver Spring, Waldorf, Rockville, Gaithersburg and more
410 Baltimore Salisbury, Columbia, Ellicott City, Glen Burnie, Dundalk, Towson, Odenton, Catonsville and more
443 Baltimore Salisbury, Columbia, Glen Burnie, Dundalk, Towson, Odenton, Catonsville, Woodlawn and more
667 Baltimore Salisbury, Columbia, Pikesville, Laurel, Easton, Chestertown, Vienna, Arlington

Largest Cities in Maryland

These are the largest cities in Maryland by population, along with their primary area codes and counties.

City Population County
Baltimore 2,106,068 Baltimore City
Hagerstown 184,755 Washington County
Frederick 156,787 Frederick County
Salisbury 106,447 Wicomico County
Columbia 103,991 Howard County
Germantown 90,582 Montgomery County
Silver Spring 81,773 Montgomery County
Waldorf 75,489 Charles County
Ellicott City 72,665 Howard County
Glen Burnie 69,872 Anne Arundel County

Frequently Asked Questions

Maryland has 5 active area codes. These include 240 (Baltimore), 301 (Baltimore), 410 (Baltimore), 443 (Baltimore) and 667 (Baltimore) .

Maryland is primarily in the Eastern Time Zone (EDT). The current local time is 9:46 PM.

The area code covering the most cities in Maryland is 410, which serves Baltimore and 106+ other communities.

Yes, most areas in Maryland now require 10-digit dialing (area code + 7-digit number) for all local calls. This requirement was implemented across the United States starting in October 2021 to support the 988 Suicide & Crisis Lifeline. Even if you are calling within the same area code, you need to dial all 10 digits.

To call a Maryland number from within the United States, dial the area code followed by the 7-digit phone number (e.g., 240-XXX-XXXX). From outside the US, dial your country's exit code, then 1 (the US country code), then the full 10-digit number.

Maryland has 24 counties. The state's total estimated population is 6,840,820, spread across these counties and served by 5 area codes.

Baltimore is served by area code 240. Maryland has 5 area codes in total — see the complete list above.
Maryland at a Glance
  • Abbreviation MD
  • Area Codes 5
  • Population 6,840,820
  • Counties 24
  • Cities 510
  • Time Zone Eastern
  • Current Time 9:46 PM
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