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Maryland Area Codes – Complete List and Guide

Maryland, known for its historical significance and vibrant culture, is home to 24 countiesand 3 active area codesthat span its bustling cities, suburban neighborhoods, and serene coastal regions. Whether you're looking to trace a call, understand which area code corresponds to a specific city, or simply want to learn more about Maryland area codes, this guide will provide you with all the essential details.

Maryland’s area codes serve a variety of regions, from the metropolitan areas of Baltimore and Washington, D.C., to the quieter rural communities on the Eastern Shore. Some of the most common Maryland area codes include 301, 410, and 240, each covering distinct areas of the state. Understanding Maryland's area codes helps you explore the state’s diverse regions and communities.

Popular Maryland Area Codes

• 301– Serving the western and central parts of Maryland, including cities like Silver Spring, Frederick, and Hagerstown.
• 410– Covering the eastern part of Maryland, including Baltimore, Annapolis, and the Eastern Shore.
• 240– A newer overlay for the 301 area code, covering the same region of western and central Maryland, including the suburbs of Washington, D.C.

Each of these area codes represents Maryland's unique geography, from the urbanized areas near the nation's capital to the more tranquil towns along the Chesapeake Bay. For more detailed information about the counties, cities, and area codes across Maryland, MDPhoneLookup.comoffers easy access to area code lists, searchable databases, and more. Use our tool to quickly look up any phone number, trace its origin, and get detailed results in seconds. Start exploring Maryland’s area codes today and uncover the details behind every call!

Below is a comprehensive list of all active Maryland area codes, organized in numerical order

• 240 Area Code– Serves the western and central parts of Maryland, including Rockville, Frederick, Gaithersburg, and parts of Montgomery and Frederick counties.
• 301 Area Code– Covers the southern and western areas of Maryland, including cities like Silver Spring, Bowie, Waldorf, and Hagerstown.
• 410 Area Code– Serves the eastern and central parts of Maryland, including Baltimore, Annapolis, Salisbury, and counties such as Baltimore, Howard, and Anne Arundel.
• 443 Area Code– An overlay for the 410 area code, covering the same regions of Maryland, including Baltimore, Annapolis, and parts of the Eastern Shore.
• 667 Area Code– Another overlay for the 410 area code, covering cities like Baltimore, Salisbury, and parts of central and eastern Maryland.

Top 30 Cities in Maryland by Population

Top 20 Counties in Maryland by Population

Geography and Demographics of Maryland

Maryland, one of the smallest states in the U.S., packs a remarkable amount of diversity and economic strength into its borders. With a population of over 6 million people, Maryland is strategically located in the Mid-Atlantic region, bordered by Pennsylvania to the north, Delaware to the east, Virginia to the south, and West Virginia to the west. The state covers 12,407 square miles and features landscapes ranging from the Chesapeake Bay and Atlantic coastline in the east to the Appalachian Mountains in the west.

Maryland is an economic powerhouse with strengths in technology, healthcare, education, and defense. It’s home to major federal agencies like the NIH and NSA, plus research institutions like Johns Hopkins University. The Port of Baltimore, a thriving biotech sector, and a strong defense contracting presence make Maryland one of the wealthiest states by median household income.

Cultural diversity thrives here, reflecting its history as a crossroads between the North and South. Maryland played a key role in the founding of the nation and the Civil War, and continues to influence government growth around Washington, D.C. The Baltimore-Washington metro is one of the most dynamic areas in the country, with diverse suburban and urban communities.

From the historic streets of Annapolis to the rural landscapes of Western Maryland, the state offers a blend of commerce, culture, and natural beauty. Whether it’s maritime heritage along the Chesapeake or the bustling hubs near D.C., Maryland remains a vibrant part of the nation.

Maryland Quick Facts: Everything You Need to Know