Annapolis, Maryland

Where Is Area Code 410?

Area code 410 is in Maryland. It serves much of the eastern and central part of the state, including Annapolis, the Eastern Shore, and the Baltimore metropolitan area outside Washington's suburban area codes.

Area code 410 covers major cities and communities such as Annapolis, Baltimore, Towson, Columbia, and Ocean City. It serves parts of central Maryland and much of eastern Maryland, including Anne Arundel County, Baltimore County, Harford County, Howard County, and many counties on the Eastern Shore.

Area code 410 also reaches well-known places such as the Chesapeake Bay region and Maryland's Atlantic coast. Notable landmarks in the 410 area include the Maryland State House in Annapolis, the United States Naval Academy, and parts of the Inner Harbor area in Baltimore.

History of Area Code 410

Area code 410 began service on October 6, 1991. It was created in a split from area code 301, which had covered all of Maryland before the split.

Area code 410 was the first new area code assigned to Maryland after 301. Because phone use kept growing, Maryland later added area code 443 as an overlay for the same region in 1997, and area code 667 as another overlay in 2012. Those overlays mean 10-digit dialing is used in the 410 region.

Key Facts About Area Code 410

• Area code 410 is a Maryland area code, and Annapolis is one of the major cities in its service area.
• Area code 410 serves the Eastern Time Zone.
• Area code 410 was created on October 6, 1991, in a split from Maryland's original area code 301.
• Area code 410 is not an original area code. It is a split area code.
• Area code 410 shares the same numbering plan area with overlays 443 and 667.
• Area code 410 serves Baltimore and Annapolis, two of Maryland's best-known cities.
• Area code 410 covers the home of the United States Naval Academy in Annapolis.
• Area code 410 includes communities along the Chesapeake Bay and parts of Maryland's Atlantic coast, including Ocean City.

Frequently Asked Questions

What state is area code 410 in?

Area code 410 is in Maryland.

What major cities use area code 410?

Major cities and communities in area code 410 include Annapolis, Baltimore, Towson, Columbia, and Ocean City.

Is area code 410 a toll-free number?

No. Area code 410 is a geographic area code.