Area Code 410 Location

Area code 410 serves Annapolis, Maryland, and much of central and eastern Maryland, including the Baltimore area and communities along the Chesapeake Bay. It links the state capital to major population centers and coastal towns on the Eastern Shore, making it one of the most recognized Maryland phone prefixes. If you see a 410 phone number, the call is usually from the Baltimore–Annapolis–Eastern Shore region in the Eastern Time (ET) zone.

Major cities and communities in the 410 area include:

• Baltimore
• Annapolis
• Towson
• Columbia
• Glen Burnie
• Dundalk
• Ellicott City
• Ocean City
• Salisbury

This area code covers key landmarks like the U.S. Naval Academy and the Maryland State House in Annapolis, plus Baltimore’s Inner Harbor, Fort McHenry, and Oriole Park at Camden Yards. It also encompasses travel corridors across the Chesapeake Bay Bridge, connecting the capital region to the Eastern Shore. These sites highlight the region’s maritime history, government activity, and sports culture, all reachable by 410 numbers.

History and dialing: Area code 410 was created in a split from 301 to handle demand in the Baltimore–Annapolis area, and later received overlays 443 and 667. Because of these overlays, 10-digit dialing is standard across the region, and new phone numbers may use 443 or 667 while long-time lines still show 410. You’ll find 410 on mobile phones, landlines, and business numbers across central Maryland and the Eastern Shore.

Established: October 6, 1991 — split from 301 (Source: North American Numbering Plan Administration)