AI Receptionist with
410 Area Code
for Baltimore Businesses

The 410 area code serves eastern Maryland including Baltimore, Annapolis, and the Eastern Shore. Established in 1991, it operates with overlays 443 and 667, requiring 10-digit dialing for all calls.

The 410 area code was created in 1991 when Maryland's original 301 area code was split due to rapid population growth and increasing demand for telephone numbers. The split separated eastern Maryland, including Baltimore and the Eastern Shore, from western Maryland. This division reflected the state's distinct geographic and economic regions. As the Baltimore metropolitan area continued expanding through the 1990s and 2000s, the 410 code faced exhaustion, leading to the introduction of overlay codes 443 in 1997 and 667 in 2012. These overlays allow new phone numbers to be assigned without requiring existing customers to change their numbers. Today, all three codes serve the same geographic region, requiring 10-digit dialing for all local calls. The 410 area code covers approximately 4.3 million residents across eastern Maryland's diverse communities, from urban Baltimore to rural Eastern Shore towns.