443 Area Code
Baltimore (overlay), Maryland
Area code 443 is located in Baltimore (overlay), Maryland. It covers Baltimore, Towson, and surrounding areas in the Eastern time zone (UTC-5). Administered by NANPA.
Where is area code 443?
Area code 443 is located in Baltimore (overlay), Maryland. It covers Baltimore, Towson, and surrounding areas in the Eastern time zone (UTC-5).
Cities Covered by Area Code 443
Area code 443 primarily serves the Baltimore (overlay) area of Maryland. The exact coverage includes Baltimore, Towson, and Columbia, along with surrounding communities and suburbs.
Time Zone
Eastern Time — UTC-5
Area code 443 operates in the Eastern Time Zone. When calling 443 numbers from a different time zone, be sure to account for the time difference to reach people during business hours.
About Area Code 443
Area code 443 was introduced in 1997 as a geographic area code serving Baltimore (overlay), Maryland. It remains the primary area code for this region. Area codes are administered by NANPA (North American Numbering Plan Administration), the organization responsible for managing phone number resources in the US and Canada.