Buy a Local Phone Number – Area Code 443 (Baltimore, Maryland)

Maryland’s original 301 once covered the entire state; a 1991 split created 410 for Baltimore and the central Chesapeake corridor. As pagers and mobile phones proliferated and suburbs in Anne Arundel, Howard, and Harford counties expanded, an overlay was introduced in the late 1990s: 443, with mandatory ten‑digit dialing. Number demand continued into the next decade, prompting the addition of 667 in 2012. These overlays preserved existing assignments while accommodating growth tied to the seaport economy, defense installations, and university‑anchored research centers.

Telecommunications here track a metropolitan area that blends maritime labor traditions with knowledge‑economy clusters. The Port of Baltimore moves autos and bulk cargo; Johns Hopkins and the University of Maryland drive medicine and science; and nearby Fort Meade and Aberdeen Proving Ground underpin cybersecurity and systems engineering. Cultural markers—Chesapeake seafood, rowhouse neighborhoods, and an influential arts scene—frame everyday usage across city and commuter belts.

• Port logistics and auto imports/exports
• Healthcare, education, and biomedical research
• Defense, cybersecurity, and electronics
• Tourism, sports, and waterfront arts