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Area Codes in Maryland

Explore area codes connected to ZIP codes in Maryland. Use this page to move between area code lookup, ZIP code coverage, and state-level browsing.

View ZIP codes in Maryland Browse all area codes
State
Maryland
MD
ZIP codes
605
Population
5,834,284
410
Maryland
ZIPs 316
Cities 246
Pop. 3,090,416
301
Maryland
ZIPs 289
Cities 186
Pop. 2,743,868

About area codes in Maryland

Area codes in Maryland connect phone numbering geography with ZIP code regions, cities, and local coverage. Use the cards above to open each area code page, then continue to the related ZIP code pages for deeper postal lookup.