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Maryland area codes

Maryland uses 6 area codes. Open any of them for the map, carriers and prefixes.

All area codes in Maryland

Main city and overlays for each code.

AREA CODE 227 Washington Overlay with 240, 301 AREA CODE 240 Washington Overlay with 227, 301 AREA CODE 301 Washington Overlay with 227, 240 AREA CODE 410 Baltimore Overlay with 443, 667 AREA CODE 443 Baltimore Overlay with 410, 667 AREA CODE 667 Baltimore Overlay with 410, 443

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