5 area codes assigned to Maryland · Eastern Time
240
Maryland
Eastern Time
301
Maryland
Eastern Time
410
Maryland
Eastern Time
443
Maryland
Eastern Time
667
Maryland
Eastern Time
Maryland is served by 5 area codes in the North American Numbering Plan (NANP): 240, 301, 410, 443, 667. All Maryland numbers are in the Eastern Time zone. Click any area code above to see the cities and rate centers it covers, formatted tel: link examples, and to search for available phone numbers.