Adelphi, Maryland
Area codes 227, 240, 301 · Population: 15,086
Eastern (ET)
Maryland
Pop. 15,086
Area Codes Serving Adelphi
About Adelphi, Maryland
Adelphi is a city in Maryland that is served by area codes 227, 240, 301. The city has a population of approximately 15,086 residents and is located in the Eastern Time Zone.