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Glenn Dale, Maryland Area Code |
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Glenn Dale, MD Area Codes are 240, 301 |
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Glenn Dale, MD is currently using two area codes 240 and 301. In addition to Glenn Dale, MD, area codes 240 and 301
serves all of western Maryland. Glenn Dale, Maryland utilizes an area code overlay in which area codes 240 and 301 serve the same geographic area. The area code overlay which serves Glenn Dale, MD was put
into service on June 1, 1997 at which time area code 240 was created as an overlay of area code 301. Area code 301 originally covered the entire state of Maryland, including Glenn Dale when it was put into
service on June 1, 1947. Ten digit dialing (area code + seven digit number) is necessary in Glenn Dale, MD because two different homes in the same geographic area can have the same seven digit phone
number but each would have a different area code. |
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Maryland Area Codes |
240, 301, 410, 443 |
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