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White Oak, Maryland Area Code Information |
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White Oak, MD Area Codes are 240, 301 |
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White Oak, MD is currently using two area codes 240 and 301. In addition to White Oak, MD, area codes 240 and 301 serves
all of western Maryland. White Oak, Maryland utilizes an area code overlay in which area codes 240 and 301 serve the same geographic area. The area code overlay which serves White Oak, 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 White Oak when it was put into service
on June 1, 1947. Ten digit dialing (area code + seven digit number) is necessary in White Oak, 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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