Upper Marlboro Area Codes

Here is the current list of area codes in Upper Marlboro, MD. There is currently 2 area code(s) in Upper Marlboro. Search all the most up-to-date currently used Upper Marlboro area codes below.

Eastern time zone
Current Time in Upper Marlboro: 11:37 AM
Area Code State City Timezone
240MarylandUpper MarlboroEastern
301MarylandUpper MarlboroEastern