Prosečne GPS koordinate za poštanski broj 20773: 38.834, -76.878
Spisak gradova:
>> Upper Marlboro 20773, Maryland, Prince George's, GPS koordinate: 38.8336,-76.8777
Spisak gradova:
>> Upper Marlboro 20773, Maryland, Prince George's, GPS koordinate: 38.8336,-76.8777