21017Belcamp, Maryland STANDARDActiveCountyHarford CountyArea code410, 443, 667TimezoneAmerica/New_YorkCoordinates39,47, -76,23
21018Benson, Maryland PO BOXActiveCountyHarford CountyArea code410TimezoneAmerica/New_YorkCoordinates39,51, -76,18
21020Boring, Maryland PO BOXActiveCountyBaltimore CountyArea code410TimezoneAmerica/New_YorkCoordinates39,57, -76,8
21022Brooklandville, Maryland PO BOXActiveCountyBaltimore CountyArea code410TimezoneAmerica/New_YorkCoordinates39,42, -76,67
21023Butler, Maryland PO BOXActiveCountyBaltimore CountyArea code410, 443, 667TimezoneAmerica/New_YorkCoordinates39,52, -76,74
21027Chase, Maryland PO BOXActiveCountyBaltimore CountyArea code410TimezoneAmerica/New_YorkCoordinates39,36, -76,37
21028Churchville, Maryland STANDARDActiveCountyHarford CountyArea code410, 443, 667TimezoneAmerica/New_YorkCoordinates39,56, -76,24
21029Clarksville, Maryland STANDARDActiveCountyHoward CountyArea code227, 240, 301, 410, 443, 667TimezoneAmerica/New_YorkCoordinates39,2, -76,94
21030Cockeysville, Maryland STANDARDActiveCountyBaltimore CountyArea code410, 443, 667TimezoneAmerica/New_YorkCoordinates39,47, -76,63
21031Hunt Valley, Maryland STANDARDActiveCountyBaltimore CountyArea code410, 443, 667TimezoneAmerica/New_YorkCoordinates39,49, -76,65
21032Crownsville, Maryland STANDARDActiveCountyAnne Arundel CountyArea code410, 443, 667TimezoneAmerica/New_YorkCoordinates39,01, -76,59
21034Darlington, Maryland STANDARDActiveCountyHarford CountyArea code410, 443, 667TimezoneAmerica/New_YorkCoordinates39,63, -76,2
21035Davidsonville, Maryland STANDARDActiveCountyAnne Arundel CountyArea code227, 240, 301, 410, 443, 667TimezoneAmerica/New_YorkCoordinates38,93, -76,63
21036Dayton, Maryland STANDARDActiveCountyHoward CountyArea code227, 240, 301, 410, 443, 667TimezoneAmerica/New_YorkCoordinates39,23, -77
21037Edgewater, Maryland STANDARDActiveCountyAnne Arundel CountyArea code410, 443, 667TimezoneAmerica/New_YorkCoordinates38,9, -76,54
21040Edgewood, Maryland STANDARDActiveCountyHarford CountyArea code410, 443, 667TimezoneAmerica/New_YorkCoordinates39,42, -76,29
21041Ellicott City, Maryland PO BOXActiveCountyHoward CountyArea code410TimezoneAmerica/New_YorkCoordinates39,27, -76,83
21042Ellicott City, Maryland STANDARDActiveCountyHoward CountyArea code410, 443, 667TimezoneAmerica/New_YorkCoordinates39,27, -76,83
21043Ellicott City, Maryland STANDARDActiveCountyHoward CountyArea code410, 443, 667TimezoneAmerica/New_YorkCoordinates39,26, -76,8
21044Columbia, Maryland STANDARDActiveCountyHoward CountyArea code227, 240, 301, 410, 443, 667TimezoneAmerica/New_YorkCoordinates39,21, -76,88
21045Columbia, Maryland STANDARDActiveCountyHoward CountyArea code410, 443, 667TimezoneAmerica/New_YorkCoordinates39,2, -76,85
21046Columbia, Maryland STANDARDActiveCountyHoward CountyArea code227, 240, 301, 410, 443, 667TimezoneAmerica/New_YorkCoordinates39,17, -76,84
21047Fallston, Maryland STANDARDActiveCountyHarford CountyArea code410, 443, 667TimezoneAmerica/New_YorkCoordinates39,52, -76,42
21048Finksburg, Maryland STANDARDActiveCountyCarroll CountyArea code410, 443, 667TimezoneAmerica/New_YorkCoordinates39,49, -76,88
21050Forest Hill, Maryland STANDARDActiveCountyHarford CountyArea code410, 443, 667TimezoneAmerica/New_YorkCoordinates39,58, -76,39