Howard County Brookeville – 20833 Glenelg – 21737 Mount Airy – 21771 Clarksvilie – 21029 Glenwood – 21738 Savage – 20763 Columbia – 21045 Hanover – 21076 Sykesvilie – 21784 Cooksville – 21723 Highland – 20777 West Friendship – 21794 Dayton – 21036 Jessup – 20794 Woodbine – 21797 Elk ridge – 21075 Laurel – 20723 Woodstock – 21163 Ellicott City – 21041 Lisbon – 21765 Fulton – 20759 Marriottsville – 21104