รหัสไปรษณีย์Colorado (CO)
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64Adams County 26Alamosa County 4Arapahoe County 28Archuleta County 4Baca County 6Bent County 4Boulder County 27Broomfield County 1Chaffee County 6Cheyenne County 4Clear Creek County 5Conejos County 7Costilla County 5Crowley County 5Custer County 2Delta County 9Denver County 55Dolores County 3Douglas County 15Eagle County 13El Paso County 66Elbert County 6Fremont County 11Garfield County 8Gilpin County 3Grand County 8Gunnison County 10Hinsdale County 1Huerfano County 3Jackson County 4Jefferson County 33Kiowa County 4Kit Carson County 6La Plata County 7Lake County 3Larimer County 24Las Animas County 9Lincoln County 6Logan County 8Mesa County 19Mineral County 1Moffat County 7Montezuma County 8Montrose County 10Morgan County 8Otero County 6Ouray County 2Park County 10Phillips County 4Pitkin County 6Prowers County 5Pueblo County 17Rio Blanco County 2Rio Grande County 4Routt County 9Saguache County 6San Juan County 1San Miguel County 5Sedgwick County 3Summit County 5Teller County 6Washington County 6Weld County 39Yuma County 7