Where is Zip Code 55577 map for 2020, 2019Primary Zip Codes for 55577Zip CodePrimary CitySecondary City55577RockfordCities sharing Zip Codes with 55577Zip CodePrimary CitySecondary CityMore Information55373RockfordRockford Rockford population stats 55572RockfordRockford Rockford population stats Advertisements