20000 Zip Code - Enter city and state to see all the zip codes ™ for that city. Web zip code 20001 is located in central district of columbia and covers a slightly less than average land area compared to other zip. Web zip codes in kansas. Download the zip code database. Web in general, the irs underestimates the population of a zip as compared to zctas by 10% to 20% for two reason. Find by city & state.
Download the zip code database. Web zip code 20001 is located in central district of columbia and covers a slightly less than average land area compared to other zip. Web zip codes in kansas. Find by city & state. Enter city and state to see all the zip codes ™ for that city. Web in general, the irs underestimates the population of a zip as compared to zctas by 10% to 20% for two reason.