This service corrects U.S. addresses, provides geocoding (U.S. down to address level and Canadian to Postal Code Level), and allows you to convert zip codes (and Canadian Postal Codes) to city and state names. We also offer PMSA, CMSA, and various other codes. <b>BE SURE TO USE A LICENSE KEY OF 0 FOR TESTING.</b> This method is called by all Standard Address Routines and allows more interaction with the address system. This method is called by all advanced address checking methods and allows for a deeper interface with the address correction. Checks a zipcode and returns City, State, Lat, Long and more. The latitude and longitude will be more precise with a plus 4. We have added Canadian Postal Codes to this mix. This is the only function that will pull Canadian Geo and City information. This method checks an address with 1 line and only returns 1 match. This method checks an address with 2 lines and only returns 1 possible match. This method checks an address with 2 lines and returns all possible matches. Views the latest version information Calculates the distance between two areas using longitude and latitude. This is calculated using spherical geometry. This is a free function. You can get the calculations behind this function via support@cdyne.com . Returns all possible city names for a zipcode as an array Returns all possible zipcodes for a city/state combination. <b>For this function to work you must put true or false in IgnoreBadCitySpelling</b>. That flag will allow you to have cities zipcodes that have the city name spelled incorrectly. This function is far more accurate with that flag set to false. Use a licensekey of 0 for testing. Returns a Congressional District by ZipCode. Use a licensekey of 0 for testing. Checks a zipcode and returns City, State, Lat, Long and more. The latitude and longitude will be more precise with a plus 4. We have added Canadian Postal Codes to this mix. This is the only function that will pull Canadian Geo and City information. This method checks an address with 1 line and only returns 1 match. This method checks an address with 2 lines and only returns 1 possible match. This method checks an address with 2 lines and returns all possible matches. Views the latest version information Calculates the distance between two areas using longitude and latitude. This is calculated using spherical geometry. This is a free function. You can get the calculations behind this function via support@cdyne.com . Returns all possible city names for a zipcode as an array Returns all possible zipcodes for a city/state combination. <b>For this function to work you must put true or false in IgnoreBadCitySpelling</b>. That flag will allow you to have cities zipcodes that have the city name spelled incorrectly. This function is far more accurate with that flag set to false. Use a licensekey of 0 for testing. Returns a Congressional District by ZipCode. Use a licensekey of 0 for testing. Checks a zipcode and returns City, State, Lat, Long and more. The latitude and longitude will be more precise with a plus 4. We have added Canadian Postal Codes to this mix. This is the only function that will pull Canadian Geo and City information. This method checks an address with 1 line and only returns 1 match. This method checks an address with 2 lines and only returns 1 possible match. This method checks an address with 2 lines and returns all possible matches. Views the latest version information Calculates the distance between two areas using longitude and latitude. This is calculated using spherical geometry. This is a free function. You can get the calculations behind this function via support@cdyne.com . Returns all possible city names for a zipcode as an array Returns all possible zipcodes for a city/state combination. <b>For this function to work you must put true or false in IgnoreBadCitySpelling</b>. That flag will allow you to have cities zipcodes that have the city name spelled incorrectly. This function is far more accurate with that flag set to false. Use a licensekey of 0 for testing. Returns a Congressional District by ZipCode. Use a licensekey of 0 for testing. This service corrects U.S. addresses, provides geocoding (U.S. down to address level and Canadian to Postal Code Level), and allows you to convert zip codes (and Canadian Postal Codes) to city and state names. We also offer PMSA, CMSA, and various other codes. <b>BE SURE TO USE A LICENSE KEY OF 0 FOR TESTING.</b>