why can’t I get information on airport Y70 (Ionia Michigan) even if using C or K prefix? It doesn’t recognize the code.
Welcome to the forum wbeswick! 8)
Because Y70 isn’t an ICAO airport. Y70 is the FAA identifier. Adding K (or C for that matter) doesn’t make it an ICAO code. If you SEARCH the forum (top of the screen) you will find this question has already been answered.
Which does nothing to answer the question. The airport identifier box here on FA does show KY70 as the identifier for Ionia if you type in the airport name but then says it’s invalid if you try to display the airport information.
Again, the advice given about using the search feature will help the original poster.