Similar to M23

03SC - Seacoast Medical Center Heliport, Little River, South Carolina USA
03Y - former code for Hallock Municipal Airport, Hallock, Minnesota USA
04A - Frank Sikes Airport, Luverne, Alabama USA
04F - De Leon Municipal Airport, De Leon, Texas USA
04G - Lansdowne Airport, Youngstown, Ohio USA
04I - Columbus Southwest Airport, Columbus, Ohio USA
04J - former code for Darlington County Jetport, Darlington, South Carolina USA now UDG

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