Similar to OPSR

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
04LS - Louisiana National Guard Heliport, Baton Rouge, Louisiana USA
04M - Calhoun County Airport, Pittsboro, Mississippi USA
04NC - Western Wake Medical Center Heliport, Cary, North Carolina USA
04Q - Christensen Ranch Airport, Hollister, California USA

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