Acronyms, Abbreviations, and Initialisms.
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The meaning of the Acronym 21F is...

21F is

  • Jacksboro Municipal Airport, Jacksboro, Texas USA

21F is also in:

Acronym Definition Searched: 81074 P ASTC BCS MS JIP PE SCC TUTS NWO NCCS PBR NI GSE ABACF