In a new column too the righ, put the fomular
If Column B is:
4800= Langley
5000=Elmendorf
5260 = Hickam
6530= Hickam
4852=Nellis
2823-Eglin
4819-Tindall
2850-Edwards
If its none of those numbers above = "NA"
In Column L:Condition Formatting
Highlight in GREEN COLOR all "1A" and "JA"