US hams were allowed to use a special prefix, instead of their normal one, throughout 1976, for the 1976 US Bicentennial celebrations.
Some of these prefix mappings are non-intuitive!
Some logging programs do not map these prefixes correctly.

Here is a list of the correct mappings:

Special Prefix Normal Prefix DXCC Note
AA WA USA  
AB WB USA  
AC W USA  
AD K USA  
AE WD USA  
AF WR USA Repeater
AK WN USA Novice
AG1 WW6 Wake I Novice
AG2 KB6 Baker & Howland Is  
AG3 WB6 Baker & Howland Is Novice
AG5 WG6 Guam Novice
AG6 KG6 Guam  
AG7 KW6 Wake I  
AH1 WH6 Hawaii Novice
AH2 WM6 Midway I Novice
AH3 KS6 American Samoa  
AH4 KS4 Serrana Bank & Roncador Cay (deleted)  
AH5 WS6 American Samoa Novice
AH6 KH6 Hawaii  
AH7 KM6 Midway I  
AI0 KP6 Palymyra I  
AJ1 WJ6 Johnston I Novice
AJ2 WV4 Virgin Is Novice
AJ3 KV4 Virgin Is  
AJ4 KP4 Puerto Rico  
AJ7 KJ6 Johnston I  
AJ8 WP4 Puerto Rico Novice
AL1 WL7 Alaska Novice
AL4 KC4 Navassa I  
AL7 KL7 Alaska