According to their website 10 fast this is probably old information.
B737-200 N249TR 122 Coach; Winston-Salem, NC (INT)
B737-200 N250TR 112 All Leather Coach; Winston-Salem, NC (INT)
B737-200
N251TR 52 First Class or 122 Coach; Winston-Salem, NC (INT)
B737-200
N252TR 112 All Leather Coach; Winston-Salem, NC (INT)
B737-300 N373PA 64 First Class or 148 Coach; Phoenix, AZ (PHX)
B737-300
N375PA 52 First Class or 148 Coach; Phoenix, AZ (PHX)
B737-200
N583CC 38 First Class; Cleveland, OH (CLE)
B737-400
N737DX 72 First Class; Phoenix, AZ (PHX)
B757-200
N757BJ 100 Total; Phoenix, AZ (PHX)
B757-200
N801DM - 63 First Class; Dallas, TX (DAL)