HWA - Hawaii Islands :

ARINC Honolulu HWA-61
Honolulu Aero HWA-62
Honolulu Meteo (KVM70) HWA-39
Honolulu Volmet HWA-63
Kahalelani Radio (KEJ) HWA-51
  Kahuku Radio (KHK) HWA-73
NIST Kekaha (WWVH) HWA-33
  NDB Lanai *LLD HWA-77
SailMail Honolulu (KUZ533) HWA-70
USAF Hickam AFB HWA-23
USAF Honolulu HWA-54
USCG Honolulu HWA-66
  USCG LORAN Johnston Island HWA-58
USNy Johnston Island HWA-59
USNy Pearl Harbor (NPM) HWA-43