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United States' Squadron and Group Codes, 500-599

Code Squadron Group Air Force Notes Aircraft
D7 503rd FS 339th FG 8th    
6N 504th FS 339th FG 8th    
5Q 505th FS 339th FG 8th    
GJ 506th BS 44th BG 8th    
4K 506th FS 404th FG 9th    
Y8 507th FS 404th FG 9th    
YB 508th BS 351st BG 8th    
7J 508th FS 404th FG 9th    
RQ 509th BS 351st BG 8th    
G9 509th FS 405th FG 9th    
2Z 510th FS 405th FG 9th    
DS 511th BS 351st BG 8th    
K4 511th FS 405th FG 9th    
  VMF-511     USS Block Island F6F-5N
  512th BS 376 BG 9th   B-24
L3 512th FS 406th FG 9th    
  513th BS 376 BG 9th   B-24
4P 513th FS 406th FG 9th    
  514th BS 376 BG 9th   B-24
O7 514th FS 406th FG 9th    
  515th BS 376 BG 9th   B-24
WA 524th BS 379th BG 8th    
FR 525th BS 379th BG 8th    
LF 526th BS 379th BG 8th    
FO 527th BS 379th BG 8th    
  VMF(N)-531     Banika Island, Solomon Islands PV-1N Ventura
VE 532nd BS 381st BG 8th    
  VMF(N)-532     Engebi Island, Eniwetok F4U-2
AN 533rd BS 386th BG 9th    
  VMF(N)-533     Ie Shima, Okinawa Hellcat
VP 533rd BS 381st BG 8th    
  VMF(N)-534     Guam  
GD 534th BS 381st BG 8th    
MS 535th BS 381st BG 8th    
  VMF(N)-541        
  VMF(N)-542     Yontan, Okinawa F6F-5N
  VMF(N)-543       Hellcat
SU 544th BS 384th BG 8th    
JD 545th BS 384th BG 8th    
BK 546th BS 381st BG 8th    
SO 547th BS 381st BG 8th    
  547th NFS     Pacific
Kills: 6
P-61
GX 548th BS 385th BG 8th    
  548th NFS     Ie Shima, Okinawa; Pacific P-61B
XA 549th BS 385th BG 8th    
  549th NFS     Pacific
Kills: 1
P-61
SG 550th BS 385th BG 8th    
  550th NFS       P-61
HR 551st BS 385th BG 8th    
DQ 551st FS 495th FG 8th    
RG 552nd BS 386th BG 8th    
RG 552nd BS 386th BG 9th    
VM 552nd FS 495th FG 8th    
AN 553rd BS 386th BG 8th    
RU 554th BS 386th BG 9th    
RU 554th BS 386th BG 8th    
B9 554th FS 496th FG 8th    
YA 555th BS 386th BG 8th    
YA 555th BS 386th BG 9th    
C7 555th FS 496th FG 8th    
FW 556th BS 387th BG 8th    
FW 556th BS 387th BG 9th    
KS 557th BS 387th BG 8th    
KS 557th BS 387th BG 9th    
KX 558th BS 387th BG 8th    
KX 558th BS 387th BG 9th    
TQ 559th BS 387th BG 9th    
TQ 559th BS 387th BG 8th    
YO 564th BS 389th BG 8th    
EE 565th BS 389th BG 8th    
RR 566th BS 389th BG 8th    
HP 567th BS 389th BG 8th    
P2 572nd BS 391st BG 9th    
T6 573rd BS 391st BG 9th    
4L 574th BS 391st BG 9th    
O8 575th BS 391st BG 9th    
CI 576th BS 392nd BG 8th    
DC 577th BS 392nd BG 8th    
GC 578th BS 392nd BG 8th    
EC 578th BS 392nd BG 8th    
K5 584th BS 394th BG 9th    
4T 585th BS 394th BG 9th    
H9 586th FS 394th FG 9th    
5W 587th BS 349th BG 9th    
X2 596th BS 397th BG 9th    
9F 597th BS 397th TCG 9th    
U2 598th BS 397th BG 9th    
6B 599th BS 397th BG 9th    
  • BG: Bomber Group
  • BS: Bomber Squadron
  • FG: Fighter Group
  • FS: Fighter Squadron
  • NF: Night Fighter
  • NFS: Night Fighter Squadron
  • OTU: Operational Training Unit
  • PG: Pathfinder Group
  • PS: Pathfinder Squadron
  • RG: Reconnaissance Group
  • RS: Reconnaissance Squadron
  • TCG: Troop Carrier Group
  • TCS: Troop Carrier Squadron
  • TRG: Training Group
  • TRS: Training Squadron
  • VF(N): Navy Night Fighter Squadron
  • VMF(N): Marine Corps Night Fighter Squadron

Sources:

  1. USAAF Handbook 1939 - 1945, Martin W. Bowman, 1997
  2. Mosquito Photo-Reconnaissance Units of World War 2, Martin Bowman, 1999
  3. American Nightfighter Aces of World War 2, Andrew Thomas, Warren Thompson, 2008
  4. P-61 Black Widow Units of World War 2, Warren Thompson, 2000
  5. SBD Dauntless Units of World War 2, Barrett Tillman, 1998
  6. The North African Air Campaign, Christopher Rein, 2012
20th Century American Military History Crucial Site