Author: Alan, 5B4AHJ
Prefixes of U.S. administered callsigns prior to WWII were very different to those in the post-WWII period.
However, the pre-WWII prefixes continued to be used for a short time after the end of WWII, and thus are of interest for Club Log.
As far as I can ascertain, new prefixes began to be issued in early 1946, and the changeover was largely complete before the end of 1947.
Known prefixes (this may not be a complete list), including Club Log mapping dates - log in to Club Log to view QSLs (not necessary for K8CX QSLs):
|Old prefix||Mapped until||QSL||New prefix||Mapped from||QSL||DXCC Entity||Notes & acknowledgements|
|K4||1946-12-31||K4JAU||KP4||1945-11-15||KP4AU||Puerto Rico||Tnx W2VRK|
|K5||Not QRV post WWII||N/A||KZ5||1945-11-15||KZ5AA||Canal Zone||Tnx W2VRK|
|K6||1946-12-31||W1MVF/K6||KH6||1946-07-01||KH6CN||Hawaii||Tnx Patrick Rigg, K8CX|
|K7||1946-12-31||W6QJW/K7||KL7||1945-11-15||KL7AD||Alaska||Tnx Patrick Rigg|
|K4, KB4||May not have been QRV post WWII||N/A||KV4||1945-11-15||KV4AA||US Virgin Islands||Tnx W2VRK, F5VHY|
|KB6||1946-06-30||W2LRI/KB6||KG6||1946-07-01||KG6AL||Mariana Islands, Guam||Tnx G4UZN, K8CX|
|KC6||Not mapped||QSL required||KW6||1945-11-15||W6VDG/KW6||Wake Island||Tnx Patrick Rigg.|
|KD4||Not QRV post WWII||N/A||KS4||1945-11-15||KS4AC||Swan Island||Tnx K8CX|
|KD6||1946-12-31||QSL required||KM6||1945-11-15||KM6AA||Midway Island||Tnx K8CX|
|KE6||1946-12-31||KE6/W9QMD||KJ6||1945-11-15||W6VID/KJ6||Johnston Island||Tnx W2VRK, Patrick Rigg|
|KB6||1946-07-01||KB6AD||Baker, Howland and American Phoenix Islands||Tnx Patrick Rigg, K8CX|
Tnx Patrick Rigg
KC6 may not have been used pre-WWII
|KG6||1946-06-30||QSL required||KP6||1945-11-15||KP6AB||Jarvis & Palmyra Island||Tnx Patrick Rigg|
|KH6||1946-06-30||QSL required||KS6||1945-11-15||W0OZW/KS6||American Samoa||W3LJL/KH6 QRV 1946. Tnx XTAL Magazine Vol 7, #8, October, 1946, K8CX|
|NY1, NY2||Not QRV post WWII||N/A||KZ5||See above||See above||Canal Zone|
|NY4||1949-12-31||NY4DD||KG4||1949-01-01||KG4AD||Guantanamo Bay||Tnx G4UZN. NY4DD became KG4AD sometime in the period 1949-03-26 to 1949-07-02|
The following is an extract from QST April, 1946:
The following is an extract from QST February, 1947:
The only prefixes for USA prior to 1947 were W[1-9], there was no W0 prefix.
ARRL/QST April, 1946
Stephen Emlyn-Jones, GW4BKG
Yahoo Groups: QSL Card Collectors
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