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||New prefix|
|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
This page may contain information that is the copyright property of a third party. Images or other material displayed on this page is done so for archival and reference purposes, and is not intended to infringe the rights of the owners. Where unattributed content is displayed, owners are invited to send attribution notes to Alan 5B4AHJ or, if they are the exclusive holder of the rights to the content, to ask for the content to be withdrawn from Club Log's archive. All other parties referring to archival content in Club Log are reminded to retain attribution notes and to obtain permission to use the content where appropriate.