Any call sign having the following letters as the suffix is not assignable.
OSO Emargency Signal QRA-QTZ Q Codes (cf. US blocks QRA-QUZ.) SOS Distress Signal TTT Safety Signal (Important navigational or meteorological warning message) XXX Urgency Signal (Very urgent message) cf. YAA-ZZZ Club Stations (and Repeaters)
But at an early stage — and even recent days as a mistake for 7L4TTT (now he is 7L4WWW) — some authority's branches issued some OSO, TTT and XXX suffixes. Only JA9TTT is still alive.
Variation of the Q-Code Related Withheld Range
Suffixes YAA-ZZZ are reserved for club stations. Therefore, any club station in Japan should have a six-character call sign.
(This may be a disadvantage in contests.
The Japanese authority does not provide shorter call signs for this purpose.)
JR6YAA-ZZZ for club stations in Okinawa,
JD1YAA-ZZZ for those in Ogasawara and
7J#YAA-YMZ for foreigners' first licensed 1993-1999 (7J6YNA-YQZ for Okinawa).
A complete listing of club stations is HERE: ja-club20110326.xls for those interested (in Japanese, 1MB, as of Mar. 26, 2011).
JP#YAA-ZZZ and JQ6YAA-ZZZ in Okinawa are allocated to repeaters and their controllers.
|Remote Controller for Repeater|
8J / 8N special event stations and ARISS School Contact stations may happen to choose their suffix from YAA-ZZZ.
Surprisingly enough, the authority permitted epoch-making "two-by-one" call signs for the stations commemorating FIFA World Cup in 2002.
|8J1C||Ibaraki||FIFA World Cup||2002|
On June 24, 2004, single letter suffix 8J#$ and 8N#$ became to be officially assignable under the new criteria. The first example is 8N6A on July 6, 2004. A complete listing of single letter suffixes is HERE.
Two characters suffixes were assigned only for JA# (very old timers) and JR6 (fairly old timers in Okinawa) prefixes. No JH#AA, JE#AA, .... , JS#AA stations. However, there are some exceptions for JR# repeater stations and 7J / 8J special event or Antarctica stations. The suffix RL means a JARL station.
|JA#AA-RK,RM-ZZ||Individuals except Okinawa|
|JA1RL||JARL central station|
|JA[2-0]RL||JARL district stations|
|JR#WA-WZ,VA-VZ||Repeaters except Okinawa|
|JR6AA-ME||Individuals in Okinawa (ex KR8AA-ME)|
|JR6RL||JARL Okinawa district station|
|JR6YA-YY||Repeaters in Okinawa|
|8J1NP||North Pole Expedition||1978|
|8J1RF,RL-RM||JARL Antarctic stations||RM closed|
|8J1WJ||Boy Scouts World Jamboree||1971|
|8N3RI||Rotary International 2004 Osaka Convention||2004|
On June 24, 2004, two character suffixes 8J#*$ and 8N#*$ became to be officially assignable under the new criteria. The first example is 8N#HQ on July 3, 2004. A complete listing of two-character suffix special event stations is HERE.
Experimental StationsWe amateurs are not alone. In Japan, experimental stations also use the same two-by-two format call signs (J$#$$), and two-by-ones (J$#$).
Call Sign Format including the Call Area Number Format Example Category two-by-one JS2H Experimental Station two-by-two JS3AK
two-by-three JA1AAA Amateur Station cf. JA9553
An example above, JS2H was an experimental VHF FM broadcast station in 1960 — aka JS2AO 1958-1960 — and in its later years, it became FM Tokyo, JOAU-FM.
Some of the good examples for us are as follows:
- 1.8MHz Band Acquisition Trial (1963)
- JS2A in Shimizu Port in Shizuoka, to prove that there is no bad influence of amateurs to LORAN (LOng-RAnge Navigation)
- Dummy Satellite Communication System (1976)
- JS3AK: Dummy transponder at the top of Mt. Fuji
- JS3AL: Controller in Asagiri-kogen Park
- JS3AM at the JARL Tokai Office in Nagoya
- JS2FK at the JARL HQ in Tokyo
- QRO Field Test (1996)
- JS2HM for a field test toward our 1kW output ticket, which is QROed from the previous 500W limitation
- cf. D-STAR Experimental (2001-2003?), used not Call Sign but Call Name
- JARL Jikken 1: a relay station, 1200MHz and 10GHz
- JARL Jikken 2: a relay station, 1200MHz and 10GHz
- JARL Jikken 10-19: terminal stations, 1200MHz (Digital Voice ... 5, Data .... 5)
- JARL Jikken 20-29: terminal stations, 1200MHz
- JARL Jikken 30-31: terminal stations, 1200MHz AMBE
In addition, JG2AS has been a WWVB-equivalent long wave standard frequency station in Japan (now changed to JJY).
Please reminded that these stations were not defined as "amateur stations" but "experimental stations." There are some differences on the area numbers between experimental stations and amateurs, because ITU prohibits 0 and 1 for an experimental station.
Numeral for Each Branch Category Kanto Shin'etsu Tokai Hokuriku Kinki Chugoku Shikoku Kyushu Tohoku Hokkaido Okinawa Experimental Station 2 2 3 3 4 5 6 7 8 9 7 Amateur Station 1 0 2 9 3 4 5 6 7 8 6
A four-character suffix call sign is assigned only for a special event station as 8J#***$ or 8N#***$ since June 24, 2004. The first example is 8J4ARDF on July 17, 2004. A complete listing of four-character suffixes is HERE.
A five-character suffix call sign is assigned only for a special event station as 8J#****$ or 8N#****$ since June 24, 2004 according to the result of WRC-03. The first example is 8N3ARISS on July 7, 2004. A complete listing of five-character suffixes is HERE. Though ITU doesn't limit the length of a special call sign, Japan limits a suffix up to five characters.
|Nationality Identification||Ordinary Case||Special Occasion|
|ITU RR||Japan||ITU RR||Japan|
|Suffix Length||Upto 4 Characters,|
While Upto 3 Characters for "Half Series" Countries
|2 or 3 Characters||No Limitation||Upto 5 Characters|
(i.e. B, F, G, I, K, M, N, R, W)
|—||$#* ... *$||—|
|**#* ... *$||8[J,N]#$,
(Suffix: Upto 3 Characters)
|—||***#* ... *$||—|