Call signs in Russia

Call signs in Russia are unique identifiers for telecommunications and broadcasting. Call signs are regulated internationally by the ITU as well as nationally by Ministry of Communications and Mass Media of the Russian Federation. The latter is responsible for providing policy on the allocation of Russia's radio spectrum to support efficient, reliable and responsive wireless telecommunications and broadcasting infrastructure.
In 1991 Russia inherited the largest portion of the former Soviet Union's allocated call signs. The other post-USSR countries which inherited parts of the ITU UAA–UZZ call sign block are Uzbekistan, Kazakhstan, and Ukraine.

Call sign blocks for telecommunication

The International Telecommunication Union has assigned Russia the following call sign blocks for all radio communication, broadcasting or transmission:

Call sign block
RAA–RZZ	Russia
UAA–UIZ	Russia

While not directly related to call signs, the International Telecommunication Union further has divided all countries assigned amateur radio prefixes into three regions; Russia is located in ITU Region 1.

Call sign assignments for amateur radio

Amateur radio or ham radio call signs are unique identifiers for the 24,000 licensed operators.
Russia uses the following 1-letter and 2-letter prefixes in amateur radio call signs for normal operation: R, RA, RK, RN, RU, RV, RW, RX, RZ, and UA. Any of these prefixes can be used in any of Russia's federal subjects. The other prefixes are reserved for special operation.
It uses the numerals 1, 2, 3, 4, 5, 6, 7, 8, 9, and 0 to separate prefixes from suffixes, and to indicate in which of the six regions the amateur was assigned the call sign.
Russia uses the first letter of the suffix to designate a specific federal subject in each respective region. This means that for most call signs the numeral and first letter of the suffix identifies which federal subject the operator was licensed in.

East Siberia and Pacific Coast

Combinations not listed are used by radio amateurs in the federal subject next to the listed combination immediately preceding it in the sort order; e.g., the 1B combination is used by radio amateurs in Saint Petersburg. Since 2010, call signs in the '3' region can also be issued with the numerals 2 and 5; in the '6' region with numeral 7; and in the '9' region with numeral 8.

Special call signs

The second letter in a suffix: W, X, Y, Z – Club stations
U1–4, 6, 9–0 World War II veterans
U1MIR–U9MIR cosmonauts
RI1ANA–RI1ANZ, RA00ANT–RI99ANT Antarctica, South Shetland Islands
RI1FJA–RI1FJZ Franz Josef Land
R1MVA–R1MVZ Maly Vysotsky Island
RA2, UA2–UI2 Kaliningrad Oblast
R3ARES – Russian amateur radio emergency service H.Q, Moscow.
RE0RAS – RARES, Regional service. Central Siberia, Krasnoyarsk.
R3ARC – H.Q. Rescue service of Russian Red Cross. Moscow.
R3RRC – "Russian Robinson Club" H.Q. Lipetsk city.
R3SRR – Russian Amateur Radio Union H.Q. Moscow.
R3VHF – VHF Committee of Russian Amateur Radio Union.
RS0ISS – Cosmonauts on the International Space Station.

History of call sign allocation

Russia was not a signatory to the 1913 Berlin agreement but received the R block series. Amateur radio was not yet developed enough to be subject to this identification scheme.
In 1927 the International Telecommunication Union Conference in Washington established internally agreed upon call sign prefixes – Russia was now in the USSR and the latter was assigned the RAA–RZZ block.
At the 1947 Atlantic City ITU Conference, the USSR was assigned the following call sign blocks:

Call sign block	1947 Assignment	Present assignment
DRA–DTZ	Bielorussian Soviet Socialist Republic	Germany, South Korea
EKA–EKZ	Union of Soviet Socialist Republics	Armenia
EMA–EOZ	Union of Soviet Socialist Republics	Ukraine
ERA–ERZ	Union of Soviet Socialist Republics	Moldova
ESA–ESZ	Estonia	Estonia
EUA–EZZ	Union of Soviet Socialist Republics	Belarus, Turkmenistan
LYA–LYZ	Lithuania	Lithuania
RAA–RZZ	Union of Soviet Socialist Republics	Russia
UAA–UQZ	Union of Soviet Socialist Republics	Russia, Uzbekistan, Kazakhstan
URA–UTZ	Ukrainian Soviet Socialist Republic	Ukraine
UUA–UZZ	Union of Soviet Socialist Republics	Ukraine
YLA–YLZ	Latvia	Latvia
4JA–4LZ	Union of Soviet Socialist Republics	Azerbaijan, Georgia

As of 2010, several call sign codes were deleted or merged following the merger of the corresponding entity with a neighbouring subject of the Russian Federation between 2005 and 2008:

9G merged with 9F to become Perm Krai which uses both 9F and 9G
8T merged with 0S, 0T Irkutsk Oblast
8V merged with 0U, 0V to become Zabaykalsky Krai
0B and 0H merged with 0A
0X merged with 0Z to become 0X, 0Z

Japan/USSR Disputed areas – WWII

Sakhalin Island has been disputed between Russia/USSR and Japan since the mid-19th century. From 1905 until after World War II, South Sakhalin Island was under Japanese control and was assigned the JP7 call sign prefix for radio purposes. From 1945 until the present the call sign prefix for all of Sahalin Island is UA0, with F as the first letter of the suffix. The Japan-Soviet Joint Declaration of 1956 laid down that Habomai Is. and Shikotan I. should be returnable to Japan, but Russia is still the administrative authority in the Four Northern Islands.

Germany/USSR Disputed areas – WWII

While not strictly a Russian call sign issue, following World War II, Byelorussia inherited the DR–DT block at the Atlantic City Conference from the German D-block. The block was then transferred back to Germany, and the DS–DT block subsequently given to South Korea.