The International Telecommunication Union (ITU) allocates call sign prefixes for radio and television stations of all types.[1] They also form the basis for, but may not exactly match, aircraft registration identifiers. These prefixes are agreed upon internationally, and are a form of country code. A call sign can be any number of letters and numerals but each country must only use call signs that begin with the characters allocated for use in that country.

With regard to the second and/or third letters in the prefixes in the list below, if the country in question is allocated all callsigns with A to Z in that position, then that country can also use call signs with the digits 0 to 9 in that position. For example, the United States is assigned KAKZ, and therefore can also use prefixes like K1 or K9.

While ITU prefix rules are adhered to in the context of international broadcasting, including amateur radio, it is rarer for countries to assign broadcast call signs to conventional AM, FM, and television stations with purely domestic reach; the United States, Canada, Mexico, Japan, South Korea, and the Philippines are among those that do. Canada presents one notable exception to the ITU prefix rules: Since 1936, it has used CB for its own Canadian Broadcasting Corporation stations, whereas Chile is officially assigned the CB prefix. Innovation, Science and Economic Development Canada's broadcasting rules indicate this is through a "special arrangement", without elaborating.[2] In any case, the two countries are geographically separate enough to prevent confusion; Canada's shortwave broadcasters and amateur radio stations have always used one of its assigned ITU prefixes.

Unallocated and unavailable call sign prefixes

Unallocated: The following call sign prefixes are available for future allocation by the ITU. (x represents any letter; n represents any digit from 29.)

  • E8, E9, H5, J9, On, S4, T9*, Un, V9, Xn, YZ*, Z4Z7, Z9, 4N*.

(* Indicates a prefix that has recently been returned to the ITU.)[Note 1]

Unavailable: Under present ITU guidelines the following call sign prefixes shall not be allocated.[3] They are sometimes used unofficially – such as amateur radio operators operating in a disputed territory or in a nation state that has no official prefix (e.g. S0 in Western Sahara, station 1A0 at Knights of Malta headquarters in Rome, or station 1L in Liberland). (x represents any letter; n represents any digit from 29.)

  • nn, x0, x1, 0x, 1x, Qx.
  • no prefixes beginning with Q are used—they may be confused with Q codes. Note that this applies to prefixes only - suffixes are the responsibility of the allocating country.
  • no prefixes with the digits 1 or 0 are used—they may be confused with the letters I or O.
  • two digit prefixes (nn) are not as yet considered by the ITU.

Allocation table

View as grid chart
First character A First character C
AA-AI:
US
CA-CE:
CL
CF-CI:
CA
AJ-AL:
US
AM-AO:
ES
AP-AR:
PK
CJ-CK:
CA
CL-CM:
CU
CN:
MA
CO:
CU
CP:
BO
CQ-CR:
PT
AS:
PK
AT-AW:
IN
AX:
AU
AY-AZ:
AR
A0:
N/A
CS-CU:
PT
CV-CX:
UY
CY-CZ:
CA
C0:
N/A
A1:
N/A
A2:
BW
A3:
TO
A4:
OM
A5:
BT
A6:
AE
A7:
QA
A8:
LR
A9:
BH
C1:
N/A
C2:
NR
C3:
AD
C4:
CY
C5:
GM
C6:
BS
C7:
XM
C8-C9:
MZ
First character D First character E
DA-DI:
DE
EA-EH:
ES
EI:
IE
DJ-DR:
DE
EJ:
IE
EK:
AM
EL:
LR
EM-EO:
UA
EP-EQ:
IR
ER:
MD
DS-DT:
KR
DU-DZ:
PH
D0:
N/A
ES:
EE
ET:
ET
EU-EW:
BY
EX:
KG
EY:
TJ
EZ:
TM
E0:
N/A
D1:
N/A
D2-D3:
AO
D4:
CV
D5:
LR
D6:
KM
D7-D9:
KR
E1:
N/A
E2:
TH
E3:
ER
E4:
PS
E5:
CK
E6:
N/A
E7:
BA
E8-E9:
N/A
First character H First character J
HA:
HU
HB:
CH(LI)
HC-HD:
EC
HE:
CH
HF:
PL
HG:
HU
HH:
HT
HI:
DO
JA-JI:
JP
HJ-HK:
CO
HL:
KR
HM:
KP
HN:
IQ
HO-HP:
PA
HQ-HR:
HN
JJ-JR:
JP
HS:
TH
HT:
NI
HU:
SV
HV:
VA
HW-HY:
FR
HZ:
SA
H0:
N/A
JS:
JP
JT-JV:
MG
JW-JX:
NO
JY:
JO
JZ:
ID
J0:
N/A
H1:
N/A
H2:
CY
H3:
PA
H4:
SB
H5:
N/A
H6-H7:
NI
H8-H9:
PA
J1:
N/A
J2:
DJ
J3:
GD
J4:
GR
J5:
GW
J6:
LC
J7:
DM
J8:
VC
J9:
N/A
First character L First character O
LA-LI:
NO
OA-OC:
PE
OD:
LB
OE:
AT
OF-OI:
FI
LJ-LN:
NO
LO-LR:
AR
OJ:
FI
OK-OL:
CZ
OM:
SK
ON-OR:
BE
LS-LW:
AR
LX:
LU
LY:
LT
LZ:
BG
L0:
N/A
OS-OT:
BE
OU-OZ:
DK
O0:
N/A
L1:
N/A
L2-L9:
AR
O1-O9:
N/A
First character P First character S
PA-PI:
NL
SA-SI:
SE
PJ:
AN
PK-PO:
ID
PP-PR:
BR
SJ-SM:
SE
SN-SR:
PL
PS-PY:
BR
PZ:
SR
P0:
N/A
SS:
EG/SD
ST:
SD
SU:
EG
SV-SZ:
GR
S0:
N/A
P1:
N/A
P2:
PG
P3:
CY
P4:
AW
P5-P9:
KP
S1:
N/A
S2-S3:
BD
S4:
N/A
S5:
SI
S6:
SG
S7:
SC
S8:
ZA
S9:
ST
First character T First character U
TA-TC:
TR
TD:
GT
TE:
CR
TF:
IS
TG:
GT
TH:
FR
TI:
CR
UA-UI:
RU
TJ:
CM
TK:
FR
TL:
CF
TM:
FR
TN:
CG
TO-TQ:
FR
TR:
GA
UJ-UM:
UZ
UN-UQ:
KZ
UR:
UA
TS:
TN
TT:
TD
TU:
CI
TV-TX:
FR
TY:
BJ
TZ:
ML
T0:
N/A
US-UZ:
UA
U0:
N/A
T1:
N/A
T2:
TV
T3:
KI
T4:
CU
T5:
SO
T6:
AF
T7:
SM
T8:
PW
T9:
N/A
U1-U9:
N/A
First character V First character X
VA-VG:
CA
VH-VI:
AU
XA-XI:
MX
VJ-VN:
AU
VO:
CA
VP-VQ:
GB
VR:
HK
XJ-XO:
CA
XP:
DK
XQ-XR:
CL
VS:
GB
VT-VW:
IN
VX-VY:
CA
VZ:
AU
V0:
N/A
XS:
CN/TW
XT:
BF
XU:
KH
XV:
VN
XW:
LA
XX:
MO
XY-XZ:
MM
X0:
N/A
V1:
N/A
V2:
AG
V3:
BZ
V4:
KN
V5:
NA
V6:
FM
V7:
MH
V8:
BN
V9:
N/A
X1-X9:
N/A
First character Y First character Z
YA:
AF
YB-YH:
ID
YI:
IQ
ZA:
AL
ZB-ZI:
GB
YJ:
VU
YK:
SY
YL:
LV
YM:
TR
YN:
NI
YO-YR:
RO
ZJ:
GB
ZK-ZM:
NZ
ZN-ZO:
GB
ZP:
PY
ZQ:
GB
ZR:
ZA
YS:
SV
YT-YU:
RS
YV-YY:
VE
YZ-Y0:
N/A
ZS-ZU:
ZA
ZV-ZZ:
BR
Z0:
N/A
Y1:
N/A
Y2-Y9:
DE
Z1:
N/A
Z2:
ZW
Z3:
MK
Z4-Z7:
N/A
Z8:
SS
Z9:
N/A
First character 3 First character 4
3A:
MC
3B:
MU
3C:
GQ
3D:
SZ/FJ
3E-3F:
PA
3G:
CL
3H-3I:
CN/TW
4A-4C:
MX
4D-4I:
PH
3J-3R:
CN/TW
4J-4K:
AZ
4L:
GE
4M:
VE
4N:
N/A
4O:
ME
4P-4R:
LK
3S-3U:
CN/TW
3V:
TN
3W:
VN
3X:
GN
3Y:
NO
3Z:
PL
30:
N/A
4S:
LK
4T:
PE
4U:
XU
4V:
HT
4W:
TL
4X:
IL
4Y:
XA
4Z:
IL
40:
N/A
31-39:
N/A
41-49:
N/A
First character 5 First character 6
5A:
LY
5B:
CY
5C-5G:
MA
5H-5I:
TZ
6A-6B:
EG
6C:
SY
6D-6I:
MX
5J-5K:
CO
5L-5M:
LR
5N-5O:
NG
5P-5Q:
DK
5R:
MG
6J:
MX
6K-6N:
KR
6O:
SO
6P-6R:
PK
5S:
MG
5T:
MR
5U:
NE
5V:
TG
5W:
WS
5X:
UG
5Y-5Z:
KE
50:
N/A
6S:
PK
6T-6U:
SD
6V-6W:
SN
6X:
MG
6Y:
JM
6Z:
LR
60:
N/A
51-59:
N/A
61-69:
N/A
First character 7 First character 8
7A-7I:
ID
8A-8I:
ID
7J-7N:
JP
7O:
YE
7P:
LS
7Q:
MW
7R:
DZ
8J-8N:
JP
8O:
BW
8P:
BB
8Q:
MV
8R:
GY
7S:
SE
7T-7Y:
DZ
7Z:
SA
70:
N/A
8S:
SE
8T-8Y:
IN
8Z:
SA
80:
N/A
71-79:
N/A
81-89:
N/A
First character 9 Full first-character allocations
9A:
HR
9B-9D:
IR
9E-9F:
ET
9G:
GH
9H:
MT
9I:
ZM

B: CN (TW)
F: FR
G: GB
I: IT

K: US
M: GB
N: US
Q: XQ

R: RU
W: US
2: GB
 

9J:
ZM
9K:
KW
9L:
SL
9M:
MY
9N:
NP
9O-9R:
CD
9S-9T:
CD
9U:
BI
9V:
SG
9W:
MY
9X:
RW
9Y-9Z:
TT
90:
N/A
91-99:
N/A

Linked country codes are from ISO 3166-1.

       Series allocated to an international organization.
       Provisional allocation in accordance with No. S19.33: "Between radiocommunication conferences, the Secretary-General is authorized to deal with questions relating to changes in the allocation of series of call signs, on a provisional basis, and subject to confirmation by the following conference."
       Half series allocation. The first country listed uses all callsigns beginning with the listed prefix followed by A-M, and the second country listed uses N-Z.

View this list arranged by nation
Nation Call signs allocated
Afghanistan T6, YA
Albania ZA
Algeria 7R, 7T-7Y
Andorra C3
Angola D2-D3
Antigua and Barbuda V2
Argentina AY-AZ, L2-L9, LO-LW
Armenia EK
Aruba P4
Australia AX, VH-VN, VZ
Austria OE
Azerbaijan 4J-4K
Bahamas C6
Bahrain A9
Bangladesh S2-S3
Barbados 8P
Belarus EU-EW
Belgium ON-OT
Belize V3
Benin TY
Bhutan A5
Bolivia CP
Bosnia and Herzegovina E7 (Was T9 prior to 7 Aug 2007)
Botswana A2, 8O
Brazil PP-PY, ZV-ZZ
Brunei V8
Bulgaria LZ
Burkina Faso XT
Burundi 9U
Cambodia XU
Cameroon TJ
Canada CF-CK, CY-CZ, VA-VG, VX-VY, XJ-XO
VO (Newfoundland)
Cape Verde D4
Central African Republic TL
Chad TT
Chile CA-CE, XQ-XR, 3G
China (People's Republic of)
(see also Taiwan)
B, XS, 3H-3U
VR (Hong Kong), XX (Macao)
Colombia HJ-HK, 5J-5K
Comoros D6
Congo (Democratic Republic of) 9O-9T
Congo (Republic of) TN
Cook Islands E5
Costa Rica TE, TI
Croatia 9A
Cuba CL-CM, CO, T4
Cyprus C4, H2, P3, 5B
Czech Republic OK-OL
Denmark OU-OZ, XP, 5P-5Q
Djibouti J2
Dominica J7
Dominican Republic HI
Ecuador HC-HD
Egypt SSA-SSM, SU, 6A-6B
El Salvador HU, YS
Equatorial Guinea 3C
Eritrea E3
Estonia ES
Eswatini (Swaziland) 3DA-3DM
Ethiopia ET, 9E-9F
Fiji 3DN-3DZ
Finland OF-OJ
France (and its Overseas departments/territories) F, HW-HY, TH, TK, TM, TO-TQ, TV-TX
Gabon TR
Gambia C5
Georgia 4L
Germany DA-DR, Y2-Y9
Ghana 9G
Greece J4, SV-SZ
Grenada J3
Guatemala TD, TG
Guinea 3X
Guinea-Bissau J5
Guyana 8R
Haiti HH, 4V
Honduras HQ-HR
Hungary HA, HG
Iceland TF
India AT-AW, VT-VW, 8T-8Y
Indonesia JZ, PK-PO, YB-YH, 7A-7I, 8A-8I
Iran EP-EQ, 9B-9D
Iraq HN, YI
Ireland EI-EJ
Israel 4X, 4Z
Italy I
Ivory Coast TU
Jamaica 6Y
Japan JA-JS, 7J-7N, 8J-8N
Jordan JY
Kazakhstan UN-UQ
Kenya 5Y-5Z
Kiribati T3
North Korea HM, P5-P9
South Korea DS-DT, D7-D9, HL, 6K-6N
Kuwait 9K
Kyrgyzstan EX
Laos XW
Latvia YL
Lebanon OD
Lesotho 7P
Liberia A8, D5, EL, 5L-5M, 6Z
Libya 5A
Liechtenstein
(uses prefixes allocated to Switzerland)
HB (HB0, HB3Y, HBL)
Lithuania LY
Luxembourg LX
Madagascar 5R-5S, 6X
Malawi 7Q
Malaysia 9M, 9W
Maldives 8Q
Mali TZ
Malta 9H
Marshall Islands V7
Mauritania 5T
Mauritius 3B
Mexico XA-XI, 4A-4C, 6D-6J
Micronesia V6
Moldova ER
Monaco 3A
Mongolia JT-JV
Montenegro 4O
Morocco CN, 5C-5G
Mozambique C8-C9
Myanmar XY-XZ
Namibia V5
Nauru C2
Nepal 9N
Netherlands PA-PI
PJ (Netherlands Antilles)
New Zealand ZK-ZM
Nicaragua HT, H6-H7, YN
Niger 5U
Nigeria 5N-5O
North Macedonia Z3
Norway JW-JX, LA-LN, 3Y
Oman A4
Pakistan AP-AS, 6P-6S
Palau T8
Palestinian Authority E4
Panama HO-HP, H3, H8-H9, 3E-3F
Papua New Guinea P2
Paraguay ZP
Peru OA-OC, 4T
Philippines DU-DZ, 4D-4I
Poland HF, SN-SR, 3Z
Portugal CQ-CU
Qatar A7
Romania YO-YR
Russia R, UA-UI
Rwanda 9X
Saint Kitts and Nevis V4
Saint Lucia J6
Saint Vincent and the Grenadines J8
Samoa (Western Samoa) 5W
San Marino T7
São Tomé and Príncipe S9
Saudi Arabia HZ, 7Z, 8Z
Senegal 6V-6W
Serbia YT-YU
Seychelles S7
Sierra Leone 9L
Singapore 9V, S6
Slovakia OM
Slovenia S5
Solomon Islands H4
Somalia 6O, T5
South Africa S8, ZR-ZU
Spain AM-AO, EA-EH
Sri Lanka 4P-4S
Sudan SSN-STZ, 6T-6U
Suriname PZ
Sweden SA-SM, 7S, 8S
Switzerland (see also Liechtenstein) HB, HE
Syria YK, 6C
Tajikistan EY
Taiwan
(uses prefixes allocated to China)
B (BM, BN, BO, BQ, BV, BX)
Tanzania 5H-5I
Thailand E2, HS
Timor–Leste (East Timor) 4W
Togo 5V
Tonga A3
Trinidad and Tobago 9Y-9Z
Tunisia TS, 3V
Turkey TA-TC, YM
Turkmenistan EZ
Tuvalu T2
Uganda 5X
Ukraine EM-EO, UR-UZ
United Arab Emirates A6
United Kingdom
(and Overseas Territories/Crown Dependencies)
2, G, M, VP-VQ, VS, ZB-ZJ, ZN-ZO, ZQ
United States of America AA-AL, K, N, W
Uruguay CV-CX
Uzbekistan UJ-UM
Vanuatu YJ
Vatican City HV
Venezuela YV-YY, 4M
Vietnam XV, 3W
Yemen 7O
Zambia 9I-9J
Zimbabwe Z2
Organization Call signs allocated
International Civil Aviation Organization 4Y
United Nations 4U
World Meteorological Organization C7
Call Sign Series Allocated to
AAAL United States
AMAO Spain
APAS Pakistan
ATAW India
AX Australia
AYAZ Argentina
A2 Botswana
A3 Tonga
A4 Oman
A5 Bhutan
A6 United Arab Emirates
A7 Qatar
A8 Liberia
A9 Bahrain
B China
B (BM-BQ, BU-BX) Taiwan
CACE Chile
CFCK Canada
CLCM Cuba
CN Morocco
CO Cuba
CP Bolivia
CQCU Portugal
CVCX Uruguay
CYCZ Canada
C2 Nauru
C3 Andorra
C4 Cyprus
C5 The Gambia
C6 The Bahamas
C7 World Meteorological Organization[Note 2]
C8C9 Mozambique
DADR Germany
DSDT South Korea
DUDZ Philippines
D2D3 Angola
D4 Cape Verde
D5 Liberia
D6 Comoros
D7D9 South Korea
EAEH Spain
EIEJ Ireland
EK Armenia
EL Liberia
EMEO Ukraine
EPEQ Iran
ER Moldova
ES Estonia
ET Ethiopia
EUEW Belarus
EX Kyrgyzstan
EY Tajikistan
EZ Turkmenistan
E2 Thailand
E3 Eritrea
E4 Palestinian Authority
E5 Cook Islands
E6 Niue[Note 3]
E7 Bosnia and Herzegovina
F France (and its Overseas departments/territories)
G United Kingdom (and its overseas territories/Crown dependencies)
HA Hungary
HB Switzerland
HB (HB0, HB3Y, HBL) Liechtenstein (uses prefixes allocated to Switzerland)
HCHD Ecuador
HE Switzerland
HF Poland
HG Hungary
HH Haiti
HI Dominican Republic
HJHK Colombia
HL South Korea
HM North Korea
HN Iraq
HOHP Panama
HQHR Honduras
HS Thailand
HT Nicaragua
HU El Salvador
HV Vatican City
HWHY France (and its Overseas departments/territories)
HZ Saudi Arabia
H2 Cyprus
H3 Panama
H4 Solomon Islands
H6H7 Nicaragua
H8H9 Panama
I Italy
JAJS Japan
JTJV Mongolia
JWJX Norway
JY Jordan
JZ Indonesia
J2 Djibouti
J3 Grenada
J4 Greece
J5 Guinea-Bissau
J6 Saint Lucia
J7 Dominica
J8 Saint Vincent and the Grenadines
K United States
LALN Norway
LOLW Argentina
LX Luxembourg
LY Lithuania
LZ Bulgaria
L2L9 Argentina
M United Kingdom (and its overseas territories/Crown dependencies)
N United States
OAOC Peru
OD Lebanon
OE Austria
OFOJ Finland
OKOL Czech Republic
OM Slovakia
ONOT Belgium
OUOZ Denmark
PAPI Netherlands
PJ NetherlandsFormer Netherlands Antilles
PKPO Indonesia
PPPY Brazil
PZ Suriname
P2 Papua New Guinea
P3 Cyprus
P4 Aruba
P5P9 North Korea
R Russia
SASM Sweden
SNSR Poland
SSASSM Egypt[Note 4]
SSNSTZ Sudan[Note 4]
SU Egypt
SVSZ Greece
S2S3 Bangladesh
S5 Slovenia
S6 Singapore
S7 Seychelles
S8 South Africa
S9 São Tomé and Príncipe
TATBTC Turkey
TD Guatemala
TE Costa Rica
TF Iceland
TG Guatemala
TH France (and its Overseas departments/territories)
TI Costa Rica
TJ Cameroon
TK France (and its Overseas departments/territories)
TL Central African Republic
TM France (and its Overseas departments/territories)
TN Republic of the Congo
TOTQ France (and its Overseas departments/territories)
TR Gabon
TS Tunisia
TT Chad
TU Ivory Coast
TVTX France (and its Overseas departments/territories)
TY Benin
TZ Mali
T2 Tuvalu
T3 Kiribati
T4 Cuba
T5 Somalia
T6 Afghanistan
T7 San Marino
T8 Palau
UAUI Russia
UJUM Uzbekistan
UNUQ Kazakhstan
URUZ Ukraine
VAVG Canada
VHVN Australia
VO Canada (formerly Dominion of Newfoundland)
VPVQ United Kingdom (and its overseas territories/Crown dependencies)
VR Hong Kong (Special administrative regions of China)
VS United Kingdom
VTVW India
VXVY Canada
VZ Australia
V2 Antigua and Barbuda
V3 Belize
V4 Saint Kitts and Nevis
V5 Namibia
V6 Federated States of Micronesia
V7 Marshall Islands
V8 Brunei
W United States
XAXI Mexico
XJXO Canada
XP Denmark
XQXR Chile
XS China
XT Burkina Faso
XU Cambodia
XV Vietnam
XW Laos
XX Macao (Special administrative regions of China)
XYXZ Burma
YA Afghanistan
YBYH Indonesia
YI Iraq
YJ Vanuatu
YK Syria
YL Latvia
YM Turkey
YN Nicaragua
YOYR Romania
YS El Salvador
YTYU Serbia
YVYY Venezuela
Y2Y9 Germany
ZA Albania
ZBZJ United Kingdom (and its overseas territories/Crown dependencies)
ZKZM New Zealand
ZNZO United Kingdom (and its overseas territories/Crown dependencies)
ZP Paraguay
ZQ United Kingdom (and its overseas territories/Crown dependencies)
ZRZU South Africa
ZVZZ Brazil
Z2 Zimbabwe
Z3 North Macedonia
Z8 South Sudan[Note 3]
2 United Kingdom (and its overseas territories/Crown dependencies)
3A Monaco
3B Mauritius
3C Equatorial Guinea
3DA3DM Eswatini[Note 4]
3DN3DZ Fiji[Note 4]
3E3F Panama
3G Chile
3H3U China
3V Tunisia
3W Vietnam
3X Guinea
3Y Norway
3Z Poland
4A4C Mexico
4D4I Philippines
4J4K Azerbaijan
4L Georgia
4M Venezuela
4O Montenegro
4P4S Sri Lanka
4T Peru
4U United Nations[Note 2]
4V Haiti
4W Timor-Leste
4X Israel
4Y International Civil Aviation Organization[Note 2]
4Z Israel
5A Libya
5B Cyprus
5C5G Morocco
5H5I Tanzania
5J5K Colombia
5L5M Liberia
5N5O Nigeria
5P5Q Denmark
5R5S Madagascar
5T Mauritania
5U Niger
5V Togo
5W Western Samoa
5X Uganda
5Y5Z Kenya
6A6B Egypt
6C Syria
6D6J Mexico
6K6N South Korea
6O Somalia
6P6S Pakistan
6T6U Sudan
6V6W Senegal
6X Madagascar
6Y Jamaica
6Z Liberia
7A7I Indonesia
7J7N Japan
7O Yemen
7P Lesotho
7Q Malawi
7R Algeria
7S Sweden
7T7Y Algeria
7Z Saudi Arabia
8A8I Indonesia
8J8N Japan
8O Botswana
8P Barbados
8Q Maldives
8R Guyana
8S Sweden
8T8Y India
8Z Saudi Arabia
9A Croatia
9B9D Iran
9E9F Ethiopia
9G Ghana
9H Malta
9I9J Zambia
9K Kuwait
9L Sierra Leone
9M Malaysia
9N Nepal
9O9T Democratic Republic of the Congo
9U Burundi
9V Singapore
9W Malaysia
9X Rwanda
9Y9Z Trinidad and Tobago

See also

Notes

  1. T9 is the former prefix of Bosnia and Herzegovina; it moved to E7 on 7 August 2007. YZ and 4N belonged to Yugoslavia, along with 4O (which went to successor state Montenegro) and YT and YU (which went to successor state Serbia).The ARRL Letter (17 May 2007). "ITU Okays Montenegro, Serbia Call Sign Prefix Agreement". eHam.net. Retrieved 5 May 2023.
  2. 1 2 3 Series allocated to an international organization.
  3. 1 2 Provisional allocation in accordance with No. S19.33: (Between radiocommunication conferences, the Secretary-General is authorized to deal with questions relating to changes in the allocation of series of call signs, on a provisional basis, and subject to confirmation by the following conference.)"Recent Changes". ITU. Retrieved 5 May 2023.
  4. 1 2 3 4 Half-series allocation.

References

  1. GLAD (7 December 2020). "Table of International Call Sign Series (Appendix 42 to the RR)". International Telecommunication Union. Retrieved 7 December 2020.
  2. "Broadcasting Procedures and Rules". Innovation, Science and Economic Development Canada. 19 January 2021.
  3. "RES13-1 RESOLUTION 13 (Rev.WRC-97) Formation of call signs and allocation of new international series" (PDF). Volume 3 - Resolutions and Recommendations – Edition of 2008. International Telecommunication Union. Archived from the original (PDF) on 8 October 2022. Retrieved 4 May 2023.
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