ITU Radio Callsign Prefixes

Given an ITU prefix, name the country/organization it belongs to.

In almost all cases, the ITU assigns prefixes to sovereign countries, and lets the country decide how to distribute prefixes to subnational units.

Therefore, name the sovereign country that the prefix is assigned to.

PJ is the major exception, and therefore has multiple correct answers.

Source: https://www.itu.int/en/ITU-R/terrestrial/fmd/Pages/call_sign_series.aspx

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Last updated: November 11, 2024

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First submitted	November 11, 2024
Times taken	3
Average score	17.7%
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Prefix	Answer
2	United Kingdom
3A	Monaco
3B	Mauritius
3C	Equatorial Guinea
3DA – 3DM	Eswatini
3DN – 3DZ	Fiji
3E – 3F	Panama
3G	Chile
3H – 3U	China
3V	Tunisia
3W	Vietnam
3X	Guinea
3Y	Norway
3Z	Poland
4A – 4C	Mexico
4D – 4I	Philippines
4J – 4K	Azerbaijan
4L	Georgia
4M	Venezuela
4O	Montenegro
4P – 4S	Sri Lanka
4T	Peru
4U	United Nations
4V	Haiti
4W	East Timor
4X	Israel
4Y	International Civil Aviation Organization
4Z	Israel
5A	Libya
5B	Cyprus
5C – 5G	Morocco
5H – 5I	Tanzania
5J – 5K	Colombia
5L – 5M	Liberia
5N – 5O	Nigeria
5P – 5Q	Denmark
5R – 5S	Madagascar
5T	Mauritania
5U	Niger
5V	Togo
5W	Samoa
5X	Uganda
5Y – 5Z	Kenya
6A – 6B	Egypt
6C	Syria
6D – 6J	Mexico
6K – 6N	South Korea
6O	Somalia
6P – 6S	Pakistan
6T – 6U	Sudan
6V – 6W	Senegal
6X	Madagascar
6Y	Jamaica
6Z	Liberia
7A – 7I	Indonesia
7J – 7N	Japan
7O	Yemen
7P	Lesotho
7Q	Malawi
7R	Algeria
7S	Sweden
7T – 7Y	Algeria
7Z	Saudi Arabia
8A – 8I	Indonesia
8J – 8N	Japan
8O	Botswana
8P	Barbados
8Q	Maldives
8R	Guyana
8S	Sweden
8T – 8Y	India
8Z	Saudi Arabia
9A	Croatia
9B – 9D	Iran
9E – 9F	Ethiopia
9G	Ghana
9H	Malta
9I – 9J	Zambia
9K	Kuwait
9L	Sierra Leone
9M	Malaysia
9N	Nepal
9O – 9T	Democratic Republic of the Congo
9U	Burundi
9V	Singapore
9W	Malaysia
9Y – 9Z	Trinidad and Tobago
A2	Botswana
A3	Tonga
A4	Oman
A5	Bhutan
A6	United Arab Emirates
A7	Qatar
A8	Liberia
A9	Bahrain
AA – AL	United States of America
AM – AO	Spain
AP – AS	Pakistan
AT – AW	India
AX	Australia
AY – AZ	Argentina
BA – BL	China
BM – BQ	Taiwan
BR – BT	China
BU – BX	Taiwan
BY – BZ	China
C2	Nauru
C3	Andorra
C4	Cyprus
C5	Gambia
C6	Bahamas
C7	World Meteorological Organization
C8 – C9	Mozambique
CA – CE	Chile
CF – CK	Canada
CL – CM	Cuba
CN	Morocco
CO	Cuba
CP	Bolivia
CQ – CU	Portugal
CV – CX	Uruguay
CY – CZ	Canada
D2 – D3	Angola
D4	Cape Verde
D5	Liberia
D6	Comoros
D7 – D9	South Korea
DA – DR	Germany
DS –DT	South Korea
DU – DZ	Philippines
E2	Thailand
E3	Eritrea
E4	Palestine
E5	Cook Islands
E6	Niue
E7	Bosnia and Herzegovina
EA – EH	Spain
EI – EJ	Ireland
EK	Armenia
EL	Liberia
EM – EO	Ukraine
EP – EQ	Iran
ER	Moldova
ES	Estonia
ET	Ethiopia
EU – EW	Belarus
EX	Kyrgyzstan
EY	Tajikistan
EZ	Turkmenistan
F	France
G	United Kingdom
H2	Cyprus
H3	Panama
H4	Solomon Islands
H6 – H7	Nicaragua
H8 – H9	Panama
HA	Hungary
HB	Switzerland
HC – HD	Ecuador
HE	Switzerland
HF	Poland
HG	Hungary
HH	Haiti
HI	Dominican Republic
HJ – HK	Colombia
HL	South Korea
HM	North Korea
HN	Iraq
HO – HP	Panama
HQ – HR	Honduras
HS	Thailand
HU	El Salvador
HV	Vatican City
HW – HY	France
HZ	Saudi Arabia
I	Italy
J2	Djibouti
J3	Grenada
J4	Greece
J5	Guinea-Bissau
J6	Saint Lucia
J7	Dominica
J8	Saint Vincent and the Grenadines
JA – JS	Japan
JT – JV	Mongolia
JW – JX	Norway
JY	Jordan
JZ	Indonesia
K	United States of America
L2 – L9	Argentina
LA – LN	Norway
LO – LW	Argentina
LX	Luxembourg
LY	Lithuania
LZ	Bulgaria
M	United Kingdom
N	United States of America
OA – OC	Peru
OD	Lebanon
OE	Austria
OF – OJ	Finland
OK – OL	Czech Republic
OM	Slovakia
ON – OT	Belgium
OU – OZ	Denmark
P2	Papua New Guinea
P3	Cyprus
P4	Aruba
P5 – P9	North Korea
PA – PI	Netherlands
PJ	Curaçao, Bonaire, Sint Eustatius, Sint Maarten and Saba
PK – PO	Indonesia
PP – PY	Brazil
PZ	Suriname
R	Russia
S2 – S3	Bangladesh
S5	Slovenia
S6	Singapore
S7	Seychelles
S8	South Africa
S9	Sao Tome and Principe
SA – SM	Sweden
SN – SR	Poland
SSA – SSM	Egypt
SSN – ST	Sudan
SU	Egypt
SV – SZ	Greece
T2	Tuvalu
T3	Kiribati
T4	Cuba
T5	Somalia
T6	Afghanistan
T7	San Marino
T8	Palau
TA – TC	Turkey
TD	Guatemala
TE	Costa Rica
TF	Iceland
TG	Guatemala
TH	France
TI	Costa Rica
TJ	Cameroon
TK	France
TL	Central African Republic
TM	France
TN	Republic of the Congo
TO – TQ	France
TR	Gabon
TS	Tunisia
TT	Chad
TU	Ivory Coast
TV – TX	France
TY	Benin
TZ	Mali
UA – UI	Russia
UJ – UM	Uzbekistan
UN – UQ	Kazakhstan
UR – UZ	Ukraine
V2	Antigua and Barbuda
V3	Belize
V4	Saint Kitts and Nevis
V5	Namibia
V6	Micronesia
V7	Marshall Islands
V8	Brunei
VA – VG	Canada
VH – VN	Australia
VO	Canada
VP – VQ	United Kingdom
VR	Hong Kong
VS	United Kingdom
VT – VW	India
VX – VY	Canada
VZ	Australia
W	United States
XA – XI	Mexico
XJ – XO	Canada
XP	Denmark
XQ – XR	Chile
XS	China
XT	Burkina Faso
XU	Cambodia
XV	Vietnam
XW	Laos
XX	Macao
XY – XZ	Myanmar
Y2 – Y9	Germany
YA	Afghanistan
YB – YH	Indonesia
YI	Iraq
YJ	Vanuatu
YK	Syria
YL	Latvia
YM	Turkey
YN	Nicaragua
YO – YR	Romania
YS	El Salvador
YT – YU	Serbia
YV – YY	Venezuela
Z2	Zimbabwe
Z3	North Macedonia
Z8	South Sudan
ZA	Albania
ZB – ZJ	United Kingdom
ZK – ZM	New Zealand
ZN – ZO	United Kingdom
ZP	Paraguay
ZQ	United Kingdom
ZR – ZU	South Africa
ZV – ZZ	Brazil