When you hear a ham radio operator identify themselves by their callsign, you can tell where they are by the prefix of the callsign. For example, GM5XX is located in Scotland because of the GM part of the callsign. If a radio operator is not home (called being mobile), then GM5XX/3D2 is used. The 3D2 says that this Scottish laddie is in Fiji or Conway Reef, near Fiji.
Prefix, Country, Area (Europe, Asia, North and South Americs, Oceana, Africa)
1A, SMO Malta (Eu)
1S, 9M0 Spratly Is (As)
3A Monaco (Eu)
3B6, 3B7 St Brandon (Af)
3B8 Mauritius (Af)
3B9 Rodriguez Is (Af)
3C Equatorial Guinea (Af)
3C0 Pagalu (Af)
3D2 Conway Reef (Oc)
3D2 Fiji (Oc)
3DA, 3D6 Swaziland (Af)
3V Tunisia (Af)
3W Vietnam (As)
3X Guinea (Af)
3Y Bouvet (Af)
4J, UD Azerbaijan (As)
4L, UF Georgia (As)
4S Sri Lanka (As)
4U ITU Geneva (Eu)
4X Israel (As)
5A Libya (Af)
5B Cyprus (As)
5H Tanzania (Af)
5N Nigeria (Af)
5R Madagascar (Af)
5T Mauritania (Af)
5U Niger (Af)
5V Togo (Af)
5W Samoa (Oc)
5X Uganda (Af)
5Z Kenya (Af)
6W Senegal (Af)
6Y Jamaica (NA)
7O Yemen (As)
7P Lesotho (Af)
7Q Malawi (Af)
7X Algeria (Af)
8P Barbados (NA)
8Q Maldives (As)
8R Guyana (SA)
9A Croatia (Eu)
9G Ghana (Af)
9H Malta (Eu)
9J Zambia (Af)
9K Kuwait (As)
9L Sierra Leone (Af)
9M2, 9M4 Malaysia (As)
9M6, 9M8 East Malaysia (Oc)
9N Nepal (As)
9Q Zaire (Af)
9U Burundi (Af)
9V Singapore (As)
9X Rwanda (Af)
9Y Trinidad (SA)
A2 Botswana (Af)
A3 Tonga (Oc)
A4 Oman (As)
A5 Bhutan (As)
A6 Arab Emirates (As)
A7 Qatar (As)
A9 Bahrain (As)
AP Pakistan (As)
BV, BU, BW Taiwan (As)
BV9, BQ9 Pratas Is (As)
BY China (As)
C2 Nauru (Oc)
C3 Andorra (Eu)
C5 Gambia (Af)
C6 Bahamas (NA)
C9 Mozambique (Af)
CE Chile (SA)
CE0X San Felix (SA)
CE0Y Easter Is (SA)
CE0Z Juan Fernandez (SA)
CE9, KC4, VK0 Antarctica (An)
CN Morocco (Af)
CO Cuba (NA)
CP Bolivia (SA)
CT Portugal (Eu)
CT3 Madeira Is (Af)
CU, CT2 Azores (Eu)
CX Uruguay (SA)
CY0 Sable Is (NA)
CY9 St Paul Is (NA)
D2 Angola (Af)
D4 Cape Verde (Af)
D6 Comoros (Af)
DL Germany (Eu)
DU Philippines (Oc)
E3, ET2 Eritrea (Af)
E4 Palestine (As)
EA Spain (Eu)
EA6 Balearic Is (Eu)
EA8 Canary Is (Af)
EA9 Ceuta (Af)
EI Ireland (Eu)
EK, UG Armenia (As)
EL Liberia (Af)
EP Iran (As)
ER, UO Moldova (Eu)
ES, UR Estonia (Eu)
ET Ethiopia (Af)
EV, UC Belarus (Eu)
EX, UM Kyrgyzstan (As)
EY, UJ Tajikistan (As)
EZ, UH Turkmenistan (As)
F France (Eu)
FG Guadeloupe (NA)
FH Mayotte (Af)
FK, TX New Caledonia (Oc)
FM Martinique (NA)
FO French Polynesia (Oc)
FO0 Austral Is (NA)
FO0 Clipperton Is (NA)
FP St Pierre (NA)
FR Reunion (Af)
FS, FJ St Martin (NA)
FT_Z Amsterdam (Af)
FW Wallis, Futuna Is (Oc)
FY French Guiana (SA)
G, 2E, GX England (Eu)
GD, 2D, GT Isle of Man (Eu)
GI, 2I, GN N. Ireland (Eu)
GJ, 2J, GH Jersey (Eu)
GM, 2M, GS Scotland (Eu)
GU, 2U, GP Guernsey (Eu)
GW, 2W, GC Wales (Eu)
H4 Solomon Is (Oc)
H40 Temotu (Oc)
HA Hungary (Eu)
HB Switzerland (Eu)
HB0 Liechtenstein (Eu)
HC Ecuador (SA)
HC8 Galapagos Is (SA)
HH Haiti (NA)
HI Dominican Rep (NA)
HK Colombia (SA)
HK0 Malpelo Is (SA)
HK0 San Andres (NA)
HL So Korea (As)
HP Panama (NA)
HR Honduras (NA)
HS Thailand (As)
HV Vatican (Eu)
HZ Saudi Arabia
(As) I Italy (Eu)
IS Sardinia (Eu)
J2 Djibouti (Af)
J3 Grenada (NA)
J5 Guinea Bissau (Af)
J6 St Lucia (NA)
J7 Dominica (NA)
J8 St Vincent (NA)
JA Japan (As)
JD Ogasawara (As)
JT Mongolia (As)
JW Svalbard (Eu)
JX Jan Mayen (Eu)
JY Jordan (As)
K, W United States (NA)
KG4 Guantanamo Bay (NA)
KH0 Mariana Is (Oc)
KH1 Baker, Howland Is (Oc)
KH2 Guam (Oc)
KH3 Johnston Is (Oc)
KH4 Midway Is (Oc)
KH5 Palmyra, Jarvis Is (Oc)
KH5K Kingman Reef (Oc)
KH6, AH6, NH6, WH6 Hawaii (Oc)
KH7K Kure Is (Oc)
KH8, AH8, NH8, WH8 Am Samoa (Oc)
KH9, AH9, NH9, WH9 Wake Is (Oc)
KL, AL, NL, WL Alaska (NA)
KP1, NP1, WP1 Navassa Is (NA)
KP2, NP2, WP2 Virgin Is (NA)
KP4, KP3, NP3, WP3 Puerto Rico (NA)
KZ5 Canal Zone (NA)
LA Norway (Eu)
LU Argentina (SA)
LX Luxembourg (Eu)
LY, UP Lithuania (Eu)
LZ Bulgaria (Eu)
OA Peru (SA)
OD Lebanon (As)
OE Austria (Eu)
OH Finland (Eu)
OH0 Aland Is (Eu)
OJ0 Market Reef (Eu)
OK Czech Republic (Eu)
OM Slovakia (Eu)
ON Belgium (Eu)
OX, XP Greenland (NA)
OY Faroe Is (Eu)
OZ Denmark (Eu)
P2 Papua New Guinea (Oc)
P4 Aruba (SA)
P5 N. Korea (As)
PA Netherlands (Eu)
PJ2, PJ4, PJ9 Neth Antilles (SA)
PJ5, PJ6-8 St Maarten (NA)
PY Brazil (SA)
PY0F Fernando de Noronha (SA)
PY0P St Peter, St Paul Rocks (SA)
PY0T Trindade, Martin Vaz Is (SA)
PZ Surinam (SA)
R1FJ, 4K2 Franz Josef Land (Eu)
S0 Western Sahara (Af)
S2 Bangladesh (As)
S5 Slovenia (Eu)
S7 Seychelles (Af)
S9 Sao Tome, Principe (Af)
SM Sweden (Eu)
SP Poland (Eu)
ST Sudan (Af)
SU Egypt (Af)
SV Greece (Eu)
SV5 Dodecanese (Eu)
SV9 Crete (Eu)
SY Mt Athos (Eu)
T2 Tuvalu (Oc)
T30 West Kiribati (Oc)
T31 Central Kiribati (Oc)
T32 East Kiribati (Oc)
T33 Banaba (Oc)
T5 Somalia (Af)
T7 San Marino (Eu)
T8, KC6 Belau (Oc)
T9, 4N4 Bosnia (Eu)
TA Turkey (Eu, As)
TF Iceland (Eu)
TG Guatemala (NA)
TI Costa Rica (NA)
TI9 Cocos Is (NA)
TJ Cameroon (Af)
TK Corsica (Eu)
TL Central African Rep (Af)
TN Congo (Af)
TR Gabon (Af)
TT Chad (Af)
TU Ivory Coast (Af)
TY Benin (Af)
TZ Mali (Af)
UA Russia (Eu)
UA2 Kaliningrad (Eu)
UA9, UA0 Russia (Asiatic, As)
UK, UI Uzbekistan (As)
UN, UL Kazakhstan (As)
UR, UB Ukraine (Eu)
V2 Antigua (NA)
V3 Belize (NA)
V4 St Kitts, Nevis (NA)
V5 Namibia (Af)
V6, KC6 Micronesia (Oc)
V7, KX6 Marshall Is (Oc)
V8 Brunei (Oc)
VE Canada (NA)
VK Australia (Au)
VK0 Heard Is (Af)
VK0 Macquarie Is (Oc)
VK9L Lord Howe Is (Oc)
VK9M, VK9Z Mellish Reef (Oc)
VK9N Norfolk Is (Oc)
VK9W, VK9Z Willis Is (Oc)
VK9X Christmas Is (Oc)
VO Newfoundland (NA)
VP2E Anguilla (NA)
VP2M Montserrat (NA)
VP2V Br Virgin Is (NA)
VP5 Caicos Is (NA)
VP6, VR6 Pitcairn Is (Oc)
VP8, LU_Z Falkland Is (SA)
VP8, LU_Z S. Georgia Is (SA)
VP8, LU_Z S. Shetland Is (SA)
VP9 Bermuda (NA)
VQ9 Chagos (Af)
VR2, VS6 Hong Kong (As)
VU India (As)
VU7 Nicobar Is (As)
XE Mexico (NA)
XF4 Revilla Gigedo (NA)
XT Burkina Faso (Af)
XU Cambodia (As)
XW Laos (As)
XX9 Macao (As)
XZ Burma (As)
YA Afghanistan (As)
YB Indonesia (Oc)
YI Iraq (As)
YJ Vanuatu (Oc)
YK Syria (As)
YL, UQ Latvia (Eu)
YN Nicaragua (NA)
YO Romania (Eu)
YS El Salvador (NA)
YU Yugoslavia (Eu)
YV Venezuela (SA)
YV0 Aves Is (NA)
Z2 Zimbabwe (Af)
Z3, 4N5 Macedonia (Eu)
ZA Albania (Eu)
ZB Gibraltar (Eu)
ZC Cyprus (As)
ZD7 St Helena (Af)
ZD8 Ascension Is (Af)
ZD9 Gough Is (Af)
ZF Cayman Is (NA)
ZK1 Cook Is (Oc)
ZK2 Niue (Oc)
ZK3 Tokelau Is (Oc)
ZL New Zealand (Oc)
ZL7 Chatham Is (Oc)
ZL8 Kermadec Is (Oc)
ZL9 Campbell Is (Oc)
ZP Paraguay (SA)
ZS S. Africa (Af)
ZS8 Marion Is (Af)


In Canada, Ham Prefixes are designated by each province.

Nova Scotia NS (VE1, CY9, CYO);
Quebec QC (VE2, VA2);
Ontario ON (VE3,VA3);
Manitoba MB (VE4);
Saskatchewan SK (VE5);
Alberta AB (VE6);
British Columbia BC (VE7);
Northwest Territories NT (VE8);
New Brunswick NB (VE9);
Newfoundland and Labrador NF (VO1, VO2);
Yukon YU or YT (VY1);
and Prince Edward Island PE (VY2).


Depending on when you recieved your ham license in Canada, you are either given a 2 letter suffix (This was a while ago, and you couldn't choose the letters), Or a 3 letter suffix (This is more recent, and you are allowed to choose the letters).

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