United States

The United States Department of State uses HF radio solely for emergency purposes, as part of the Emergency and Evacuation Networks.^[1]^[2] The HF-equipped stations include all U.S. embassies, consulates general, and consulates; selected DOS domestic offices; and selected U.S. military bases.

Frequencies

The DOS primarily uses the following 10 frequencies, all on the upper sideband. Links are established using 2G ALE (MIL-STD-188-141A) by scanning the channels in descending order, from the highest (24883.6) to the lowest (5748.6).

5748.6 kHz
6902.6 kHz
8058.6 kHz
10733.6 kHz
11168.6 kHz
13503.6 kHz
16283.6 kHz
18248.6 kHz
20810.6 kHz
24883.6 kHz

Aside from those frequencies, the DOS stations may also appear on the USAF HFGCS channels.

Operation

The U.S. diplomatic missions are divided into regional networks, comprising a network control station and a number of neighboring outposts.^[3] Each network has a designated day of the week and time of day for radio checks, usually around 10 AM or 3 PM local time.

A typical DOS radio check may be heard on the following recording:

Stations

The following is a non-exhaustive list of stations active on the DOS frequencies, with the network control stations highlighted in yellow. The callsigns may also be seen with suffixes, such as a single letter, "OS" (off-site), or "MO" (mobile).

KAG29
KAL71 - Consulate General Thessaloniki
KBF70 - Embassy Ashgabat
KBF95 - Embassy Baku
KBR29 - Embassy Tbilisi
KBX26
KBZ76 - OECD Mission Paris
KCA30 - Embassy Yerevan
KCT58
KCT78
KCY63
KDC39
KEA32
KEB25 - Embassy Singapore
KEH34 - Embassy Baghdad
KEH35
KEH36
KEH37
KEH38
KEM99 - Embassy Kuwait City
KEN20
KEN21
KEN22 - Embassy Riyadh
KEN23
KFB90 - Embassy Dakar
KGA47 - Embassy Jakarta
KGA56
KGA70
KGA74
KGB60
KGC83 - Embassy Canberra
KGC89
KJA86 - Embassy Podgorica
KJB20
KJB33 - NATO Mission Brussels
KJC45
KLU52 - Fort Huachuca
KMN93 - Springfield, VA
KMN94 - Fort Lauderdale, FL
KMN95 - Warrenton, VA
KRC80
KRC81 - Embassy Kingston
KRC82 - Embassy Nassau
KRC83
KRC84
KRH48
KRH50 - Embassy Beijing
KRH51
KRH52
KRH53 - Consulate General Guangzhou
KRH54 - Embassy Seoul
KRH57
KRH58
KRH60
KRH61
KRH62
KRH63 - Consulate General Hong Kong
KRH64
KRH65
KRH66
KRH67
KRH68 - Embassy Bangkok
KRH69
KRH70
KRH71 - Embassy Manila
KRH72
KRH73
KRH74
KRZ61
KRZ64
KRZ65
KRZ66
KSI84
KSK20
KSN21 - Embassy Yaoundé
KTR67
KTR68
KTR69
KTR70 - Embassy Cotonou
KTR71 - Consulate General Lagos
KVX50 - Embassy Moscow
KVX52 - Embassy Minsk
KVX53 - Embassy Vilnius
KVX54 - Embassy Riga
KVX55 - Embassy Tallinn
KVX56 - Embassy Helsinki
KWA22 - Consulate Ponta Delgada
KWA37 - Permanent Mission Geneva
KWA43 - Consulate General Milan
KWA54 - Embassy Valletta
KWA64
KWA80 - Consulate General Florence
KWB48 - RIMC Frankfurt
KWB69 - RIMC Bangkok
KWE41 - Embassy Addis Ababa
KWE92 - Embassy Djibouti
KWF22 - Embassy Khartoum
KWF28
KWF79
KWG41
KWH49 - Embassy N'Djamena
KWI26 - Embassy Bangui
KWJ34
KWJ58
KWJ66
KWK20 - Embassy Conakry
KWK42 - Embassy Nouakchott
KWK53 - Embassy Freetown
KWK90
KWK91
KWK92
KWK93 - Consulate General Matamoros
KWK94
KWK95
KWK96
KWK97
KWK98
KWK99
KWL27
KWL63
KWL90
KWL91
KWL92 - Embassy Managua
KWL93
KWL94
KWL95
KWL96
KWL97
KWL98
KWL99
KWM24
KWN63
KWN79 - Embassy Nairobi
KWN90
KWN91
KWN92
KWN93 - Embassy Bogotá
KWN94
KWN95
KWN96 - Embassy Lima
KWN97
KWN98
KWN99
KWP90
KWP91
KWP92
KWP93
KWP94
KWP95
KWP96
KWP97 - Embassy Algiers
KWP98 - Embassy Tunis
KWQ36 - Embassy Stockholm
KWR86 - Embassy Prague
KWR91 - Embassy Cairo
KWR92
KWR93
KWR95 - Embassy Amman
KWR96 - Embassy Beirut
KWR98
KWR99
KWS78 - Embassy Bratislava
KWS90 - Embassy Budapest
KWS91 - Embassy Ljubljana
KWS92 - Embassy Zagreb
KWS93 - Embassy Belgrade
KWS94 - Embassy Sarajevo
KWS95 - Embassy Tirana
KWS96 - Embassy Skopje
KWS97
KWS98
KWS99 - Embassy Sofia
KWT49 - Consulate General Amsterdam
KWT50 - Embassy The Hague
KWT51 - Embassy Brussels
KWT55
KWT90
KWT91 - Embassy Berlin
KWT92
KWT93 - Consulate General Frankfurt
KWT94 - Embassy Paris
KWT95 - Embassy Luxembourg
KWT96
KWT97 - Consulate General Munich
KWT98 - Embassy Bern
KWU47 - Embassy Kyiv
KWV71 - Embassy Ankara
KWW25 - Embassy Oslo
KWX57 - Embassy Warsaw
KWX58 - Consulate General Kraków
KWX59 - Embassy Vienna
KWX62
KWX72
KWX90 - Embassy Dublin
KWX91 - Consulate General Edinburgh
KWX92 - Embassy London
KWX93 - Embassy Reykjavik
KWX94 - Consulate General Barcelona
KWX95 - Embassy Madrid
KWX96 - Embassy Lisbon
KWX99 - Embassy Copenhagen
KWY20
KWY21
KWY22
KWY23 - Consulate General Belfast
KWY24 - Embassy Dhaka
KWY25
KWY26
KWY28 - Embassy Mbabane
KWY29 - Consulate General Peshawar
KWY48
KWY49 - Embassy Kabul
KWY50
KWY51 - Embassy Banjul
KWY52
KWY53
KWY54
KWY55
KWY56
KWY59 - Embassy New Delhi
KWY91
KWY92
KWY93 - Consulate General Chennai
KWY94 - Embassy Ouagadougou
KWY95
KWY96
KWY99
KWZ99 - Embassy Athens
KXV44 - Consulate General Naples
KXV45 - Embassy Rome
KXV46 - Consulate General Marseille
WNG739
WNG741
WNG746
WNG748
WNG751
WNG764
WNG767 - Embassy Pristina
WNG768 - AIT Taipei
WNG780
WNG790
WNG799
WNG803
WNG806 - Consulate General Yekaterinburg
WNG808
WNG811
WNG813 - Embassy Dili
WNG817
WNG818
WNG824 - AIT Kaohsiung
WNG827
WNG828
WNG831
WNG833
WNG834
WNG835
WNG836
WNG837
WNG838

Networks

The following is a non-exhaustive list of networks seen on the DOS frequencies.

Region	NCS	Members
Caribbean	KRC81	KJB20, KJC45, KRC80, KRC82, KRC83, KRC84, WNG811
Mexico	KWK96	KWK90, KWK91, KWK92, KWK93, KWK94, KWK95, KWK97, KWK98, KWK99, WNG746, WNG828
Central America	KWL92	KWL90, KWL91, KWL93, KWL94, KWL95, KWL96
	KWL98	KWL97, KWL99, KWN90, KWN91, KWN92, WNG748, WNG838
Western South America	KWN96	KWN93, KWN94, KWN95, KWN97
	KWN98	KWN99, KWP90, KWP91, KWP92, KWP93, KWP94, WNG751
Northwestern Europe	KWX90	KBZ76, KJB33, KWT49, KWT50, KWT51, KWT94, KWX91, KWX92, KWX93, KWY23
Western Europe	KWT93	KWA37, KWT55, KWT90, KWT91, KWT92, KWT95, KWT96, KWT97, KWT98
Southwestern Europe	KWX96	KWA22, KWX94, KWX95
Western Mediterranean	KXV45	KWA43, KWA54, KWA80, KXV44, KXV46
Central Europe	KWX57	KJA86, KWR86, KWS78, KWS90, KWS91, KWS92, KWS93, KWS94, KWS95, KWS96, KWX58, KWX59, WNG767
Northeastern Europe	KVX53	KVX50, KVX52, KVX54, KVX55, KVX56, KWQ36, KWU47, KWW25, KWX99, WNG806
Southeastern Europe	KWV71	KAG29, KAL71, KWA64, KWS97, KWS98, KWS99, KWZ99
Maghreb	KWP95	KWP96, KWP97, KWP98
West Africa	KFB90	KWJ34, KWJ58, KWK20, KWK42, KWK53, KWL27, KWL63, KWY51
Gulf of Guinea	KWY94	KTR67, KTR68, KTR69, KTR70, KTR71, KWY91, KWY96
Central Africa	KSN21	KSK20, KWH49, KWI26, KWJ66, KWM24, KWY95, WNG808, WNG827
Horn of Africa	KWE41	KWE92, KWF22, KSI84, WNG835
East Africa	KWN79	KWF28, KWF79, KWN63, KWY50
Southern Africa	KWY21	KWX62, KWX72, KWY20, KWY22, KWY28, KWY48, KWY53, KWY99
Caucasus	KBF95	KBF70, KBR29, KCA30
Eastern Mediterranean	KWR91	KWR92, KWR93, KWR95, KWR96, KWR98
Iraq	KEH34	WNG831, WNG833, WNG834
Persian Gulf	KEN22	KEH35, KEH36, KEH37, KEH38, KEM99, KEN20, KEN21, KEN23, KWR99
Central Asia	KCT78	KCT58, KCY63, KDC39, WNG790
South Asia	KWY59	KWY24, KWY25, KWY26, KWY29, KWY49, KWY52, KWY54, KWY55, KWY56, KWY92, KWY93, WNG837
Northern East Asia	KRH54	KRH50, KRH52
Southern East Asia	KRH71	KRH51, KRH53, KRH63, KRH73, WNG768, WNG824
Mainland Southeast Asia	KRH68	KRH64, KRH65, KRH66, KRH67, KRH69, KRH70, WNG817, WNG818
Maritime Southeast Asia	KEB25	KGA47, KGA56, KGA70, KRH72, KRH74, WNG813, WNG836
Oceania	KGC83	KGA74, KGC89, KRZ61, KRZ64

References

"5 FAH-2 H-713.4 Emergency and Evacuation (E&E) Networks". Foreign Affairs Manual. Accessed June 17, 2020.
"5 FAH-2 H-732.1 Emergency and Evacuation (E&E) Networks". Foreign Affairs Manual. Accessed June 17, 2020.
"5 FAH-2 H-720 HIGH FREQUENCY (HF)". Foreign Affairs Manual. Accessed June 17, 2020.