| II | AAK | Ala Archa, Kyrgyzstan | |  |  | 42.639 | 74.494 | 1645 | -- |
| II | ABKT | Alibek, Turkmenistan | | | | 37.93 | 58.119 | 678 | -- |
| II | ABPO | Ambohimpanompo, Madagascar | | | | -19.018 | 47.229 | 1528 | -- |
| IU | ADK | Adak, Aleutian Islands, Alaska | | |  | 51.882 | -176.684 | 130 | Q330 |
| IU | AFI | Afiamalu, Samoa | | | | -13.909 | -171.777 | 706 | Q680 |
| II | ALE | Alert, N.W.T., Canada | | | | 82.503 | -62.35 | 60 | -- |
| IU | ANMO | Albuquerque, New Mexico, USA | | | | 34.946 | -106.457 | 1820 | Q330 |
| IU | ANTO | Ankara, Turkey | | | | 39.868 | 32.793 | 1090 | Q680 |
| CU | ANWB | Willy Bob, Antigua and Barbuda | | | | 17.669 | -61.786 | 39 | Q330 |
| II | ARU | Arti, Russia | | | | 56.43 | 58.562 | 250 | -- |
| II | ASCN | Butt Crater, Ascension Island | | | | -7.933 | -14.36 | 173 | -- |
| CU | BBGH | Gun Hill, Barbados | | | | 13.143 | -59.559 | 180 | Q330 |
| IU | BBSR | Bermuda Biological Station for Research, St George's Bermuda | | | | 32.371 | -64.696 | 30 | Q330 |
| CU | BCIP | Isla Barro Colorado, Panama | | | | 9.166 | -79.837 | 61 | Q330 |
| GT | BDFB | Brasilia, Brazil | | |  | -15.642 | -48.015 | 1195 | -- |
| II | BFO | Black Forest Observatory, Schiltach, Germany | | | | 48.332 | 8.331 | 589 | -- |
| GT | BGCA | Bogoin, Central African Republic | | | | 5.176 | 18.424 | 676 | -- |
| IU | BILL | Bilibino, Russia | | | | 68.065 | 166.453 | 320 | Q680 |
| IC | BJT | Baijiatuan, Beijing, China | | | | 40.018 | 116.168 | 197 | Q680 |
| II | BORG | Borgarfjordur, Asbjarnarstadir, Iceland | | | | 64.747 | -21.327 | 110 | -- |
| GT | BOSA | Boshof, South Africa | | | | -28.614 | 25.256 | 1280 | -- |
| II | BRVK | Borovoye, Kazakhstan | | | | 53.058 | 70.283 | 330 | -- |
| IU | CASY | Casey, Antarctica | | | | -66.279 | 110.535 | 10 | Q680 |
| IU | CCM | Cathedral Cave, Missouri, USA | | | | 38.056 | -91.245 | 222 | Q680 |
| IU | CHTO | Chiang Mai, Thailand | | | | 18.814 | 98.944 | 420 | Q330 |
| II | CMLA | Cha de Macela, Sao Miguel Island, Azores | | | | 37.764 | -25.524 | 429 | -- |
| II | COCO | West Island, Cocos (Keeling) Islands | | | | -12.19 | 96.835 | 1 | -- |
| IU | COLA | College Outpost, Alaska, USA | | | | 64.874 | -147.862 | 200 | Q330 |
| IU | COR | Corvallis, Oregon, USA | | | | 44.586 | -123.305 | 110 | Q330 |
| GT | CPUP | Villa Florida, Paraguay | | | | -26.331 | -57.331 | 105 | -- |
| IU | CTAO | Charters Towers, Australia | | | | -20.088 | 146.255 | 357 | Q680 |
| IU | DAV | Davao, Philippines | | | | 7.07 | 125.579 | 150 | Q680 |
| GT | DBIC | Dimbokro, Cote d'Ivoire | | | | 6.67 | -4.857 | 125 | -- |
| II | DGAR | Diego Garcia, Chagos Islands, Indian Ocean | | | | -7.412 | 72.453 | 1 | -- |
| IU | DWPF | Disney Wilderness Preserve, Florida, USA | | | | 28.11 | -81.433 | 30 | Q680 |
| II | EFI | Mount Kent, East Falkland Island | | | | -51.675 | -58.064 | 110 | -- |
| IC | ENH | Enshi, Hubei Province, China | | | | 30.276 | 109.494 | 500 | Q680 |
| II | ERM | Erimo, Hokkaido Island, Japan | | | | 42.015 | 143.157 | 40 | -- |
| II | ESK | Eskdalemuir, Scotland, UK | | | | 55.317 | -3.205 | 242 | -- |
| II | FFC | Flin Flon, Canada | | | | 54.725 | -101.978 | 338 | -- |
| IU | FUNA | Funafuti, Tuvalu | | | | -8.526 | 179.197 | 20 | Q680 |
| IU | FURI | Mt. Furi, Ethiopia | | | | 8.895 | 38.68 | 2570 | Q680 |
| IU | GNI | Garni, Armenia | | | | 40.148 | 44.741 | 1609 | Q680 |
| IU | GRFO | Grafenberg, Germany | | | | 49.691 | 11.22 | 384 | Q330 |
| CU | GRGR | Grenville, Grenada | | | | 12.132 | -61.654 | 195 | Q330 |
| CU | GRTK | Grand Turk, Turks and Caicos Islands | | | | 21.511 | -71.133 | 12 | Q330 |
| CU | GTBY | Guantanamo Bay, Cuba | | | | 19.927 | -75.111 | 79 | Q330 |
| IU | GUMO | Guam, Mariana Islands | | | | 13.589 | 144.868 | 170 | Q680 |
| IC | HIA | Hailar, Neimenggu Province, China | | | | 49.27 | 119.741 | 620 | Q680 |
| IU | HKT | Hockley, Texas | | | | 29.962 | -95.838 | -413 | Q680 |
| IU | HNR | Honiara, Solomon Islands | | | | -9.439 | 159.947 | 100 | Q680 |
| II | HOPE | Hope Point, South Georgia Island | | | | -54.284 | -36.488 | 20 | -- |
| IU | HRV | Adam Dziewonski Observatory (Oak Ridge), Massachusetts, USA | | | | 42.506 | -71.558 | 200 | Q330 |
| IU | INCN | Inchon, Republic of Korea | | | | 37.478 | 126.624 | 80 | Q330 |
| IU | JOHN | Johnston Island, USA | | | | 16.733 | -169.529 | 2 | Q680 |
| II | JTS | Las Juntas de Abangares, Costa Rica | | | | 10.291 | -84.953 | 340 | -- |
| II | KAPI | Kappang, Sulawesi, Indonesia | | | | -5.014 | 119.752 | 300 | -- |
| IU | KBL | Kabul, Afghanistan | | | | 34.541 | 69.043 | 1920 | Q330 |
| IU | KBS | Ny-Alesund, Spitzbergen, Norway | | | | 78.915 | 11.938 | 90 | Q680 |
| II | KDAK | Kodiak Island, Alaska, USA | | | | 57.783 | -152.583 | 152 | -- |
| IU | KEV | Kevo, Finland | | | | 69.757 | 27.003 | 100 | Q330 |
| IU | KIEV | Kiev, Ukraine | | | | 50.701 | 29.224 | 180 | Q680 |
| IU | KIP | Kipapa, Hawaii, USA | | | | 21.42 | -158.011 | 110 | Q680 |
| II | KIV | Kislovodsk, Russia | | | | 43.955 | 42.686 | 1054 | -- |
| IU | KMBO | Kilima Mbogo, Kenya | | | | -1.127 | 37.252 | 1950 | Q680 |
| IC | KMI | Kunming, Yunnan Province, China | | | | 25.123 | 102.74 | 1975 | Q680 |
| IU | KNTN | Kanton, Kiritibati | | | | -2.774 | -171.719 | 20 | Q330 |
| IU | KONO | Kongsberg, Norway | | | | 59.649 | 9.598 | 216 | Q330 |
| IU | KOWA | Kowa, Mali | | | | 14.497 | -4.014 | 321 | Q680 |
| II | KURK | Kurchatov, Kazakhstan | | | | 50.715 | 78.62 | 184 | -- |
| II | KWAJ | Kwajalein Atoll, Pacific Ocean | | | | 8.802 | 167.613 | 0 | -- |
| GT | LBTB | Lobatse, Botswana, Africa | | | | -25.02 | 25.6 | 1128 | -- |
| IU | LCO | Las Campanas Astronomical Observatory, Chile | | | | -29.011 | -70.7 | 2300 | Q680 |
| GT | LPAZ | La Paz , Bolivia | | | | -16.17 | -68.08 | 4817 | -- |
| IC | LSA | Tibet, China | | | | 29.703 | 91.127 | 3660 | Q680 |
| IU | LSZ | Lusaka, Zambia | | | | -15.278 | 28.188 | 1200 | Q330 |
| IU | LVC | Limon Verde, Chile | | | | -22.613 | -68.911 | 2960 | Q330 |
| II | LVZ | Lovozero, Russia | | | | 67.898 | 34.651 | 630 | -- |
| IU | MA2 | Magadan, Russia | | | | 59.576 | 150.77 | 339 | Q680 |
| IU | MACI | Morro de la Arena, Canary Islands | | |  | 28.25 | -16.508 | 1674 | Q330 |
| IU | MAJO | Matsushiro, Japan | | | | 36.546 | 138.204 | 405 | Q330 |
| IU | MAKZ | Makanchi, Kazakhstan | | | | 46.808 | 81.977 | 600 | Q680 |
| II | MBAR | Mbarara, Uganda | | | | -0.602 | 30.738 | 1390 | -- |
| IU | MBWA | Marble Bar, Western Australia | | | | -21.159 | 119.731 | 190 | Q680 |
| IC | MDJ | Mudanjiang, Heilongjiang Province, China | | | | 44.617 | 129.591 | 270 | Q680 |
| IU | MIDW | Midway Island, USA | | | | 28.216 | -177.37 | 20 | Q680 |
| II | MSEY | Mahe, Seychelles | | | | -4.674 | 55.479 | 475 | -- |
| IU | MSKU | Masuku, Gabon | | | | -1.656 | 13.612 | 312 | Q680 |
| II | MSVF | Monasavu, Fiji | | | | -17.745 | 178.053 | 801.1 | -- |
| CU | MTDJ | Mount Denham, Jamaica | | | | 18.226 | -77.535 | 925 | Q330 |
| II | NIL | Nilore, Pakistan | | | | 33.651 | 73.269 | 629 | -- |
| II | NNA | Nana, Peru | | | | -11.988 | -76.842 | 575 | -- |
| II | NRIL | Norilsk, Russia | | | | 69.505 | 88.441 | 92 | -- |
| IU | NWAO | Narrogin, Australia | | | | -32.928 | 117.239 | 380 | Q680 |
| II | OBN | Obninsk, Russia | | | | 55.115 | 36.567 | 160 | -- |
| IU | OTAV | Otavalo, Ecuador | | | | 0.238 | -78.451 | 3510 | Q330 |
| IU | PAB | San Pablo, Spain | | | | 39.545 | -4.35 | 950 | Q330 |
| II | PALK | Pallekele, Sri Lanka | | | | 7.273 | 80.702 | 460 | -- |
| IU | PAYG | Puerto Ayora, Galapagos Islands | | | | -0.674 | -90.286 | 270 | Q680 |
| IU | PET | Petropavlovsk, Russia | | | | 53.023 | 158.65 | 110 | Q680 |
| II | PFO | Pinon Flat, California, USA | | | | 33.611 | -116.456 | 1280 | -- |
| GT | PLCA | Paso Flores, Argentina | | | | -40.73 | -70.55 | 1050 | -- |
| IU | PMG | Port Moresby, New Guinea | | | | -9.405 | 147.16 | 90 | Q680 |
| IU | PMSA | Palmer Station, Antarctica | | | | -64.774 | -64.049 | 40 | Q680 |
| IU | POHA | Pohakuloa, Hawaii, USA | | | | 19.757 | -155.533 | 1990 | Q680 |
| IU | PTCN | Pitcairn Island, South Pacific | | | | -25.071 | -130.095 | 220 | Q680 |
| IU | PTGA | Pitinga, Brazil | | | | -0.731 | -59.967 | 237 | Q330 |
| IC | QIZ | Qiongzhong, Hainan Province, China | | | | 19.029 | 109.844 | 240 | Q680 |
| IU | QSPA | South Pole Remote Earth Science Observatory (Quiet Zone) | | | | -89.929 | 144.438 | 2850 | Q680 |
| IU | RAIO | Rainier, Oregon, USA | | | | 46.04 | -122.885 | 11 | Q680 |
| IU | RAO | Raoul, Kermadec Islands | | | | -29.245 | -177.929 | 60 | Q680 |
| IU | RAR | Rarotonga, Cook Islands | | | | -21.212 | -159.773 | 28 | Q680 |
| II | RAYN | Ar Rayn, Saudi Arabia | | | | 23.523 | 45.503 | 631 | -- |
| IU | RCBR | Riachuelo, Brazil | | | | -5.827 | -35.901 | 400 | Q330 |
| II | RPN | Rapanui, Easter Island, Chile | | | | -27.127 | -109.334 | 110 | -- |
| IU | RSSD | Black Hills, South Dakota, USA | | | | 44.121 | -104.036 | 2090 | Q330 |
| II | SACV | Santiago Island, Cape Verde | | | | 14.97 | -23.608 | 387 | -- |
| IU | SAML | Samuel, Brazil | | | | -8.949 | -63.183 | 120 | Q330 |
| IU | SBA | Scott Base, Antarctica | | | | -77.849 | 166.757 | 50 | Q680 |
| CU | SDDR | Presa de Sabenta, Dominican Republic | | | | 18.982 | -71.288 | 589 | Q330 |
| IU | SDV | Santo Domingo, Venezuela | | | | 8.884 | -70.634 | 1620 | Q680 |
| IU | SFJD | Sondre Stromfjord, Greenland | | | | 66.996 | -50.621 | 330 | Q330 |
| II | SHEL | Horse Pasture, St. Helena Island | | | | -15.959 | -5.746 | 537 | -- |
| IU | SJG | San Juan, Puerto Rico | | | | 18.109 | -66.15 | 420 | Q680 |
| IU | SLBS | Sierra la Laguna Baja California Sur, Mexico | | | | 23.686 | -109.944 | 825 | Q330 |
| IU | SNZO | South Karori, New Zealand | | | | -41.309 | 174.704 | 120 | Q680 |
| IC | SSE | Shanghai, China | | | | 31.095 | 121.191 | 40 | Q680 |
| IU | SSPA | Standing Stone, Pennsylvania | | | | 40.636 | -77.888 | 270 | Q680 |
| II | SUR | Sutherland, South Africa | | | | -32.38 | 20.812 | 1770 | -- |
| IU | TARA | Tarawa Island, Republic of Kiribati | | | | 1.355 | 172.923 | 20 | Q330 |
| IU | TATO | Taipei, Taiwan | | | | 24.974 | 121.497 | 160 | Q330 |
| II | TAU | Hobart, Tasmania, Australia | | | | -42.91 | 147.32 | 132 | -- |
| IU | TEIG | Tepich, Yucatan, Mexico | | | | 20.226 | -88.276 | 40 | Q680 |
| CU | TGUH | Tegucigalpa, Honduras | | | | 14.057 | -87.273 | 1151 | Q330 |
| IU | TIXI | Tiksi, Russia | | | | 71.634 | 128.867 | 40 | Q680 |
| II | TLY | Talaya, Russia | | | | 51.681 | 103.644 | 579 | -- |
| IU | TRIS | Tristan da Cunha | | | | -37.068 | -12.315 | 60 | Q680 |
| IU | TRQA | Tornquist, Argentina | | | | -38.057 | -61.979 | 540 | Q330 |
| IU | TSUM | Tsumeb, Namibia | | | | -19.202 | 17.584 | 1260 | Q330 |
| IU | TUC | Tucson, Arizona | | | | 32.31 | -110.785 | 910 | Q330 |
| IU | ULN | Ulaanbaatar, Mongolia | | | | 47.865 | 107.053 | 1610 | Q680 |
| GT | VNDA | Wright Valley (Bull Pass) Antarctica | | | | -77.52 | 161.85 | 151 | -- |
| IU | WAKE | Wake Island | | | | 19.283 | 166.652 | 20 | Q330 |
| IU | WCI | Wyandotte Cave, Indiana, USA | | | | 38.229 | -86.294 | 210 | Q680 |
| IC | WMQ | Urumqi, Xinjiang Province, China | | | | 43.814 | 87.705 | 850 | Q680 |
| II | WRAB | Tennant Creek, NT, Australia | | | | -19.934 | 134.36 | 366 | -- |
| IU | WVT | Waverly, Tennessee, USA | | | | 36.13 | -87.83 | 170 | Q680 |
| IC | XAN | Xi'an, China | | | | 34.031 | 108.924 | 630 | Q680 |
| IU | XMAS | Kiritimati Island, Republic of Kiribati | | | | 2.045 | -157.446 | 20 | Q680 |
| II | XPF | Pinon Flat, California, USA | | | | 33.611 | -116.456 | 1280 | -- |
| IU | YAK | Yakutsk, Russia | | | | 62.031 | 129.68 | 110 | Q680 |
| IU | YSS | Yuzhno Sakhalinsk, Russia | | | | 46.959 | 142.76 | 150 | Q680 |
