000-099
- 000: Greenwich, England, UK (Royal Observatory, Greenwich)
- 001: Crowborough, England, UK (Isaac Roberts)
- 002: Rayleigh, Chelmsford borough, Essex, England (Observatory Raleigh)
- 003: Montpellier, France (Observatoire de la Babote)
- 004: Toulouse, France (Observatoire de Toulouse)
- 005: Meudon, France (Observatoire de Paris-Meudon)
- 006: Fabra Observatory, Barcelona, Spain (Observatori Fabra)
- 007: Paris, France (Observatoire de Paris)
- 008: Algiers-Bouzaréah, Algeria (CRAAG: Centre de Recherche en Astronomie, Astrophysique et Geophysique)
- 009: Berne-Uecht, Switzerland (Sternwarte Uecht, Solar Observatory at Uecht)
- 010: Caussols, France (CERGA: Centre de recherches en géodynamique et astrométrie)
- 011: Wetzikon, Switzerland (Sternwarte Wetzikon)
- 012: Uccle, Belgium (Observatoire Royal de Belgique/Koninklijke Sterrenwacht van België)
- 013: Leiden, Netherlands (Sterrewacht Leiden)
- 014: Marseilles, France (Observatoire de Marseille)
- 015: Utrecht, Netherlands (Museum Sterrenwacht Sonnenborgh)
- 016: Besançon, France (Observatoire de Besançon)
- 017: Hoher List, Germany (Observatorium Hoher List)
- 018: Düsseldorf-Bilk, Germany (Sternwarte Bilk)
- 019: Neuchâtel, Switzerland (Observatoire Cantonal de Neuchâtel)
- 020: Nice, France (Observatoire de Nice)
- 021: Karlsruhe, Germany (Sternwarte Karlsruhe)
- 022: Pino Torinese, Italy (Osservatorio Astronomico di Torino)
- 023: Wiesbaden, Germany (Sternwarte Wiesbaden)
- 024: Heidelberg-Königstuhl, Germany (Landessternwarte Heidelberg-Königstuhl)
- 025: Stuttgart, Germany (Sternwarte Stuttgart)
- 026: Berne-Zimmerwald, Switzerland (Observatorium Zimmerwald)
- 027: Milan, Italy (Osservatorio Astronomico di Brera)
- 028: Würzburg, Germany (Sternwarte der Universität Würzburg)
- 029: Hamburg-Bergedorf, Germany (Hamburger Sternwarte)
- 030: Arcetri Observatory, Florence, Italy (Osservatorio Astrofisico di Arcetri)
- 031: Sonneberg, Germany (Sternwarte Sonneberg)
- 032: Jena, Germany (Astrophysikalisches Institut und Universitäts-Sternwarte Jena)
- 033: Karl Schwarzschild Observatory, Tautenburg, Germany (Karl-Schwarzschild-Observatorium)
- 034: Monte Mario Observatory, Rome, Italy (Osservatorio Astronomico di Roma Sede di Monte Mario)
- 035: Copenhagen (Copenhagen University Observatory, Københavns Universitet Astronomisk Observatorium), Denmark
- 036: Castel Gandolfo, Vatican City (Specola Vaticana)
- 037: Collurania Observatory, Teramo, Italy (Osservatorio Astronomico di Collurania-Teramo)
- 038: Trieste, Italy (Osservatorio Astronomico di Trieste)
- 039: Lund, Sweden (Lunds Universitet Institutionen för astronomi, Lund Observatory)
- 040: Lohrmann Institute, Dresden, Germany
- 041: Innsbruck, Austria (Universitäts-Sternwarte Innsbruck)
- 042: Potsdam, Germany (Einstein Tower)
- 043: Asiago Astrophysical Observatory, Padua, Italy (Osservatorio Astrofisico di Asiago)
- 044: Capodimonte Observatory, Naples, Italy (Osservatorio Astronomico di Capodimonte)
- 045: Vienna (since 1879), Austria (Universitäts-Sternwarte Wien)
- 046: Kleť Observatory, České Budějovice, Czech Republic (Hvězdárna Kleť)
- 047: Poznań, Poland (Obserwatorium Astronomiczne Uniwersytet im. Adama Mickiewicza w Poznaniu, Poznań Observatory)
- 048: Hradec Králové, Czech Republic (Hvězdárna Hradec Králové)
- 049: Uppsala-Kvistaberg, Sweden (Kvistabergs Observatorium)
- 050: Stockholm (before 1931), Sweden (Stockholms observatorium)
- 051: Cape, South Africa (Royal Observatory at the Cape of Good Hope)
- 052: Stockholm-Saltsjöbaden (since 1931), Sweden (Stockholms observatorium, Saltsjöbaden Observatory)
- 053: Konkoly Observatory, Budapest (since 1934), Hungary (Konkoly Obszervatórium)
- 054: Brorfelde, Denmark (Brorfelde Observatoriet)
- 055: Kraków (Cracow), Poland (Kraków Observatory)
- 056: Skalnaté Pleso, Slovakia (Observatórium Skalnaté pleso)
- 057: Belgrade, Serbia (Belgrade Astronomical Observatory (AOB); Астрономске опсерваторије у Београду; Astronomske opservatorije u Beogradu)
- 058: Königsberg, German Empire (before 1944)
- 059: Lomnický štít (Lomnický peak, Slovakia)
- 060: Warsaw-Ostrowik, Poland (Warsaw University Observatory)
- 061: Uzhgorod, Ukraine
- 062: Turku, Finland (Iso-Heikkilä Observatory, University of Turku; Turun observatorio, Turun yliopisto)
- 063: Turku-Tuorla, Finland (Tuorla Observatory, University of Turku; Tuorlan observatorio, Turun yliopisto)
- 064: Turku-Kevola, Finland (Kevola Observatory, University of Turku; Kevolan tähtitorni, Turun yliopisto)
- 065: Traunstein, Germany
- 066: Athens, Greece (National Observatory of Athens)
- 067: Lvov University Observatory, Ukraine
- 068: Lvov Polytechnic Institute, Ukraine
- 069: Baldone, near Riga, Latvia
- 070: Vilno (before 1883), Russian Empire
- 071: NAO Rozhen, Smolyan, Bulgaria (Bulgarian National Astronomical Observatory, a.k.a. Rozhen National Astronomical Observatory)
- 072: Scheuren Observatory, Germany
- 073: Bucharest, Romania
- 074: Boyden Observatory, Bloemfontein, South Africa
- 075: Tartu, Estonia (Tartu Observatory)
- 076: Johannesburg-Hartbeespoort, South Africa (Union Observatory Annex, Hartbeespoort)
- 077: Yale-Columbia Station, Johannesburg, South Africa (Yale-Columbia Southern Station, 1925–1951 )
- 078: Johannesburg, South Africa (Union Observatory)
- 079: Radcliffe Observatory, Pretoria, South Africa
- 080: Istanbul, Turkey
- 081: Leiden Station, Johannesburg, South Africa (Leiden Southern Station, Hartbeespoort)
- 082: St. Pölten , Austria
- 083: Golosseevo-Kiev, Ukraine
- 084: Pulkovo Observatory, Russia
- 085: Kiev, Ukraine
- 086: Odessa, Ukraine
- 087: Helwan, Egypt
- 088: Kottomia, Egypt
- 089: Nikolaev, Ukraine (Nikolaev Astronomical Observatory)
- 090: Mainz, Germany
- 091: Observatoire de Nurol, Aurec sur Loire, France
- 092: Torun-Piwnice, Poland (Piwnice Obserwatorium Astronomiczne; Piwnice Astronomical Observatory)
- 093: Skibotn, Norway
- 094: Crimea-Simeïs, Ukraine (Crimean Astrophysical Observatory-Simeis)
- 095: Crimea-Nauchnij, Ukraine (Crimean Astrophysical Observatory-Nauchnij)
- 096: Merate, Italy
- 097: Wise Observatory, Mitzpeh Ramon, Israel
- 098: Asiago Observatory, Cima Ekar, Italy (Stazione osservativa di Asiago Cima Ekar)
- 099: Lahti, Finland (Lahti Ursa Observatory; Lahden Ursan tähtitorni)
Read more about this topic: List Of Observatory Codes