J00-J99
- J00: Segorbe, Spain
- J01: Observatorio Cielo Profundo, Oviedo, Spain
- J02: Busot, Spain
- J03: Gothers Observatory, St. Dennis
- J04: ESA Optical Ground Station, Tenerife, Canary Islands, Spain
- J05: Bootes Observatory, Boecillo
- J06: Trent Astronomical Observatory, Clifton
- J07: Observatorio SPAG Monfragüe, Palazuelo-Empalme
- J08: Observatorio Zonalunar, Puzol
- J09: Balbriggan
- J10: Alicante
- J11: Matosinhos
- J12: Caraquiz
- J13: La Palma-Liverpool Telescope, La Palma, Canary Islands, Spain (Roque de los Muchachos Observatory)
- J14: La Corte
- J15: Muxagata
- J16: An Carraig Observatory, Northern Ireland An Carraig Observatory
- J17: Ragdon
- J18: Dingle Observatory, Montgomery, Wales, U.K.
- J19: El Maestrat
- J20: Aravaca
- J21: El Boalo
- J22: Tacande Observatory, La Palma, Canary Islands, Spain
- J23: Centre Astronomique de La Couyere
- J24: Observatorio Altamira, Canary Islands, Spain
- J25: Penamayor Observatory, Nava
- J26: The Spaceguard Centre, Knighton
- J27: El Guijo Observatory, Spain
- J28: Jaén, Spain (Observatorio Jaén)
- J29: Observatorio Nira, Tias
- J30: Observatorio Ventilla, Madrid
- J31: La Axarquia
- J32: Aljaraque
- J33: University of Hertfordshire Obs., Bayfordbury
- J34: La Fecha
- J35: Tucci Observatory, Martos
- J36: Observatorio DiezALaOnce, Illana
- J37: Huelva
- J38: Observatorio La Vara, Valdés
- J39: Ingenio
- J40: Málaga, Spain
- J41: Raheny
- J42: Puzol
- J43: Oukaïmeden Observatory, Morocco
- J44: Observatorio Iturrieta, Alava
- J45: Observatorio Montana Cabreja Vega de San Mateo, Gran Canaria.
- J46: Observatorio Montana Blanca, Tias
- J47: Observatorio Nazaret
- J48: Observatory Mackay, La Laguna
- J49: Santa Pola
- J50: La Palma-NEON, Canary Islands, Spain
- J51: Observatorio Atlante, Tenerife, Canary Islands, Spain
- J52: Observatorio Pinsoro
- J53: Posadas
- J54: Bradford Robotic Telescope, Tenerife, Canary Islands, Spain
- J55: Los Altos de Arguineguin Observatory
- J56: Observatorio La Avejerilla
- J57: Centro Astronómico Alto Turia, Valencia, Spain
- J58: Brynllefrith Observatory, Llantwit Fardre, Wales, UK
- J59: Observatorio Linceo, Santander
- J60: Tocororo Observatory, Arquillinos
- J61: Brownstown Observatory, Kilcloon
- J62: Kingsland Observatory, Boyle
- J63: San Gabriel
- J64: La Mata
- J65: Celbridge
- J66: Kinver
- J67: Observatorio La Puebla de Vallbona
- J68: Tweenhills Observatory, Hartpury, Gloucestershire, England, UK
- J69: North Observatory, Clanfield, UK
- J70: Obs. Astronómico Vega del Thader, El Palmar
- J71: Willow Bank Observatory, Lancashire, England, UK
- J72: Valle del Sol
- J73: Quainton, Buckinghamshire, England, UK (Quainton Observatory)
- J74: Bilbao
- J75: OAM Observatory, La Sagra, Spain (Observatorio Astronómico de La Sagra)
- J76: La Murta, Spain
- J77: Golden Hill Observatory, Stourton Caundle, Dorset, England, UK
- J78: Murcia
- J79: Observatorio Calarreona, Aguilas
- J80: Sainte Helene
- J81: Guirguillano
- J82: Leyland
- J83: Olive Farm Observatory, Hoghton
- J84: South Observatory, Clanfield
- J85: Makerstoun
- J86: Sierra Nevada Observatory (Observatorio de Sierra Nevada, Spain)
- J87: La Cañada (Observatorio de La Cañada (La Cañada Observatory), Ávila, Spain)
- J88: Strawberry Field Obs., Southampton
- J89: Tres Cantos Observatory
- J90: West Challow
- J91: Alt emporda Observatory, Figueres
- J92: Beaconsfield
- J93: Mount Tuffley Observatory, Gloucester, England, UK
- J94: Abbeydale, Gloucester, England, UK
- J95: Great Shefford, Berkshire, England, UK
- J96: Observatorio de Aras de los Olmos (OAO) - Universidad de Valencia, Aras de los Olmos, Valencia, Spain
- J97: Alginet
- J98: Observatorio Manises
- J99: Burjassot
Read more about this topic: List Of Observatory Codes