H00-H99
- H00: Tyrone
- H01: Magdalena Ridge Observatory, New Mexico Tech, New Mexico, USA
- H02: Sulphur Flats Observatory, La Cueva, New Mexico, USA
- H03: Sandia View Observatory, Rio Rancho, New Mexico, USA
- H04: Santa Fe, New Mexico, USA
- H05: Edmund Kline Observatory, Deer Trail, Colorado, USA
- H06: RAS Observatory, Mayhill, New Mexico, USA (RAS (Remote Astronomical Society) Observatory of New Mexico; a.k.a. New Mexico Skies Observatory)
- H07: 7300 Observatory, Cloudcroft, New Mexico, USA
- H08: BlackBird Observatory, Cloudcroft, New Mexico, USA
- H09: Antelope Hills Observatory, Bennett, New Mexico, USA
- H10: Tzec Maun Foundation Observatory, Mayhill, New Mexico, USA
- H11: LightBuckets Observatory, Rodeo, New Mexico, USA (LightBuckets re-located to B10 in 2011)
- H12: TechDome, Mayhill, New Mexico, USA
- H13: Lenomiya Observatory, Casa Grande, Arizona, USA
- H14: Morning Star Observatory, Tucson, Arizona, USA
- H15: ISON-NM, Mayhill, New Mexico, USA
- H16: HUT Observatory, Eagle, Colorado, USA
- H17: Angel Peaks Observatory, Colorado, USA
- H18: Vail, Arizona, USA
- H19: Lone Star Observatory, Caney, Oklahoma, USA
- H20: Eastern Illinois University Obs., Charleston, Illinois, USA
- H21: Astronomical Research Observatory, Westfield, Illinois, USA
- H22: Terre Haute, Indiana, California, USA
- H23: Pear Tree Observatory, Valparaiso
- H24: J. C. Veen Observatory, Lowell
- H25: Harvest Moon Observatory, Northfield
- H26: Doc Greiner Research Observatory, Janesvillle
- H27: Moonglow Observatory, Warrensburg
- H28: Preston Hills Observatory, Celina
- H29: Ivywood Observatory, Edmond
- H30: University of Oklahoma Observatory, Norman, Oklahoma, USA
- H31: Star Ridge Observatory, Weimar
- H32: Texas A&M Physics Observatory, College Station, Texas, USA
- H33: Bixhoma Observatory, Bixby, Oklahoma, USA
- H34: Chapel Hill
- H35: Leavenworth
- H36: Sandlot Observatory, Scranton, Kansas, USA
- H37: Grems Timmons Observatories, Graettinger
- H38: Timberline Observatory, Urbandale
- H39: S.O.S. Observatory, Minneapolis, Minnesota, USA
- H40: Nubbin Ridge Observatory
- H41: Petit Jean Mountain, Arkansas, USA
- H42: Wartburg College Observatory, Waverly
- H43: Conway
- H44: Cascade Mountain
- H45: Petit Jean Mountain South, Arkansas, USA
- H46: Ricky Observatory, Blue Springs, Missouri, USA
- H47: Vicksburg, Mississippi, USA
- H48: PSU Greenbush Observatory, Pittsburg, USA
- H49: ATU Astronomical Observatory, Russellville, Arkansas, USA
- H50: University of Central Arkansas Obs., Conway, Arkansas, USA
- H51: Greiner Research Observatory, Verona, Wisconsin, USA
- H52: Hawkeye Observatory, Durand
- H53: Thompsonville
- H54: Cedar Drive Observatory, Pulaski
- H55: Astronomical Research Observatory, Charleston, Illinois, USA (Antares Observatory)
- H56: Northbrook Meadow Observatory
- H57: Ohio State University Observatory, Lima, Ohio, USA
- H58: NASA/MSFC ALaMO, Redstone Arsenal
- H59: Prairie Grass Observatory, Camp Cullom
- H60: Heartland Observatory, Carmel, Indiana, USA
- H61: Newcastle
- H62: Calvin College Observatory
- H63: DeKalb Observatory, Auburn
- H64: Thomas More College Observatory, Crestview Hills
- H65: Waltonfields Observatory, Walton
- H66: Yellow Springs
- H67: Stonegate Observatory, Ann Arbor, Michigan, USA
- H68: Red Barn Observatory, Ty Ty, Georgia, USA
- H69: Ohio Wesleyan University, Ohio, USA
- H70: Asheville
- H71: Chula
- H72: Evelyn L. Egan Observatory, Fort Myers, Florida, USA
- H73: Lakeland Astronomical Observatory, Kirtland, Florida, USA
- H74: Bar J Observatory, New Smyrna Beach, Florida, USA
- H75: Indian Hill North Observatory, Huntsburg
- H76: Oakridge Observatory, Miami, Florida, USA
- H77: Buehler Observatory
- H78: University of Nariño Observatory, Pasto
- H79: York University Observatory, Toronto, Ontario, Canda
- H80: Halstead Observatory, Princeton
- H81: Hartung-Boothroyd Observatory, Ithaca, New York, USA
- H82: CBA-NOVAC Observatory, Front Royal, Virginia, USA
- H83: Timberlake Observatory, Oakton
- H84: Northview Observatory, Mendon
- H85: Silver Spring, Maryland, USA
- H86: CBA-East Observatory, Laurel, Maryland, USA
- H87: Fenwick Observatory, Richmond
- H88: Hope Observatory, Belcamp
- H89: Galaxy Blues Observatory, Gatineau, Québec, Canada
- H90: Ottawa, Ontario, Canada
- H91: Reynolds Observatory, Potsdam, New York, USA
- H92: Arcturus Observatory
- H93: Berkeley Heights
- H94: Cedar Knolls
- H95: NJIT Observatory, Newark, New Jersey, USA
- H96: Observatoire des Pléïades, Mandeville
- H97: Talcott Mountain Science Center, Avon, Connecticut, USA
- H98: Dark Roseanne Obs., Middlefield, Connecticut, USA
- H99: Sunhill Observatory, Newton, Massachusetts, USA
Read more about this topic: List Of Observatory Codes