700-799
- 700: Chinle, Arizona, USA
- 701: Junk Bond Observatory, Sierra Vista, Arizona, USA
- 702: Joint Obs. for cometary research, Socorro, New Mexico, USA (now the site of Magdalena Ridge Observatory)
- 703: Catalina Sky Survey, Tucson, Arizona, USA
- 704: Lincoln Laboratory ETS, New Mexico, USA (now Lincoln Near-Earth Asteroid Research)
- 705: Apache Point, Sunspot, New Mexico, USA (Apache Point Observatory)
- 706: Salida, Colorado, USA
- 707: Chamberlin field station, Colorado, USA
- 708: Chamberlin Observatory, Denver, Colorado, USA
- 709: W & B Observatory, Cloudcroft, New Mexico, USA
- 710: MPO Observatory, Florissant, Colorado, USA
- 711: McDonald Observatory, Fort Davis, Texas, USA
- 712: USAF Academy Observatory, Colorado Springs, Colorado, USA
- 713: Thornton, Colorado, USA
- 714: Bagdad, Arizona, USA
- 715: Jornada Observatory, Las Cruces, New Mexico, USA
- 716: Palmer Divide Observatory, Colorado Springs, Colorado, USA
- 717: Prude Ranch, Texas, USA
- 718: University of Utah, Tooele, Utah, USA
- 719: Etscorn Observatory, Socorro, New Mexico, USA ( Frank T. Etscorn Campus Observatory New Mexico Tech Astronomy Club)
- 720: Universidad de Monterrey, Nuevo León, Mexico
- 721: Lime Creek, Nebraska, USA (Lime Creek Observatory)
- 722: Missouri City, Texas, USA
- 723: Cottonwood Observatory, Ada, Oklahoma, USA
- 724: National Observatory, Tacubaya, Mexico (Observatorio Astronómico Nacional; Observatorio de Tacubaya)
- 725: Fair Oaks Ranch, Fair Oaks Ranch, Texas, USA (Fair Oaks Ranch Observatory)
- 726: Brainerd, Minnesota, USA (Fire in the Sky Observatory)
- 727: Zeno Observatory, Edmond, Oklahoma, USA
- 728: Corpus Christi, Texas, USA
- 729: Glenlea Astronomical Observatory, Winnipeg, Manitoba, Canada
- 730: University of North Dakota, Grand Forks, North Dakota, USA
- 731: Rose-Hulman Observatory, Terre Haute, Indiana, USA
- 732: Oaxaca, Oaxaca, Mexico
- 733: Allen, Texas, USA
- 734: Farpoint Observatory, Eskridge, Kansas, USA
- 735: George Observatory, Needville, Texas, USA
- 736: Houston, Texas, USA
- 737: New Bullpen Observatory, Alpharetta, Georgia, USA
- 738: Observatory of the State University of Missouri, Missouri, USA
- 739: Sunflower Observatory, Olathe, Kansas, USA
- 740: SFA Observatory, Nacogdoches, Texas, USA
- 741: Goodsell Observatory, Northfield, Minnesota, USA
- 742: Drake University, Des Moines, IA
- 743: University of Minnesota, Minneapolis, Minnesota, USA
- 744: Doyan Rose Observatory, Indianapolis, Indiana, USA
- 745: Glasgow, Missouri, USA
- 746: Brooks Astronomical Observatory, Mt. Pleasant, Michigan, USA
- 747: Highland Road Park Observatory, Louisiana, USA (a.k.a Baton Rouge Observatory)
- 748: Van Allen Observatory, Iowa City, Iowa, USA
- 749: Oakwood, Georgia, USA
- 750: Hobbs Observatory, Fall Creek, Wisconsin, USA
- 751: Lake Saint Louis, Missouri, USA
- 752: Puckett Observatory, Mountain Town, Georgia, USA
- 753: Washburn Observatory, Madison, Wisconsin, USA
- 754: Yerkes Observatory, Williams Bay, Wisconsin, USA
- 755: Optec Observatory, Michigan, USA
- 756: Dearborn Observatory, Evanston, Illinois, USA
- 757: High Point, North Carolina, USA
- 758: BCC Observatory, Cocoa, Florida, USA (Astronaut Memorial Planetarium & Observatory; BCC = Brevard Community College)
- 759: Nashville, Tennessee, USA
- 760: Goethe Link Observatory, Brooklyn, Indiana, USA
- 761: Zephyrhills, Florida, USA (Quail Hollow Observatory)
- 762: Four Winds Observatory, Lake Leelanau, Michigan, USA
- 763: King City, Ontario, Canada
- 764: Puckett Observatory, Stone Mountain, Georgia, USA
- 765: Cincinnati, Ohio, USA (Cincinnati Observatory)
- 766: Michigan State University Obs., East Lansing, Michigan, USA
- 767: Ann Arbor, Michigan, USA (Angell Hall Observatory)
- 768: Dearborn, Michigan, USA (UM-Dearborn Observatory)
- 769: McMillin Observatory, Columbus, Ohio, USA
- 770: Crescent Moon Observatory, Columbus, Ohio, USA
- 771: Boyeros Observatory, Havana, Cuba (Observatorio de Rancho Boyeros)
- 772: Boltwood Observatory, Stittsville, Ontario, Canada
- 773: Warner and Swasey Observatory, Cleveland, Ohio, USA
- 774: Warner and Swasey Nassau Station, Chardon, Ohio, USA
- 775: Sayre Observatory, South Bethlehem, Pennsylvania, USA
- 776: Foggy Bottom, Hamilton, New York, USA (Foggy Bottom Observatory)
- 777: Toronto, Ontario, Canada
- 778: Allegheny Observatory, Pittsburgh, Pennsylvania, USA
- 779: David Dunlap Observatory, Richmond Hill, Ontario, Canada
- 780: Leander McCormick Observatory, Charlottesville, Virginia, USA
- 781: Quito, Ecuador
- 782: Quito, comet astrograph station, Ecuador
- 783: Rixeyville, Virginia, USA
- 784: Stull Observatory, Alfred University, New York, USA
- 785: Fitz-Randolph Observatory, Princeton, New Jersey, USA
- 786: U.S. Naval Obs., Washington (since 1893), District of Columbia, USA
- 787: U.S. Naval Obs., Washington (before 1893), District of Columbia, USA
- 788: Mount Cuba Observatory, Wilmington, Delaware, USA
- 789: Litchfield Observatory, Clinton, Oneida County, New York, USA (Hamilton College)
- 790: Dominion Observatory, Ottawa, Ontario, Canada
- 791: Flower and Cook Observatory, Philadelphia, Pennsylvania, USA
- 792: University of Rhode Island, Quonochontaug, Rhode Island, USA
- 793: Dudley Observatory, Albany (before 1893), New York, USA
- 794: Vassar College Observatory, Poughkeepsie, New York, USA
- 795: Rutherford, New York, USA
- 796: Stamford, Connecticut, USA
- 797: Yale Observatory, New Haven, Connecticut, USA (Yale University Observatory)
- 798: Yale Observatory, Bethany, Connecticut, USA (Yale University Observatory)
- 799: Winchester, Massachusetts, USA
Read more about this topic: List Of Observatory Codes