800

[Calendar]  The last year of the 8th century.

 

[Education]  The best possible SAT (Scholastic Aptitude Test) Verbal score and SAT Mathematics score.

 

[Education]  The best possible GRE (Graduate Record Examinations) Verbal score and Quantitative score, on the scale 200-800, with 10-point increments.

 

[History]  The approximate length (miles) of the Santa Fe Trail, ending at Santa Fe, New Mexico.

 

[Measure]  The customary volume (ml, milliliters) of a wine bottle in the U.S. and Bordeaux, France is 705 ml.  Before 1945, French wine bottles were mostly 800ml, commonly for Burgundy, Champagne and Rhone.

 

[Phone]  The original area code for the toll-free (or WATS: Wide Area Telecommunications Service) telephone number dialing within the U.S. and Canada.

 

[Sport]  The standard ranges of swimming/tracking competitions (meters): 50, 100, 200, 400, 800 and 1500. Also, for tracking: 2000, 3000, 5000 and 10000.

 

[Tech.]  The light sensitivity (speed) of most commercially popular camera films: ISO 100-200-400-800.

 

[World]  The ISO country code for Uganda. (ISO-3166) 

 

801

[Calendar]  The first year of the 9th century.

 

[Sport]  One of the popular beginning scores to play down to exactly zero in a dartboard game tournament: 301, 501, 601, 801 and 1001…, which always end with 01. Higher scores are usually played by teams.

 

802

[Phone]  The only telephone area code for the state of Vermont, U.S.

 

803

[Math.]  (Sequence of numbers 80…032 = 640…0480…09)

8032 = 644,809 = (6+44+809)2

8033 = 517,781,627 = (51+7+781+62+7)3.

 

804

[World]  The ISO country code for Ukraine. (ISO-3166)

 

805

[Library]  ISBN-0-805 is the International Standard Book Number for books published by Henry Holt & Company.

 

[Math.]  (Sequence of  numbers 80…052 = 640…080…025)

8052 = 648,025 = (6+4+802+5)2.

 

806

[Math.]

13×93 = 1,209 = 31×39

26×93 = 2,418 = 62×39

13×62 = 806 = 31×26.

 

807

[World]  The ISO country code for Macedonia, (was Republic of Yugoslav). (ISO-3166)

 

808

[Phone]  The only telephone area code for the state of Hawaii, U.S.

 

809

[Math.]  A prime number.

 

[Phone]  The telephone area codes for the Dominican Republic (within U.S./NANPA) are 809 and 829.


800-809

[Library]  Numbers 800-899 are the first 3 digits in Dewey Decimal Classification System call numbers for library books in Literature. Numbers 800-809 are for general & dictionary works.