What year was a three digit telephone number used?

Question

Anyone know what year a three digit telephone number was used?

Thanks.

Answer 1

911 still is...if this is a math question, get your teacher fired for teaching you pointless c**p

Answer 2

1884-1889 in the British Colonies

Answer 3

1937 - the first 3 digit number of 9-9-9 was used in London.

9-1-1 was first used in the U.S in 1968 making it the first 3-digit number used in the U.S.