Hellp meee brainlest in my had part 2

International calls require the use of a country code. many country codes a 3-digit numbers. country codes do not begin with a 0 or 1. there are no restrictions on the second and third digits. how many different 3-digit country codes are possible?

Its worth 10000000 points need asap if you answer correctly ill mark brainliest

What is the range for 31,39,29,34,37,24,36,33,34,28