Then slowly he reached for the telephone receiver and punched an eight-digit number.

The sender's screen name was an eight-digit number, not even a word.

It was from someone who used an eight-digit number as a screen name, which gave me pause.

A special case of non-geographic numbers are eight-digit numbers in the form 3/400n-nnnn.

The solution is to use eight-digit numbers as in France, so each area code yields 100 million phone addresses.

To reach Paris from a regional city dial 16, followed by 1 and the eight-digit number.

To telephone between two regional French cities simply dial the eight-digit number.

To reach a regional city from outside France dial the eight-digit number.

So a caller in Brussels would need only to dial 800, plus an eight-digit number.

In the 100 million eight-digit serial numbers from 00000000 to 99999999, there are 10,000 that read the same forward and backward.