Answer
Number of different area codes possible = 8$\times$2$\times$9 = 144
Work Step by Step
The first digit could be any number from 2 through 9, then the number of ways to express first digit = 8
The second digit is either 0 or 1, then the number of way to express second digit = 2
The third digit could be any number except 0, then the number of way to express third digit = 9
Number of different area codes possible = 8$\times$2$\times$9 = 144
