This has just ben done recently.
No area code. Just first three numbers of phone.......455-7518
455 * 80 = 36400 +1 + 36401 * 250 = 91000250 +7518 + 7518 = 9115286
+ 7518 + 7518 = 9115286 - 250 = 9115036 /2 =
4557518
Now all this to find out a number I already knew.
It's magic.