Your answer can be found here
On the back of @Ray_YC's post.
There's no charge if the number change is due to receiving unwelcome or unsolicited calls.
That's free for the 1st and 2nd number change ($55 per subsequent number change request).
Changing to a specific number costs $77.00
You can also select a Gold number (easy to remember number usually consisting of consecutive numbers or the same number in a row). We charge $132.00 if you'd like to change to a Gold number.