Use Phone Blocker Pro to block telemarketing and spam numbers, using a pattern you can block all numbers that match the pattern.
Each pattern can block up to 10,000 numbers and you can create as many patterns as you want.

Phone Blocker Pro is a tool that permit you to block the spam numbers that follow a pattern and still receive calls from numbers that aren't in your contacts, like potential clients or calls from people you just don't know yet.