Blocking certain number ranges

[anonymousmoose]

I run two call blocking apps:
CallHound and SimpleCallBlocker

Thing is, I'm getting calls from a +8818XXXXXX extension.
As soon as I block one, I get a call from another similar number with the same extension.

Both my apps don't recognise them as valid number. How can I block entire ranges from these numbers?

 

[C DM]

I run two call blocking apps:
CallHound and SimpleCallBlocker

Thing is, I'm getting calls from a +8818XXXXXX extension.
As soon as I block one, I get a call from another similar number with the same extension.

Both my apps don't recognise them as valid number. How can I block entire ranges from these numbers?

I think some call blocking apps might allow for something like that, with WideProtect being one of those.