I'm pretty familiar with the various apps for blocking telemarketing calls, but in recent months, I've been getting a real onslaught of robocalls that spoof numbers from my local exchange, apparently on the fly.
Existing telemarketing databases wouldn't be able to identify those because the numbers are random and never the same. I'm also pretty sketched out by services like TrueCaller and Hiya that mine your contacts and add your friends to their public databases. I'm a pretty big jerk, but not that big.
And I don't want to put a number block on my local exchange because, well, it's my local exchange and I get legitimate calls from it sometimes.
The only thing I've seen that seems to work on those is a feature that makes callers take a manual step like pressing 1 to complete their call. It's available on CenturyLink landlines, but I don't know if there are any mobile providers that offer it. Is there any chance you guys could look into something like that?