My number is in the federal do not call list. I used to manually block every single number from spam calls, but now I gave up.

I’ll just never answer a call unless it’s from a known number and I’m expecting it. Otherwise I’ll just return it later if it’s important enough.

My guess is that phone network operators don’t care because they haven’t figured out a way to make money blocking these calls.

At the same time, the same carriers are going out of their way to block text messages from businesses that legitimately use services like Twilio to communicate with their users/customers. Why? Because the alternative for these businesses is to pay about $3k setup fee + $3k/quarter to get a shortcode for the privilege of texting the carriers customers - the same customers the carriers don’t care about protecting from spam phone calls.