Getting 5 to 10 spam calls / voicemails - what changed?

I’ve noticed that spam calls and voicemails have been getting exponentially worse. I used to receive maybe two spam calls a week, things like loan offers, IRS, extended car warranties, and similar scams. That was annoying, but manageable.

Lately, though, it feels like the volume is increasing rapidly. More calls, more voicemails, now multiple in a single day.

Has something changed recently: telecom regulation, call filtering systems, or spammer tactics that might explain this spike?

I just want to get educated. Is there some AI involved?