I stopped getting spam phone calls months ago. Something definitely changed in the last year, or maybe 2 years.

It was ridiculously often in 2020/2021/sometime in 2022 maybe?

Hasn’t changed for me. I am constantly pestered by spoofed-local-number spam calls at both my personal number and my work number, in two different area codes. My job requires me to be available on the phone so it’s particularly frustrating because of how often I have to pick them up just to hear about a warranty on yet another car I’ve never owned.

That’s a bummer. I am using ATT’s mobile service, on an iPhone. Maybe different carriers/phones have different implementations?

Also ATT/iPhone. I think Google Voice (my work line) routes through a different network and I do think I get more spam calls there.

Similar experience here. I got absolutely ridiculous numbers of spam calls up until maybe early 2022? Now I get almost none in comparison. Like 2-3 a month as opposed to tons every week before.

I've gotten 6 spam calls so far today.

The traceback rules are really what did that but I think those were in the same bill that mandated STIR/SHAKEN. STIR/SHAKEN just makes spoofing caller ID more difficult.

Are the provisions of STIR not necessary for the traceback rules to be applicable?

My understanding is that without STIR a gateway acting in good faith can't definitively identify malicious traffic, and a gateway acting in bad faith can claim any malicious traffic they forward appeared legitimate.