On the caller ID, it came up as Air Reports, and afetr 30 seconds, the recorded message started with a horn blowing into my ear. The phone number I have is on the national do not call list.
Just got a call from them here in Maryland. It was a Robocall offering free in-home air testing, press 1 for more info. No opt-out, and I'm also on the Do Not Call list. Will be reporting them.