Unknown caller. when you answer the caller hangs up. Call back you get "you were in a servery, but the time has expired, press 1 to remove your self from the list"
This happen to me about 3 weeks ago. I press 1 and still getting calls.
Just got a call from this number. I called back and a recording said the time for the survey
had expired and gave an option to press 1 to have my number removed. The same (survey)
called Friday from a different number (253) 382-9987 and I pressed 1 to opt out. So today they
just use a different number. This is on my unlisted cell phone