It was a hang up call. I don't answer the phone anymore. I get calls all the time and don't answer. I've told Drs. ect. to call me from the original phone number or leave a message with your name if that's possible. Everyone thinks you have Verizon caller ID because of the phone number they're dialing. Many don't anymore as it was a nuisance charge on a landline and many landline numbers are now cell phone numbers that only show numbers not names.
Called, no message, blocked. Seem to get a lot of these after Comcast hikes its internet only service prices. I would guess it's Comcast sales, direct or farmed out. Either way, screw 'em.