This caller apparently had not been noticed in internet comments until a few days ago, around March 13,14.
There was no message left here.
This call coincides with the call of one particular other known debt collection scammer (among many) who call here from time to time, so it might be a caller who is up to no good!
This caller, as others mentioned, simply hangs up. I work for a Dr.'s office, so that is not helpful...in addition, per my call log, calls often come from them in the late evening PST time.