I don't answer the phone anymore unless I know exactly who it is.
How unfortunate it is that telemarketers and scum bags claiming to be from Google, Osha, health insurance, AT&T, IRS, etc... call me all the time with untraceable phone numbers, recordings, and scams, never leaving a message other than "press 1 to be removed", which in itself shows them that the number is valid, so they resell it to some other scam artist. Being listed in the "National do not call registry" is a joke.

Who ever it was that called from this number did not leave a message - may they burn in hell.