Doesn't leave message. Just hangs up.

No Message. Just hangs up after phone is answered. Caller ID just says "San Mateo".

Caller ID says, "Out of Area".  They just hang up.  Today I got another with the same last 4 digits but it was 555-7105 claiming to be DIR ASST CA calling me for the third time.  Thank goodness my Panasonic phone lets me block these guys.  They are relentless.

Another spoofed call from National Renewal Energy Center robocalling front for A1 Solar Power, Van Nuys, CA.  This is one of dozens of fake numbers that they use in violating the federal Do Not Call regulations.  They have called me residence using different numbers up too 8-10 times a day via their robocalling automatic dialing. Complain to the FCC--they have heard ALOT about them.