Sounds to me like you are part of the scam. How could someone pull off a call from the number recited....they were in that office idiot. The map point to a southern state as to where this number is from, not CA. Also, they call on one 800 number and ask you to call back on a different 800 number. I do not think so. You should have signed in as ScamMan.
This number is Legitimate! It is the OUT-GOING-ONLY number for Social Security processing office in Richmond, CA.
You cannot call it back! It is just like a DO-NOT-REPLY email.
Their toll-free number for incoming calls is (877) 772-3794.
If you don't know the extension, they can connect you directly to representative who called you.
This number is the Social Security Administration - District Office on Garrity Way in Richmond, CA. My caller ID showed "Social Security Admin". My wife received a call from them yesterday advising her as to when she can expect to start receiving SSA benefits. This was a follow-up call from an inquiry my wife made to the central SSA office in Washington DC.
The 510-970 1100 number is not a scam. It is a valid Social Security number. Soc. Sec called me left a message to call back on another 510 area code number the next morning, Saturday April 11, 2015. Gave only the 1st name. When I called Saturday morning he was busy but would call back in 10 minutes. He called back and the number showed up as the 510 970-1100 caller ID. He was very professional and did not ask for my social security number but just had some questions on my online form about my dependent child which he named. Not invasive at all. Very polite. Said he would mail a form out so my dependent could get an additional payout from social security. Very helpful and put my mind to rest. This is the real Social Security!