Nov 7, 2013
I first received a call from 510-970-1100 the day after applying for Social Security retirement benefits. I Block 510* calls so I reviewed the logs associated with this number on this forum. Later I received an Email from this person. Still later I received a letter from this person. All the information checked out. I eventually called this person at a direct number on a separate phone and we compared information. While on my "separate" phone, she called me and that call ID showed "510-970-1100". I picked up before blocking and it was her.
So, In my experience, it would seem that Outgoing calls from SSA in Northern California from Richmond, CA show up as "510-970-1100" and if allowed to leave a message(ie, not blocked), they leave a 877-772-3794 and extension number.
I give this information to the forum for clarification of my experience only. I personally keep a log of all calls to my number via a DIGITONE Call Blocker and documented manually to my Excell SS that is now over 3yrs and 1200 separate individual bogus calls. This Free Forum has been very benifical to me! Thanks for all your participation!