This is SSA Bloomington. Not sure how or why a local number shows up on caller ID, but it is the Social Security Administration and they will leave a message with their toll-free number and extension to call back.
They also called my mother regarding money for me and my brother. I thought it was fishy as well so I called the ssa national office and they said that is the real number for the local Bloomington office and that I do have money that is owed. So I called back the guy who called me and I still have not received the money from over 6 months ago.