Received quite a few, with no messages.. about to get blocked.

Came up SSI on caller ID. Asked for head of household. Hung up and blocked.

First call comes up as SSI on caller ID.
Next calls come up as 8137208112 on caller ID.

Have any of you applied or called about soc security income?  Its for low income assistance.  If it was a real call, wouldnt they leave a message?   I have cancer and applied for assistance with their other departments but didnt apply.for SSI.  makes me wonder if their systems have hackers or employees stealing contact info.  or could be spoofing coincidence.   They keep calling with no.messages and im not answering it.   I get about ten scammer calls a day and I block them all.  Should I block this one?

Received call on cell phone from Survey Sampling claiming to be a independent survey analysis company. You know, your opinion counts and so forth. Here is the
Wiki link: https://en.wikipedia.org/wiki/Survey_Sampling_International