Got a call.  Answered and no one was there.  Blocking the call.

Got a call, but did not answer. Caller did not leave a message. The Caller ID was U82614555404395*.   Do they really think that caller ID would make someone want to answer the phone?

Got 2 calls from this number and when I answered they didn't say anything then hung up. After the second call I called back and it says the number has been disconnected

It's a scammer. This number was SPOOFED on the caller ID hence the reason you couldn't call back. Best not to call scam numbers back in the first place since they can get your number.

Number called but my scam blocker recognized the number and blocked the call.