Who called from 2021121222

That may be, but he knows your number works so he still can make a bit of money. Does that number look like it'd be one to answer? Check out that fourth digit. Bet on an overseas caller from numbers that look like this, i.e., calls to avoid in all ways.

Received a call from this number and guessing it was a fake call I answered "Pronto chi parla?" which means Hello who's speaking? in Italian, so they hung up.

Received call from 2021121222  "Name not Found"  did not answer... putting a block on the number

Have you been successful in placing a block? Xfinity tells me it's not a valid number.

Received a call from a female with a foreign accent, telling me that there are illegal users on my computer. Ridiculous! I don't have a computer!