. . . when you throw out words like, "Possible IRS scam." That's just silly, given the information you offer. It's a "possible" anything anyone wants to insert in the blank. By the same token, EVERY call from an unknown number is a possible IRS scam; even if it's your brother, using a new phone.
I wouldn't normally post anything about the call I got from this number, because all I can say with any certainty is, "I got a call."