Called 18 march, we weren't home, no message left. No calls since. I'm current on the two loans I have, so I suspect they are fishing for knowledge about a neighbor or something. My CLID said "unavailable".
I once had a deadbeat neighbor, used to get a lot of calls from "old friends" of his, or "army buddies" or whatever. "Just have him call me at this number" was the message. I finally asked them to stop calling me, which they (surprisingly) complied with.