747-237-8636

Unfamiliar number. "Los Angeles, CA" on caller ID, so nothing to verify the caller's claim to be "US Customs and Border Protection." My voice mail caught the end of what I'm assuming to be a robocall, since it continued through my greeting:  "So please give us a call back to US Customs and Border Protection on (garbled) number 747-237-8636. I repeat, 747-237-8636. Now if I don't get a call from you we'll have to issue an arrest warrant under your name and get you arrested. So give us a call back as soon as you get this message. Thank you."
The voice on the robocall had what sounded to be an East Indian accent, which  may or may not mean anything. Have heard about scams like this one, that prey on undocumented people, and am suspicious that this is an example of just such a scam.