Who called from 2146120000

Got a call from this number. The caller left no voice message.

Caller ID says Cellular Call. No one on line. Line disconnects after a few seconds of empty air time. Number just rings when you call it back. They've called three times in the last three days.

Called twice already this morning. Line disconnects when I answer.

Called asking for "Mike". Once told he isn't in the office, just hangs up. When I called the number 1-214-612-0000 back, it is either busy or no one answers.

THEY ASK IF SOME ONE WAS IN AND THEY WERE NOT AND THEN ASKED IF I WAS IN COLLECTIONS AND THEN HUNG UP ON ME