Who called from 5182992212

Inordinate amount of calls to my cell phone. No messages left.

won't leave voice mail and calling the number back immediately gets a busy signal.

Keeps calling my office phone, even when I answer, there's nobody there. Obviously a broken robo-call for who knows what.

Hang up calls from this number. I live in Australia! Why are they calling me?

Getting calls from this number as well. No voicemails, when trying to call back get a busy tone like others said.