Claiming to be IRS said Warrant maybe issued. The IRS first contacts thru registered mail unless some law has been changed. Sounds like Scammer to me. Does say his name is Jack O conner.
my wife received the same call. We were told that if she didn't pay $1,000 immediately that they would arrest her within the hour. We almost fell for it, until I researched the number. The man said his name was J. Hoffman.
I also received a message from thus number stating he was IRS. He said his name was Jason O'Connor. He had an accent and I barely understood his message.