Received call from this number and did not answer; caller ID showed unidentified caller with the above number.  Recorded message was left to the effect that "We have been trying to reach you. This is a final message from the IRS. We fill file a lawsuit against you if you do not call us immediately..."   I cut off the recorder before the message was completed.  Reverse lookup did not have any information, except that 725 is a Las Vegas area code. When I dialed the number, a recording said that the number could not be completed as dialed.