My friend got a call from (210) 981-1071, the caller identified himself as an IRS Agent and threatened legal action and to have my friend arrested if she didn't make a payment of $5680.28, reference delinquent back taxes for the last four years. My friend called me due to me being in law enforcement. I called him back with the case number he had provided and my friends name, posing as my friends accountant. He again advised he was an IRS Agent named Alan, ID # W7348. I pressed him for a number to verify he was truly an IRS Agent. He would not provide one. I eventually gave him my real name and work number. He actually called me at the police department to verify I was a law enforcement officer. He called me back from (630)-493-5291 which showed on the caller id as a government number. Alan then admitted it was a scam an tried to get me to pay him money for information on other scam artists in the United States, advising he was from Bangladesh. I goggled the (630) 493-5291 and it came back to a library in Illinois to assist foreigners with IRS questions. I don't know how they are manipulating the phone numbers but FYI...the IRS will not CALL YOU on the telephone advising you owe them money. Anyone doing this is a scam artist. Also all the callers I talked to had a middle eastern accent.