Don't bother unless your sole purpose is to waste their time to prevent them from scamming someone else. The IRS and a large number of news media outlets have released a lot of reports on this very pervasive scam being run from foreign countries.
received a call CID recorded this number. Also received another call from 208 318-5502. On the latter, first there was silence, then some old woman (over a lot of background noise) mumbled something like "...Internal revenue will file action...(fade away)". This is bu**sh*t people. Just last night on the 11:00 news, they warned people about some telephone scam invoking the name of the Internal Revenue, and it's a fact that the Internal Revenue doesn't (hardly ever) call anyone, or give advance warning of any "action". Every thing the Internal Revenue does they do IN Writing. Glad I watched the 11:00 news, and I sure am sick and tired of these bu**sh*t scams. 3 so far today, and it"s only 3:00 P.M.! Hope everyone finds this information helpful.