Philip Seymour Hoffman's number was found to be on at least three different mobile phones taken from a lower Manhattan apartment, where his suspected dealer was busted.
This finding further shows how desperate the 'Capote' star had become as he lost his battle with addiction, the New York Post reported.
The four busted dealers have been charged with criminal possession of a controlled substance.
Cops raided the apartment where Hoffman was seen months ago by a witness who had bought drugs at the place.
However, it is still unclear if the suspected dealers sold Hoffman the drugs that he used when he died.