The retrieval of details of tens, possibly hundreds, of thousands of Australians from a shutdown black market website linked to the death of a Perth teenager has been described as a "huge win" by the boy's father.

Rod Bridge, whose son Preston died early this year after taking a substance given to him and believed to have been purchased from the Silk Road website, welcomed the site's closure.

Preston Bridge died in hospital after falling from a Perth resort balcony.

"It's the only way that teenagers or anyone can purchase these drugs and to stop the site is a huge win. I never thought it was going to happen," Mr Bridge told Perth Radio 6PR.