Derryn Hinch hopeful sex offenders will be banned from Asia

New independent Senator Derryn Hinch says sex offenders could be banned from heading to Asia for child sex tours within three months.

Senator Hinch said he had talked to Foreign Affairs Minister Julie Bishop about having passports of sexual offenders blocked "so they can't go off on these child rape sex tours in Asia".

"That's a big win because it wouldn't have been raised otherwise," he told Neil Mitchell this morning on Melbourne radio 3AW.

Senator Hinch previously said he wanted to strip convicted sex offenders of their passports.

"100,000 convicted sex offenders on the register ... the private register, go to Indonesia every year," he told ABC News last month.

"They're not going there for the sun, they're going there for the sons and the daughters.”

Senator Hinch was elected to the senate this year after vowing to push for a national public register of convicted sex offenders.