Sydney Harbour Bridge is changed in ownership and tourists may not climb the Bridge in this life.

Government's Road Maritime Service on Friday announced the termination of its contract with Sydney Harbour Bridge after a 20-year stand-alone operation of high-margin travel services.

BridgeClimb first launched the tour in October 1998 and has attracted more than 4 million climbers.

Passengers scheduled for September 30 are advised to be taken over by Hammon, but the news remains to be confirmed.

It is reported that Hammon is also operating Blue Mountain tourism projects.

"passengers scheduled for September 30 will be contacted by BridgeClimb," BridgeClimb said.