Telstra will shut down more than 160 contentious mobile infrastructure sites after the competition watchdog raised concerns the sites were registered to disrupt and prevent the rollout of 5G services by rival telco Optus.

The sites affected are in both metropolitan and rural areas, and Telstra has accepted an enforceable undertaking to deregister them months after The Australian Financial Review reported that Optus had complained to the Australian Competition and Consumer Commission (ACCC) about the sites.