SpaceX's Starlink satellite network was back up and running on Friday as engineers hunted for the root cause of one of its biggest international outages the night before, a rare disruption for the powerful internet system set off by an internal software failure.

SpaceX's Starlink suffered one of its biggest international outages on Thursday when an internal  software failure knocked tens of thousands of users offline, a rare disruption for Elon Musk's powerful satellite internet system.

Starlink, owned by Elon Musk, has changed the game in terms of internet accessibility in rural and other underserved areas lacking high-speed broadband infrastructure. It has 2 million US subscribers, and more than 6 million globally.