June 30, 2016 3:30 PM EDT

A whopping 6.7 million U.S. viewers tuned in for the fourth season premiere of Netflix’s Orange Is The New Black within its first few days streaming online, Nielsen revealed Wednesday. And viewers quickly returned for more — 5.9 million watched the season’s second episode from June 17, when the season began streaming on Netflix, to June 19.

Netflix—along with subscription video services such as Hulu and Amazon—doesn’t report its ratings, though Nielsen started tracking OITNB’s viewership last year with permission from the series’ producer, Lions Gate, the Wall Street Journal reports. The information and measurement company revealed its viewer findings at a conference in Las Vegas, among other shows Nielsen partnered with to track ratings.

OITNB‘s ratings show it was hard competition for some of the most-watched cable programs during the same time period, including HBO’s Game of Thrones (which garnered 10.4 million viewers for its June 19 episode) and TNT’s Major Crimes, which received 5.8 million viewers for its June 13 season premiere.

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