Global One (G1)— If you’ve stayed at a Marriott hotel since 2014 — you could be one of 500 million customers affected by a Nov. 30 data breach.

The company discovered a hacker had access to the company’s Starwood network since 2014.

They said the affected database has records of up to 500 million customers — and 327 million of them had “some combination” of their name, address, passport number and more revealed.

The breach which included credit card information as well, is reportedly one of the biggest on record — only Yahoo’s 2013 breach of three billion is larger.

Because the information included reservations for future stays, including home addresses, one legal analyst said burglars could learn when a guest wasn’t at home.

Meanwhile, customers in Oregon and Maryland have filed lawsuits against the hotel chain, and more are reportedly expected in the coming months.