DraftKings has filed a law suit in Massachusetts federal court seeking to unmask and punish the parties linked to 10 IP addresses that they say carried out a cyberattack on the website, resulting in a 26-minute denial of service.

The popular Boston-based website, which said it has paid over $5 billion in contest awards in its history and took in $150 million in entry fees in April alone, claims it was attacked twice in early August by the unidentified cyber assailants.

The IP addresses of those involved in the attack were traced back to several service providers. DraftKings says the court order will allow them to subpoena those providers.

The attack came days after DraftKings launched a sports betting operation in New Jersey and a month before the start of the NFL season. But the company says there is no indication it was linked to either event.

Chief Legal Officer R. Stanton Dodge of DraftKings says no confidential customer or company information was stolen.