News Corporation said on Sunday that it had no record of being notified by the Justice Department nearly three years ago of a subpoena for the telephone records of a reporter at its Fox News cable channel.

The company’s chief legal counsel at the time also said that he had never seen material from the government related to the subpoena.

The Justice Department has signaled that it notified News Corporation on Aug. 27, 2010, that it had seized the phone records of a Fox News reporter — who turned out to be the Washington correspondent James Rosen — after one of his articles had included details of a secret United States report on North Korea.

The seizure was part of the department’s case against Stephen Jin-Woo Kim, a State Department contractor investigated in connection with the North Korea leak. Mr. Kim has pleaded not guilty to leaking information and is awaiting trial. Fox News has denied that it knew about the subpoena, while Justice Department officials have said they sent notification 90 days after obtaining the records.