The Justice Department informed the Times late last week that it had served third-party telecommunications providers with subpoenas seeking call and messaging records. Those demands were separate from subpoenas issued July 10 that sought to compel reporters to testify before a federal grand jury. Two subpoenas sought records dating to January 1, several months before the articles at the center of the investigation were published. The Times said records were sought for two reporters’ spouses and the mother of another journalist. The White House referred questions to the Justice Department, which had not publicly responded to the newspaper’s allegations.