Actually, its likely that Devin Nunes phone records were NOT obtained through that Schiff subpoena. All indications are that Nunes showed up in those records because he was placing or receiving calls to someone else whose records WERE obtained.
Yeah like Rudy Guiliani.
From the WSJ via Townhall:
Adam Schiffs 300-page House Intelligence impeachment report doesnt include much new about Mr. Trumps Ukrainian interventions. But it does disclose details of telephone calls between ranking Intelligence Republican Devin Nunes, Trump attorneys Rudy Giuliani and Jay Sekulow, reporter John Solomon, former Giuliani associate Lev Parnas, the White House, and others. The details are metadata about the numbers and length of the calls, not the content...Our sources says Mr. Schiff issued a subpoena in September to AT&T, demanding call logs for five numbersincluding Mr. Giulianis. Subsequent subpoenas to AT&T and Verizon demanded more details. Republicans were told of the subpoenas, yet under rules of committee secrecy couldnt raise public objections.
It's interesting that "five numbers" resulted in snaring Nunes, two of President Trump's lawyers, Giuliani's investigating partner, and reporter John Solomon.
-PJ