The "Stop the Steal" rally organizer says the January 6 panel subpoenaed Verizon for his phone records.
Ali Alexander's attorneys filed a complaint, arguing the request does not pertain to the committee's investigation.
The complaint says Alexander gave the committee his communications with GOP lawmakers.
"Stop the Steal" organizer Ali Alexander provided the House committee investigating the Capitol insurrection with his communications involving several Republican lawmakers leading up to January 6, according to a complaint filed by his attorneys Friday.
Alexander told the committee he had multiple phone conversations with Rep. Paul Gosar, potentially exchanged a text message with Rep. Mo Brooks, and spoke in person with Rep. Andy Biggs prior to the Capitol riot, the complaint said.
The complaint was filed in an attempt to block the January 6 committee from obtaining Alexander's phone records. According to the filing, the committee sent a subpoena to Verizon for information associated with Alexander's personal cell phone number, including IP addresses, a list of contacts, and call session times from November 1, 2020, through January 31, 2021.
His attorneys argued that the committee is only probing Alexander because of his political beliefs and the data sought is not pertinent to its investigation.
The complaint said Alexander disclosed his communications with GOP lawmakers to the committee in addition to providing testimony on December 9.
During the testimony, Alexander told the panel he held an organizing call in January where members of Congress "might have been present," although he could not recall who was in attendance because the call was so large, according to the complaint.
In a since-deleted video first posted in January, Alexander said that he collaborated with Gosar, Biggs, and Brooks on the "January 6 idea."
Representatives for Gosar, Biggs, Brooks, and Alexander did not immediately respond to Insider's request for comment. The three lawmakers were among the Republicans involved in attempts to stop the certification of the election results.
In response to inquiries from ABC News, Brooks released what he said was a text from December 2020 where Alexander introduced himself and called January 6 "a big moment for our republic." Brooks told ABC he did not recognize the number at the time.
"The insinuation that this single text to Congressman Brooks from an unknown number by someone claiming to be 'Ali Alexander' somehow suggests Congressman Brooks in any way helped plan the Capitol attack is absurd, outrageous and defamatory," Brooks wrote in a statement to ABC.