The phone records the committee has obtained are part of a new round of call information called in from communications companies, several sources tell CNN. These records provide the sample logs that show incoming and outgoing calls, including the date, time, and duration of calls. The records also show a log of text messages, but not the content or contents of the messages.
Still, the information could be a critical investigative tool for the committee to put together a roadmap of who communicated before, during and after January 6th.
Both Eric Trump and Guilfoyle played prominent roles in Trump's "Stop the Steal" effort, including Guilfoyle's collection of the lie that the election was stolen. Both spoke at the January 6 meeting on Ellipse, which preceded the attack on the Capitol.
The records can also help the committee elaborate on the text messages and phone records it has received from others, such as former White House Chief of Staff Mark Meadows, as well as fundraisers and convention organizers.
The recently obtained records include the cell phone number used by Eric Trump, according to sources familiar with the number. The mobile number of Guilfoyle was confirmed by sources who know her number and her text messages. The committee has previously identified this number as Guilfoyle's number in text message exchanges with other witnesses.
There is no indication that the committee has directly convened either Eric Trump or Guilfoyle for interviews or documents. There is also no evidence that the committee has sued communications journals related to Trump's other children, Ivanka Trump or Donald Trump Jr., or his son-in-law Jared Kushner.
The committee released text messages that Donald Trump Jr. sent to Meadows as the January 6 attack was unfolding, which Meadows voluntarily gave to the committee before stopping cooperating.
Reached by CNN on Tuesday afternoon, the committee declined to comment on the new Trump and Guilfoyle subpoenas.
But in an interview with CNN's Don Lemon Monday night, committee member Zoe Lofgren, a California Democrat, said, "We gather information from the president's inner circle and others who were able to see and hear what the plot was.
Lofgren declined to say whether the committee had received information from the Trump family, adding, "nothing is off the table."
According to a source familiar with Eric Trump's thinking about the subpoena of his call logs, "he does not lose sleep over it."
An attorney for Guilfoyle said she had not been notified that any subpoena had been issued for her files. The lawyer, Joseph Tacopina, said the lawsuit has "no significance to her because she has absolutely nothing to hide or worry about."
Trump, Guilfoyle plays in 'Stop the Steal'
The committee is interested in Eric Trump because of his involvement in the events of Jan. 6, including efforts in "Stop the Steal," according to a source familiar with the investigation. Eric Trump spoke at the January 6 meeting at Ellipse, quoting his father's tweet calling the protesters "patriots" and questioning the legitimacy of President Joe Biden's victory.
"I have a question for you. Does anyone here actually think Joe Biden won this election?" asked Eric Trump at the meeting. "I do not either, boys, neither do I."
Guilfoyle, who was involved in raising money for the Trump campaign and the January 6 demonstration, also spoke at Ellipse. "Look at all of us out here, god-loving, freedom-loving, freedom-loving patriots who will not let them steal this election," Guilfoyle said. "We will not allow the Liberals and Democrats to steal our dream or steal our election."
Guilfoyle's lawyer denied to ProPublica that the texts were related to the January 6 meeting or that Guilfoyle was involved in fundraising or approving speakers.
The batch of texts released by the committee last month included an exchange between Donald Trump Jr. and Meadows, while the January 6 attack unfolded. Trump Jr. wrote to Meadows: "He has to condemn this shit ASAP. Capitol Police tweet is not enough."
"I'm pushing hard. I agree," Meadows replied.
The contents of these texts were revealed in December by the Wyoming Rep. Liz Cheney, the panel's top Republican, during Parliament's vote to keep Meadows in contempt. Cheney said Trump Jr. sent a text message "over and over again", including texting Meadows: "We need an Oval office address. He needs to look now. It's gone too far and is out of control."
Clarification: This story has been updated to clarify the committee's interest in Kimberly Guilfoyle and Eric Trump.
CNN's Kara Scannell and Christie Johnson contributed to this report..