The spreadsheet, distributed online a day or two ago, uncovered names, email locations, telephone numbers and passwords. Those recorded incorporate individuals from the marine corps, Nasa, the state division, flying corps and FBI.
Supporters of Isis on Twitter seized on the rupture, posting individual points of interest of troopers and government staff members and urging solitary wolves to "act and slaughter".
A man guaranteeing to represent the gathering told the Watchman the data was gotten from military and government databases, a case on which US armed force authorities tossed uncertainty.
"This is the second or third time they've asserted that and the initial two times I'll let you know, whatever rundowns they got were not taken by any digital assault," the armed force head of staff, Gen Beam Odierno, said on Wednesday.
"This is the same than the other two," he said, alluding to prior purported hacks by Isis supporters in January and May.
"Be that as it may, I consider it important in light of the fact that it's reasonable what they're attempting to do … despite the fact that I trust they have not been fruitful with their arrangement," he said.
The Pentagon said it was all the while investigating the episode.
"We don't generally have much [information] in light of the fact that the vast majority of the email locations give off an impression of being truly old and passwords recorded in the tweet don't match up with our secret word quality necessities," marine Lt Col Jeffrey Pool said.
The English national has been connected to the shooters who assaulted a Prophet Muhammad (PBUH) attracting challenge Texas in May.
Just the Isis pioneer, Abu Bakr al-Baghdadi, and its most conspicuous killer, Mohammed Emwazi, are higher on the CIA list.
Additionally recorded were no less than eight Australians, including an individual from the Victorian parliament and individuals from the Australian barrier strengths.