Washington (CNN) At the request of CNN, a federal judge in Washington on Monday released about 230 pages of data from the court showing new details about the scope and speed of Robert Mueller's investigation.

The pages largely show limited new details about Mueller's work, such as the redacted case names and dates for his 499 search warrants and 200 communications data requests. Mueller began getting permission for searches in early July 2017, not even two months following his appointment as special counsel, the documents show.

His office did the bulk of its searches throughout 2018, conducting only a few searches this year, when the investigation was wrapping up.

Ultimately, Mueller was asking the court for access to thousands of devices and records in a grand jury investigation, according to the documents released by DC District Court Chief Judge Beryl Howell. The documents now may act as a rough road map of how Mueller conducted his investigation.

Almost all of the hundreds of search and seizure cases revealed Monday are still under seal. Yet the lists still confirm that Mueller and the FBI gave extensive information about the special counsel's work to the court system -- and particularly to Howell. Names and addresses are either redacted or not used throughout the lists -- with redactions made because of ongoing investigations, the Justice Department said.

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