The Pentagon’s UFO office keeps a running list of case numbers. In the spring of 2023, a sliver of that list reached the public, and it turned out to contain almost nothing but the numbers themselves.
The Request
John Greenewald runs The Black Vault, an archive of declassified U.S. government material built largely through the Freedom of Information Act (FOIA), the federal law that lets any member of the public request records held by executive-branch agencies. On December 6, 2022, Greenewald filed a FOIA request with the Pentagon seeking case information from the All-domain Anomaly Resolution Office (AARO), the office established to investigate and assess reports of unidentified aerial phenomena, generally shortened to UAP. The Pentagon’s reply arrived as a single document. Greenewald made its contents public on March 29, 2023: a list of 511 six-digit case serial numbers, each one credited to AARO.
What the List Actually Is
The document is exactly what it appears to be, no more. Five hundred and eleven numbers, six digits each, every one representing a case AARO has analyzed, is currently analyzing, or holds in storage. That is the full content. No date is attached to any entry. No location. No account of what was reported, by whom, or under what circumstances. Nothing distinguishes a case closed with an ordinary explanation from one still carrying an unidentified status. The 511 entries are not even sorted into categories. It reads less like a case file than like an index with every page it points to removed.
The Earlier Number
AARO’s own prior reporting offers a point of comparison. The government’s 2022 annual report on UAP, submitted to Congress on January 12, 2023, used a data cutoff of August 30, 2022, and reported a running total of 510 cases: 144 carried over from an earlier preliminary assessment, 247 reported new since then, and 119 more discovered or reported after that assessment’s own cutoff period had already closed. The index released to The Black Vault carries a later cutoff, December 6, 2022, the same date the FOIA request was filed. The two cutoffs sit just over three months apart. In that stretch, the total moved from 510 to 511. One additional case.
No Findings to Report
It matters that AARO has produced a different kind of document before. The 2022 annual report contains actual conclusions: its initial review of 366 newly identified cases characterized 26 as Unmanned Aircraft Systems, commonly called drones, or UAS-like objects; 163 as balloons or balloon-like; and 6 as sensor clutter, leaving 171 cases uncharacterized and marked for further analysis. AARO’s own historical summary states more broadly that the majority of its holdings have an ordinary explanation and that it has seen no evidence any case involves extraterrestrial technology. None of that appears in the 511-number list. There is no identification, no explanation, no percentage resolved, anywhere in it. It is not a trimmed-down version of those findings. It belongs to a different category of paperwork entirely: a ledger, not a report.
The Silence on the Gap
Why the total moved by exactly one between August 30 and December 6, 2022 is not addressed in either document. AARO does not state whether a single new report came in during that window, whether existing cases were merged or reclassified and happened to net out to one, or whether the two tallies were simply compiled under slightly different counting rules. Neither record explains the other. That is a gap in the paperwork, not evidence of anything in particular, and it is left exactly where the documents leave it.
The 511 Unknowns
It is easy to read 511 bare numbers as 511 mysteries. The record does not support that reading. Undisclosed is not the same as unidentified. Some of these case numbers almost certainly correspond to the balloons, drones, and clutter already sorted out in the 2022 report. Others may belong to the smaller group AARO flagged as unresolved and in need of further work. The index gives no way to tell which is which for any single entry. What is absent here is information AARO chose not to include in this particular release, not information AARO itself is missing.
The Black Vault’s Own Words
Greenewald has stated his next move plainly: file further FOIA requests, case number by case number, to try to obtain the dates, locations, and outcomes the index withholds. He has also described the release itself as “a small but positive step” toward transparency. Both statements are his own assessment, not AARO’s, and the second is a judgment rather than a documented fact. Whether the strategy pries loose case-level detail is a matter for the requests still ahead. For now the public record holds 511 numbers and nothing else attached to them, a cabinet with every drawer labeled and none of them open.