The Fastest Way to Query
1.5 Billion NIST Hashes
Check your files against 1.5 billion+ trusted NIST NSRL hashes — faster than any other service, from a global cloud edge. Single lookups in milliseconds, bulk jobs up to 100,000 hashes.
The dataset
Backed by NIST NSRL — 1.5 billion known files
The National Software Reference Library is the U.S. government’s authoritative catalog of known files — software that has been cataloged, analyzed, and published in the Reference Data Set. Over 1.5 billion file records from thousands of publishers. A match tells you the file is known, so you can set it aside and focus on what isn’t.
1.5B+ file records · maintained by NIST · updated quarterly
Sample output
Known or unknown, instantly
Hash type is detected automatically. A Found result means the file is cataloged in NIST NSRL; Not Found means it isn’t — and may warrant further review. “Known” means cataloged, not a safe/clean verdict.
| Hash | Type | Source | Status | Details |
|---|---|---|---|---|
| d41d8cd98f00b204e9800998ecf8427e | MD5 | NSRL | ✓ Found | Known Windows system file |
| da39a3ee5e6b4b0d3255bfef95601890afd80709 | SHA-1 | NSRL | ✓ Found | Recognized software component |
| e3b0c44298fc1c149afbf4c8996fb924… | SHA-256 | NSRL | ? Not Found | Not in NSRL — warrants further review |
Why bulk matters
One-at-a-time is too slow for real work
Seconds, not hours
Submit multiple hashes of different types in a single API call. Incident response timelines can’t wait for copy-paste loops.
Filter the known at scale
Cross-reference entire disk images, memory dumps, or EDR artefact lists in one operation — drop the cataloged files and shrink the haystack.
Plugs into your workflow
Pipe results into your SIEM, SOAR, or case management tool via the REST API. No manual copy-paste.
Start checking hashes in seconds
2,500 free lookups / month. No credit card needed.