One hour. One number.
Open to everyone.
A random integer from 0 through 999,999,999, inclusive, every hour.
Independently sourced. Publicly recorded. Yours to verify.
Sourced from the public drand network.
Check the source, calculation and record.
Published hourly. Officially on UTC.
A future random number for a future hour
Choose a future UTC hour in advance for your draw, experiment or shared challenge. Every hour has one public random number, shared by everyone. The random number for a future hour cannot be calculated in advance from our history: it depends on drand randomness that becomes available at that hour.
When that hour arrives and its source is available, check the published hourly number and verify its evidence. Explore random number use cases or read how hourly randomness works.
A record of every hour
Explore history →Randomness beyond us.
A predetermined drand round provides independent, cryptographically signed randomness.
One transparent calculation.
An open, versioned formula converts the source into a number within the published range.
Trust you can check.
Inspect the original source and reproduce the result, right in your browser.