issued.live is open to the public today. This note is about how it is built and why it behaves the way it does, because those choices are the difference between a lookup you can rely on and one that quietly guesses.
Where the corpus stands
At launch the index holds 334 million domains and ingested roughly 15.9 million certificates in the preceding twenty-four hours, reading 56 of the 58 known Certificate Transparency logs. Ingest sustains tens of thousands of entries per second. Every domain's DNS is re-scanned on a rolling cycle so a record reflects a confirmed observation rather than a lookup performed while you wait.
Observational, not authoritative
The most important design decision here is what this service refuses to do.
