What it reads
Past hostnames from public certificate logs.
Check 41 of 54 · Domain and registration
Naming history, explained.
How you tend to name your systems, as context.
Engine 1.57.0, read 25 October 2026
Customer scanContextReliability: Indicative
Could you lose the domain, or part of it?
What the check does, and where it stops.
Why it matters
Naming habits tell an attacker where to look next. Knowing yours tells you what they can guess.
What it shows
It is context: background only. It is never graded, so nothing it finds lowers your score.
Where its limits are
Description, not a verdict.
ReliabilityIndicative: a pointer, not a verdict
It starts from public certificate logs, a shared source with a strict limit, so it runs on a customer's own verified domains, not on the free check.
Check 41 is one of 10 in Domain and registration. See it in its row on the scanner page, beside the rest of Domain and registration.
See how your domain does.
This check runs on a customer's own verified domains. The free check runs over 40 checks in about 30 seconds, with no account.