Observed arrival · 2026-09-07

CRT.Live

crt.live Observed source

Editorial interest 82/100 Selection signal · not a rating of the site

An open certificate-transparency search tool for finding hostnames associated with a domain.

Landing page captured for the 2026-09-07 issue.

Field notes

CRT.Live deduplicates hostname observations: a name appears once even when it occurs on multiple certificates. Its text endpoint streams newline-delimited results, which the page says can handle domains ranging from a few names to a hundred thousand subdomains. The homepage also exposes a live observation feed, with examples including device, commerce, and ChatGPT-related hostnames, and says those names refresh every five seconds.

Observed signals

Read the marks

Editorial observations of this landing page, not a rating.

○OpenPublic substance visible

✦PrettyNotable craft visible

●ProPolished or operationally mature

◎NicheUnusually specific use

One card from the complete issue

A Record Press With a 0.4 mm Nozzle

278,515 arrived 1,000 judged 997 catalogued Enter the complete issue