Find every subdomain
of a domain.

Every hostname under a domain that ever appeared in a public TLS certificate — with certificate counts, first/last seen and live DNS status.

14 hosts · 281 ms

HostCertsFirst seenLast seenDNS
gridandpixel.com 41 2026-04-26 2026-09-23 ok
*.gridandpixel.com 40 2025-11-26 2026-09-23 —
*.staging.gridandpixel.com 22 2025-11-26 2026-09-25 —
blog.gridandpixel.com 3 2026-05-16 2026-09-17 ok
www.blog.gridandpixel.com 3 2026-05-16 2026-09-17 ok
help.gridandpixel.com 10 2026-04-12 2026-08-14 ok
metrics.gridandpixel.com 4 2026-06-01 2026-09-18 ok
hooks.gridandpixel.com 2 2026-08-20 2026-08-20 ok
*.hooks.gridandpixel.com 2 2026-08-20 2026-08-20 —
*.test.gridandpixel.com 1 2025-11-26 2025-11-26 —
inst.gridandpixel.com 4 2026-04-15 2026-08-17 ok
*.dev.gridandpixel.com 22 2025-11-26 2026-09-26 —
metrics-preview.gridandpixel.com 5 2026-06-01 2026-09-17 ok
pay.gridandpixel.com 7 2026-07-28 2026-09-25 ok

Programmatic access, with DNS A records: API GET /v1/hosts/gridandpixel.com (API key for paging).

Shown here: hostnames with a certificate that is valid now or expired within the last 90 days. The full history since 2013 — hostnames whose last certificate expired earlier — is a Pro plan method: GET /v1/hosts-history/gridandpixel.com.