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.

10 hosts · 350 ms

HostCertsFirst seenLast seenDNS
longitudeswim.com 16 2026-04-07 2026-10-01 ok
cloudflare-verify.rb.longitudeswim.com 10 2026-04-18 2026-09-12 nodata
*.cloudflare-verify.rb.longitudeswim.com 10 2026-04-18 2026-09-12 —
i.longitudeswim.com 3 2026-05-22 2026-09-08 ok
link.longitudeswim.com 16 2026-04-07 2026-10-02 ok
shop.longitudeswim.com 14 2026-04-19 2026-08-17 ok
swimwear.longitudeswim.com 14 2026-04-21 2026-08-18 ok
www.longitudeswim.com 20 2026-04-07 2026-10-01 ok
cloudflare-verify.www.longitudeswim.com 10 2026-05-10 2026-09-06 nodata
*.cloudflare-verify.www.longitudeswim.com 10 2026-05-10 2026-09-06 —

Programmatic access, with DNS A records: API GET /v1/hosts/longitudeswim.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/longitudeswim.com.