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.

19 hosts · 361 ms

HostCertsFirst seenLast seenDNS
otterpr.com 15 2026-04-19 2026-10-01 ok
*.otterpr.com 15 2026-04-19 2026-10-01 —
media.otterpr.com 9 2026-05-26 2026-09-22 ok
hub.otterpr.com 11 2026-06-03 2026-10-03 ok
store.otterpr.com 16 2026-05-24 2026-10-04 ok
swag.otterpr.com 10 2026-04-28 2026-08-25 ok
booking.otterpr.com 3 2026-05-28 2026-08-05 ok
ai.otterpr.com 6 2026-05-04 2026-08-30 ok
api.otterpr.com 5 2026-05-09 2026-09-21 ok
link.otterpr.com 5 2026-05-26 2026-09-23 ok
clerk.otterpr.com 14 2026-06-03 2026-09-29 ok
portal.otterpr.com 4 2026-06-04 2026-10-02 ok
video.otterpr.com 3 2025-09-29 2026-08-30 nodata
email.go.otterpr.com 3 2026-04-16 2026-06-15 ok
email.app.otterpr.com 5 2026-04-23 2026-08-21 ok
leads.otterpr.com 5 2026-05-09 2026-09-22 ok
email.leads.otterpr.com 5 2026-05-06 2026-09-03 ok
accounts.otterpr.com 9 2026-06-03 2026-09-30 ok
t.otterpr.com 5 2026-05-15 2026-09-12 ok

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