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.

11 hosts · 301 ms

HostCertsFirst seenLast seenDNS
kotapay.com 17 2026-02-20 2026-09-21 ok
*.kotapay.com 14 2026-05-05 2026-09-21 —
static.kotapay.com 2 2026-02-20 2026-02-20 ok
auth.kotapay.com 10 2026-05-01 2026-08-28 ok
staging-auth.kotapay.com 6 2026-08-04 2026-10-03 ok
api.kotapay.com 2 2025-08-13 2026-07-21 ok
staging.api.kotapay.com 1 2025-11-06 2025-11-06 ok
autodiscover.kotapay.com 3 2025-12-16 2025-12-22 ok
kavinu.kotapay.com 1 2026-01-16 2026-01-16 ok
staging.kavinu.kotapay.com 2 2025-07-31 2026-07-17 ok
www.kotapay.com 2 2026-02-20 2026-02-20 ok

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