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 · 304 ms

HostCertsFirst seenLast seenDNS
ollies.us 15 2026-01-26 2026-09-26 ok
*.ollies.us 19 2026-01-26 2026-09-30 —
obo-vpn01.ollies.us 1 2026-09-02 2026-09-02 ok
www.obo-vpn01.ollies.us 1 2026-09-02 2026-09-02 nxdomain
cms112.ollies.us 16 2026-04-30 2026-09-28 ok
api.ollies.us 3 2025-08-04 2026-08-24 ok
www.api.ollies.us 3 2025-08-04 2026-08-24 nxdomain
link.ollies.us 16 2026-06-06 2026-10-02 ok
portal.ollies.us 1 2026-07-23 2026-07-23 nxdomain
mail.ollies.us 5 2026-03-12 2026-06-25 ok
fortivpn.ollies.us 1 2025-10-20 2025-10-20 ok
flyers.ollies.us 5 2026-05-09 2026-09-08 ok
investors.ollies.us 5 2026-05-09 2026-09-26 ok
www.ollies.us 10 2026-04-29 2026-09-26 ok

Programmatic access, with DNS A records: API GET /v1/hosts/ollies.us (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/ollies.us.