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.

15 hosts · 261 ms

HostCertsFirst seenLast seenDNS
paperlesspost.com 5 2026-05-26 2026-09-23 ok
*.paperlesspost.com 7 2026-01-02 2026-09-23 —
*.ptp1.paperlesspost.com 5 2026-05-28 2026-09-25 —
*.ptp2.paperlesspost.com 5 2026-05-28 2026-09-25 —
*.ptp3.paperlesspost.com 5 2026-05-28 2026-09-25 —
zelda.paperlesspost.com 5 2026-06-03 2026-10-01 ok
*.stg.paperlesspost.com 5 2026-05-28 2026-09-25 —
link.paperlesspost.com 5 2026-05-08 2026-09-05 ok
*.txl.paperlesspost.com 5 2026-05-28 2026-09-25 —
*.production.paperlesspost.com 1 2026-01-02 2026-01-02 —
partyshop.paperlesspost.com 17 2026-05-22 2026-10-01 ok
www.partyshop.paperlesspost.com 17 2026-04-11 2026-09-23 ok
webinar.paperlesspost.com 30 2026-04-24 2026-09-22 ok
*.slinks.paperlesspost.com 5 2026-05-16 2026-09-13 —
status.paperlesspost.com 5 2026-05-25 2026-09-21 ok

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