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.

20 hosts · 339 ms

HostCertsFirst seenLast seenDNS
stockx.com 35 2026-03-30 2026-09-20 ok
*.stockx.com 35 2026-03-30 2026-09-20 —
rbidsna5.stockx.com 4 2026-05-12 2026-07-09 nxdomain
powersellerblog.stockx.com 8 2026-04-20 2026-08-16 ok
sli.stockx.com 2 2026-04-13 2026-09-13 ok
*.api.stockx.com 9 2026-05-16 2026-09-11 —
feedback.stockx.com 4 2026-05-19 2026-07-28 ok
*.email.stockx.com 9 2026-05-16 2026-09-11 —
link.email.stockx.com 2 2026-03-02 2026-07-18 ok
securemail.stockx.com 1 2025-11-06 2025-11-06 ok
*.tmail.stockx.com 9 2026-05-16 2026-09-11 —
api.cdp.stockx.com 3 2026-04-23 2026-09-23 ok
evs.cdp.stockx.com 3 2026-04-22 2026-09-22 ok
refer.stockx.com 3 2025-08-07 2026-09-02 ok
powerseller.stockx.com 10 2026-04-20 2026-08-16 ok
links.stockx.com 2 2026-03-02 2026-07-18 ok
sms.stockx.com 2 2026-03-19 2026-08-19 ok
videos.stockx.com 10 2026-04-13 2026-08-09 ok
careers.stockx.com 8 2026-04-15 2026-08-11 ok
sv.stockx.com 6 2026-07-28 2026-09-03 ok

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