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 · 328 ms

HostCertsFirst seenLast seenDNS
shopmyexchange.com 5 2025-10-10 2026-09-18 ok
*.shopmyexchange.com 4 2025-10-10 2026-09-16 —
media.shopmyexchange.com 5 2026-02-06 2026-04-13 ok
weeklyad.shopmyexchange.com 4 2026-04-09 2026-08-13 ok
*.e.shopmyexchange.com 1 2026-01-10 2026-01-10 —
mi.shopmyexchange.com 2 2026-04-09 2026-09-09 ok
link.email.shopmyexchange.com 2 2025-08-01 2026-06-23 ok
giftcards.shopmyexchange.com 1 2026-02-11 2026-02-11 ok
www.giftcards.shopmyexchange.com 1 2026-02-11 2026-02-11 ok
comms.shopmyexchange.com 18 2026-04-28 2026-08-25 ok
giftcards-uat.shopmyexchange.com 1 2026-02-11 2026-02-11 ok
www.giftcards-uat.shopmyexchange.com 1 2026-02-11 2026-02-11 ok
dev-notus-test.shopmyexchange.com 2 2026-05-18 2026-07-13 ok
preview.shopmyexchange.com 4 2026-04-14 2026-08-12 ok

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