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.

19 hosts · 347 ms

HostCertsFirst seenLast seenDNS
capitaloneshopping.com 17 2025-08-08 2026-10-01 ok
*.capitaloneshopping.com 13 2026-04-17 2026-10-01 —
cdn2.capitaloneshopping.com 6 2026-05-07 2026-09-02 ok
r2.capitaloneshopping.com 9 2026-05-20 2026-09-15 ok
lb.capitaloneshopping.com 4 2025-08-08 2026-09-15 ok
c1-offers-prod.capitaloneshopping.com 4 2025-08-08 2026-09-15 nxdomain
shape-mobile.capitaloneshopping.com 3 2026-05-12 2026-09-25 ok
shape.capitaloneshopping.com 10 2025-08-08 2026-09-16 ok
site.capitaloneshopping.com 4 2025-08-08 2026-09-15 nxdomain
origin-site.capitaloneshopping.com 4 2025-08-08 2026-09-15 nxdomain
dmi.capitaloneshopping.com 1 2026-09-15 2026-09-15 ok
api.capitaloneshopping.com 4 2025-08-08 2026-09-15 ok
track.capitaloneshopping.com 13 2025-08-08 2026-09-24 ok
cdn.capitaloneshopping.com 4 2025-08-08 2026-09-15 ok
anir.capitaloneshopping.com 4 2026-04-17 2026-09-04 ok
empyr.capitaloneshopping.com 4 2025-08-08 2026-09-15 nxdomain
images.capitaloneshopping.com 4 2025-08-08 2026-09-15 ok
sms.capitaloneshopping.com 4 2025-08-08 2026-09-15 nxdomain
www.capitaloneshopping.com 4 2025-08-08 2026-09-15 ok

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