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.

7 hosts · 324 ms

HostCertsFirst seenLast seenDNS
marksandspencerlondon.com 2 2025-08-09 2026-07-26 nodata
cloud.service.marksandspencerlondon.com 2 2026-01-25 2026-01-26 ok
image.service.marksandspencerlondon.com 3 2026-01-22 2026-08-31 ok
click.service.marksandspencerlondon.com 2 2026-01-25 2026-01-26 ok
view.service.marksandspencerlondon.com 1 2026-01-25 2026-01-25 ok
smetrics.marksandspencerlondon.com 2 2025-10-13 2025-10-13 ok
www.marksandspencerlondon.com 2 2025-08-09 2026-07-26 ok

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