Find every subdomain
of a domain.

Every hostname under a domain that ever appeared in a public TLS certificate — with certificate counts and first/last seen dates.

19 hosts · 152 ms

HostCertsFirst seenLast seen
m2.emails.virginatlantic.com 2 2025-08-10 2026-07-11
res2.emails.virginatlantic.com 2 2025-08-10 2026-07-11
t2.emails.virginatlantic.com 2 2025-08-10 2026-07-11
m4.emails.virginatlantic.com 2 2025-08-10 2026-07-11
res4.emails.virginatlantic.com 2 2025-08-09 2026-07-10
t4.emails.virginatlantic.com 2 2025-08-10 2026-07-11
m5.emails.virginatlantic.com 5 2025-08-10 2026-09-19
res5.emails.virginatlantic.com 3 2025-10-19 2026-09-19
t5.emails.virginatlantic.com 4 2025-08-10 2026-09-19
m6.emails.virginatlantic.com 2 2025-08-10 2026-07-11
res6.emails.virginatlantic.com 2 2025-08-09 2026-07-10
t6.emails.virginatlantic.com 2 2025-08-10 2026-07-11
m7.emails.virginatlantic.com 2 2025-08-10 2026-07-11
res7.emails.virginatlantic.com 2 2025-08-09 2026-07-10
t7.emails.virginatlantic.com 2 2025-08-10 2026-07-11
web.emails.virginatlantic.com 4 2025-08-10 2026-07-11
m.emails.virginatlantic.com 4 2025-08-07 2026-07-11
res.emails.virginatlantic.com 4 2025-08-07 2026-07-11
t.emails.virginatlantic.com 4 2025-08-07 2026-07-11

Programmatic access: API GET /v1/hosts/emails.virginatlantic.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/emails.virginatlantic.com.