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.

22 hosts · 308 ms

HostCertsFirst seenLast seen
mbde-l-exch01.martin-baker.co.uk 1 2025-10-06 2025-10-06
MBJ-ASAFW1.martin-baker.co.uk 1 2026-04-17 2026-04-17
sbajd1.martin-baker.co.uk 3 2025-10-06 2026-04-10
sbcjd1.martin-baker.co.uk 1 2026-04-10 2026-04-10
sbade1.martin-baker.co.uk 3 2025-09-25 2026-09-22
sbcde1.martin-baker.co.uk 1 2026-04-10 2026-04-10
sbach1.martin-baker.co.uk 3 2025-08-08 2026-08-18
sbcch1.martin-baker.co.uk 1 2026-04-10 2026-04-10
mbaccess1.martin-baker.co.uk 1 2026-01-09 2026-01-09
mbde-l-exch02.martin-baker.co.uk 1 2025-10-06 2025-10-06
mbch-l-exch02.martin-baker.co.uk 1 2025-10-06 2025-10-06
mbazpa2.martin-baker.co.uk 1 2026-05-05 2026-05-05
coll2.martin-baker.co.uk 3 2026-04-10 2026-05-14
mbde-l-coll2.martin-baker.co.uk 1 2026-05-14 2026-05-14
MBJ-ASAFW3.martin-baker.co.uk 1 2026-04-17 2026-04-17
mbde-l-exchse.martin-baker.co.uk 1 2025-10-06 2025-10-06
mbch-l-exchse.martin-baker.co.uk 1 2025-10-06 2025-10-06
Outlook.martin-baker.co.uk 1 2025-10-06 2025-10-06
webmail.martin-baker.co.uk 1 2025-10-06 2025-10-06
usvpn.martin-baker.co.uk 1 2026-04-17 2026-04-17
AutoDiscover.martin-baker.co.uk 1 2025-10-06 2025-10-06
mta-sts.martin-baker.co.uk 2 2025-09-17 2026-08-18

Programmatic access: API GET /v1/hosts/martin-baker.co.uk (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/martin-baker.co.uk.