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 · 331 ms

HostCertsFirst seenLast seen
matelso.com 7 2026-05-09 2026-09-06
*.matelso.com 2 2026-06-03 2026-06-03
solutionno1.matelso.com 10 2026-04-22 2026-08-20
staging2.matelso.com 5 2026-05-10 2026-09-06
ai.matelso.com 4 2026-04-18 2026-08-16
*.ai.matelso.com 4 2026-04-18 2026-08-16
helpdesk.matelso.com 5 2026-05-20 2026-09-17
customerportal.matelso.com 5 2026-04-27 2026-08-25
om.matelso.com 7 2026-06-03 2026-10-01
*.om.matelso.com 7 2026-06-03 2026-10-01
platform.matelso.com 5 2026-05-12 2026-09-09
*.platform.matelso.com 5 2026-05-12 2026-09-09
dmexco.matelso.com 5 2026-05-06 2026-09-03
lp.matelso.com 10 2026-04-23 2026-08-19
calendar.matelso.com 5 2026-05-20 2026-09-17
salesqualitybooster.matelso.com 12 2026-04-23 2026-08-19
mails.matelso.com 12 2026-04-22 2026-08-19
int.matelso.com 3 2026-06-11 2026-08-10
*.int.matelso.com 3 2026-06-11 2026-08-10
dev.matelso.com 6 2026-06-01 2026-09-29
*.dev.matelso.com 6 2026-06-01 2026-09-29
www.matelso.com 5 2026-05-09 2026-09-06

Programmatic access: API GET /v1/hosts/matelso.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/matelso.com.