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.

16 hosts · 255 ms

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HostCertsFirst seenLast seen
nlc.ca 3 2026-04-17 2026-09-12
link.nlc.ca 5 2026-05-30 2026-09-27
mail.nlc.ca 3 2026-02-22 2026-10-15
www.mail.nlc.ca 3 2026-02-22 2026-10-15
webmail.nlc.ca 3 2026-02-22 2026-10-15
firewall.nlc.ca 3 2025-11-27 2026-10-15
vpn.nlc.ca 4 2025-11-27 2026-10-15
www.vpn.nlc.ca 3 2025-11-27 2026-10-15
supplypro.nlc.ca 2 2026-10-13 2026-10-15
www.supplypro.nlc.ca 1 2026-10-13 2026-10-13
lumber.nlc.ca 4 2026-06-17 2026-10-15
autodiscover.nlc.ca 3 2026-02-22 2026-10-15
homes.nlc.ca 4 2026-06-17 2026-10-15
supplypro-dev.nlc.ca 1 2026-10-13 2026-10-13
www.nlc.ca 4 2026-06-18 2026-10-16
legacy.nlc.ca 3 2026-02-22 2026-10-15

Programmatic access: API GET /v1/hosts/nlc.ca (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/nlc.ca.