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.

17 hosts · 276 ms

HostCertsFirst seenLast seenDNS
nicmanager.com 13 2025-10-23 2026-09-12 ok
*.nicmanager.com 13 2025-10-23 2026-09-12 —
whoisapi.nicmanager.com 5 2026-04-13 2026-08-12 ok
cdn.nicmanager.com 9 2026-04-30 2026-08-22 ok
brandprotection.nicmanager.com 5 2026-05-26 2026-09-24 ok
portal.brandprotection.nicmanager.com 1 2026-02-16 2026-02-16 ok
cdn.brandprotection.nicmanager.com 5 2026-05-27 2026-09-24 ok
lp.nicmanager.com 3 2026-06-21 2026-09-05 ok
help.nicmanager.com 6 2026-07-02 2026-08-31 ok
keylogger.nicmanager.com 4 2026-04-21 2026-08-20 ok
www.keylogger.nicmanager.com 4 2026-04-21 2026-08-20 ok
jobs.nicmanager.com 12 2026-05-02 2026-08-30 ok
sales.nicmanager.com 10 2026-05-29 2026-09-26 ok
bookings.nicmanager.com 8 2026-04-20 2026-08-18 ok
forms.nicmanager.com 8 2026-06-07 2026-10-05 ok
stats.nicmanager.com 5 2026-04-30 2026-08-28 ok
mta-sts.nicmanager.com 5 2026-06-04 2026-10-02 ok

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