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.

14 hosts · 382 ms

HostCertsFirst seenLast seenDNS
remcom.com 10 2025-07-11 2026-08-28 ok
*.remcom.com 2 2025-07-11 2026-07-12 —
www2.remcom.com 3 2026-06-04 2026-06-04 nxdomain
xf7.remcom.com 3 2026-04-30 2026-08-16 nxdomain
ja.remcom.com 12 2026-05-15 2026-09-11 ok
de.remcom.com 8 2026-05-16 2026-09-11 ok
zh.remcom.com 12 2026-05-15 2026-09-11 ok
cisionone-email.remcom.com 5 2026-05-03 2026-08-31 ok
info.remcom.com 5 2026-06-17 2026-10-02 nxdomain
es.remcom.com 8 2026-05-16 2026-09-11 ok
resources.remcom.com 6 2026-05-23 2026-08-22 ok
support.remcom.com 2 2025-07-22 2026-08-12 ok
www.support.remcom.com 2 2025-07-22 2026-08-12 ok
www.remcom.com 11 2026-06-02 2026-09-28 ok

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