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.

13 hosts · 302 ms

HostCertsFirst seenLast seenDNS
ebook5.net 5 2026-05-30 2026-09-28 ok
img01.ebook5.net 9 2026-06-01 2026-09-30 ok
log1.ebook5.net 10 2026-04-30 2026-09-30 ok
domdom2.ebook5.net 11 2026-04-30 2026-09-30 ok
lic.ebook5.net 11 2026-04-30 2026-09-30 ok
pre.ebook5.net 10 2026-04-30 2026-09-30 ok
dev-img.ebook5.net 1 2026-02-06 2026-02-06 ok
domdom.ebook5.net 11 2026-04-30 2026-09-30 ok
asp.ebook5.net 13 2026-05-01 2026-09-30 ok
mta-sts.ebook5.net 9 2026-05-31 2026-09-30 ok
edit.ebook5.net 11 2026-04-30 2026-09-30 ok
www.ebook5.net 13 2026-04-30 2026-09-28 ok
my.ebook5.net 11 2026-04-30 2026-09-30 ok

Programmatic access, with DNS A records: API GET /v1/hosts/ebook5.net (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/ebook5.net.