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.

15 hosts · 304 ms

HostCertsFirst seenLast seenDNS
lenme.com 23 2026-05-06 2026-08-27 ok
url8390.lenme.com 1 2026-02-05 2026-02-05 ok
click.lenme.com 12 2026-05-05 2026-08-31 ok
img.mail.lenme.com 8 2026-05-06 2026-09-02 ok
r.mail.lenme.com 3 2026-06-18 2026-09-06 ok
dataroom.lenme.com 1 2026-09-26 2026-09-26 ok
go.lenme.com 2 2026-09-02 2026-09-02 ok
help.lenme.com 9 2026-05-24 2026-09-19 ok
corp.lenme.com 4 2026-07-31 2026-09-30 ok
docs.lenme.com 12 2026-04-10 2026-10-05 ok
sms.lenme.com 5 2026-09-01 2026-09-01 ok
offers.lenme.com 10 2026-05-04 2026-08-31 ok
r.news.lenme.com 3 2026-06-20 2026-09-08 ok
support.lenme.com 2 2026-04-25 2026-04-25 nxdomain
www.lenme.com 9 2026-05-06 2026-09-03 ok

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