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 · 374 ms

HostCertsFirst seenLast seenDNS
jns.org 6 2026-01-22 2026-08-06 ok
*.jns.org 2 2026-01-22 2026-01-25 —
static.jns.org 2 2026-02-02 2026-02-02 ok
give.jns.org 5 2026-04-15 2026-08-17 ok
giving.jns.org 10 2026-04-24 2026-08-20 ok
link.jns.org 1 2026-09-14 2026-09-14 ok
cdn.jns.org 2 2026-01-22 2026-01-22 nxdomain
go.jns.org 8 2026-05-11 2026-09-06 ok
cms-bsp.jns.org 3 2026-02-04 2026-02-04 ok
cms.jns.org 2 2026-01-22 2026-01-22 nxdomain
facts.jns.org 16 2026-04-29 2026-08-25 ok
mta-sts.jns.org 2 2026-06-16 2026-08-26 ok
img.news.jns.org 16 2026-04-16 2026-08-12 ok
r.news.jns.org 3 2026-06-09 2026-08-28 ok
www.jns.org 4 2026-03-06 2026-08-06 ok

Programmatic access, with DNS A records: API GET /v1/hosts/jns.org (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/jns.org.