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.

25 hosts · 428 ms

HostCertsFirst seenLast seenDNS
covenanthouse.org 17 2026-04-25 2026-09-08 ok
*.covenanthouse.org 10 2026-05-11 2026-09-08 —
portal.covenanthouse.org 10 2026-05-28 2026-09-23 ok
gtm.covenanthouse.org 3 2026-05-09 2026-08-22 ok
action.covenanthouse.org 1 2026-05-10 2026-05-10 ok
gifts.covenanthouse.org 11 2026-04-13 2026-09-25 ok
redeemgift.covenanthouse.org 5 2026-05-26 2026-09-24 ok
host.covenanthouse.org 1 2026-09-15 2026-09-15 ok
ipv6.host.covenanthouse.org 1 2026-09-15 2026-09-15 nodata
autoconfig.host.covenanthouse.org 1 2026-09-15 2026-09-15 nodata
webdisk.host.covenanthouse.org 1 2026-09-15 2026-09-15 nodata
cpanel.host.covenanthouse.org 1 2026-09-15 2026-09-15 nodata
mail.host.covenanthouse.org 1 2026-09-15 2026-09-15 ok
webmail.host.covenanthouse.org 1 2026-09-15 2026-09-15 nodata
whm.host.covenanthouse.org 1 2026-09-15 2026-09-15 nodata
autodiscover.host.covenanthouse.org 1 2026-09-15 2026-09-15 nodata
cpcalendars.host.covenanthouse.org 1 2026-09-15 2026-09-15 nodata
cpcontacts.host.covenanthouse.org 1 2026-09-15 2026-09-15 nodata
www.host.covenanthouse.org 1 2026-09-15 2026-09-15 ok
dev.covenanthouse.org 4 2026-05-17 2026-07-17 ok
mail.dev.covenanthouse.org 4 2026-05-17 2026-07-17 ok
www.dev.covenanthouse.org 4 2026-05-17 2026-07-17 ok
www.covenanthouse.org 7 2026-04-25 2026-08-27 ok
ny.covenanthouse.org 4 2026-04-20 2026-08-18 ok
www.ny.covenanthouse.org 5 2026-06-09 2026-10-07 ok

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