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.

33 hosts · 380 ms

HostCertsFirst seenLast seenDNS
fetlife.com 19 2026-04-22 2026-09-29 ok
*.fetlife.com 11 2026-05-14 2026-09-29 —
inbound01.fetlife.com 1 2026-09-15 2026-09-15 ok
stgav2-2.fetlife.com 2 2026-04-22 2026-04-22 nxdomain
stwsv5-2.fetlife.com 5 2026-04-17 2026-09-25 ok
stwso-2.fetlife.com 4 2026-06-04 2026-10-02 nxdomain
staging2.fetlife.com 2 2026-04-22 2026-04-22 ok
stgav2.fetlife.com 2 2026-04-22 2026-04-22 nxdomain
wsv5.fetlife.com 5 2026-04-18 2026-09-30 ok
stwsv5.fetlife.com 7 2026-04-13 2026-09-24 ok
scuba.fetlife.com 1 2026-10-04 2026-10-04 nodata
welcome.fetlife.com 5 2026-06-08 2026-09-10 ok
staging.fetlife.com 2 2026-04-22 2026-04-22 ok
cdn.fetlife.com 11 2026-05-26 2026-09-21 nodata
*.cdn.fetlife.com 11 2026-05-26 2026-09-21 —
wso.fetlife.com 4 2026-06-04 2026-10-02 nxdomain
stwso.fetlife.com 4 2026-06-04 2026-10-02 nxdomain
to.fetlife.com 5 2026-06-08 2026-09-23 ok
up.fetlife.com 6 2026-05-05 2026-08-31 nodata
*.up.fetlife.com 6 2026-05-05 2026-08-31 —
releases.fetlife.com 8 2026-06-22 2026-09-30 ok
logout-gifs.fetlife.com 8 2026-06-22 2026-09-30 ok
videos-hls-fos.fetlife.com 8 2026-06-22 2026-09-30 ok
videos-fos.fetlife.com 8 2026-06-22 2026-09-30 ok
audios.fetlife.com 8 2026-06-22 2026-09-30 ok
ass.fetlife.com 12 2026-04-30 2026-08-06 ok
*.ass.fetlife.com 12 2026-04-30 2026-08-06 —
sass.fetlife.com 15 2026-04-29 2026-08-26 ok
*.sass.fetlife.com 15 2026-04-29 2026-08-26 —
assets.fetlife.com 9 2026-06-15 2026-09-23 ok
preservation-requests.fetlife.com 8 2026-06-22 2026-09-30 ok
status.fetlife.com 5 2026-06-04 2026-09-10 ok
member-data-export.fetlife.com 8 2026-06-22 2026-09-30 ok

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