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.

20 hosts · 254 ms

HostCertsFirst seenLast seenDNS
secretlab.sg 15 2026-05-14 2026-09-27 ok
stagingnsmiddleware2.secretlab.sg 11 2026-04-19 2026-10-01 ok
sandbox-test2.secretlab.sg 2 2026-08-12 2026-08-12 ok
cfweb.secretlab.sg 3 2026-05-16 2026-09-02 ok
c.secretlab.sg 3 2026-04-08 2026-09-24 ok
nsmiddleware.secretlab.sg 10 2026-04-19 2026-10-01 ok
stagingnsmiddleware.secretlab.sg 10 2026-04-19 2026-10-01 ok
pimcore.secretlab.sg 8 2026-04-29 2026-08-13 ok
prbot-staging.secretlab.sg 9 2026-04-19 2026-10-01 ok
couchlog.secretlab.sg 3 2026-06-17 2026-08-19 ok
ssgapi.secretlab.sg 3 2026-05-08 2026-08-24 ok
showroom.secretlab.sg 5 2026-05-25 2026-09-22 ok
ithelpcenter.secretlab.sg 3 2026-05-17 2026-09-08 ok
mta-sts.secretlab.sg 11 2026-01-26 2026-10-01 ok
pimcoreuat.secretlab.sg 7 2026-06-02 2026-08-13 ok
prbot.secretlab.sg 10 2026-04-19 2026-10-01 ok
sandbox-test.secretlab.sg 4 2026-08-11 2026-08-11 ok
hangout.secretlab.sg 4 2026-04-20 2026-09-29 ok
pimcoredev.secretlab.sg 10 2026-04-09 2026-08-13 ok
www.secretlab.sg 15 2026-05-07 2026-09-17 ok

Programmatic access, with DNS A records: API GET /v1/hosts/secretlab.sg (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/secretlab.sg.