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.

23 hosts · 343 ms

HostCertsFirst seenLast seenDNS
techowlshield.com 30 2026-04-18 2026-10-01 ok
*.techowlshield.com 25 2026-04-18 2026-10-01 —
ioc.techowlshield.com 5 2026-04-26 2026-08-24 ok
stagingioc.techowlshield.com 5 2026-06-03 2026-10-01 ok
dmarc.techowlshield.com 5 2026-04-26 2026-08-24 ok
stagingdmarc.techowlshield.com 5 2026-06-03 2026-10-01 ok
blog.techowlshield.com 5 2026-05-05 2026-09-03 ok
phish.techowlshield.com 4 2026-04-17 2026-08-15 ok
stagingauth.techowlshield.com 5 2026-06-05 2026-10-03 ok
stagingcspm.techowlshield.com 3 2026-07-16 2026-09-14 ok
tprm.techowlshield.com 5 2026-05-20 2026-09-18 ok
stagingtprm.techowlshield.com 5 2026-06-03 2026-10-01 ok
admin.techowlshield.com 5 2026-05-24 2026-09-22 ok
stageadmin.techowlshield.com 2 2026-05-16 2026-05-16 nxdomain
stagingadmin.techowlshield.com 4 2026-05-29 2026-09-09 ok
help.techowlshield.com 5 2026-05-18 2026-09-20 ok
app.techowlshield.com 5 2026-05-25 2026-09-23 ok
stagingapp.techowlshield.com 4 2026-05-29 2026-09-09 ok
stagingbas.techowlshield.com 3 2026-07-18 2026-09-16 ok
lms.techowlshield.com 5 2026-04-27 2026-08-25 ok
chat.techowlshield.com 5 2026-05-20 2026-09-18 ok
www.techowlshield.com 5 2026-05-03 2026-08-31 ok
sandbox.techowlshield.com 3 2026-06-26 2026-08-24 ok

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