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.

22 hosts · 494 ms

HostCertsFirst seenLast seenDNS
redsailtechnologies.com 18 2026-04-23 2026-08-19 ok
*.redsailtechnologies.com 6 2026-04-27 2026-08-19 —
az1.redsailtechnologies.com 3 2026-04-20 2026-07-18 ok
hub.redsailtechnologies.com 26 2026-04-15 2026-09-30 ok
cpehub.redsailtechnologies.com 13 2026-06-02 2026-09-28 ok
pqhub.redsailtechnologies.com 10 2026-04-15 2026-08-11 ok
asigranoc.redsailtechnologies.com 5 2026-05-01 2026-08-18 ok
hub-stg.redsailtechnologies.com 11 2026-05-20 2026-09-16 ok
cpehub-stg.redsailtechnologies.com 14 2026-06-03 2026-09-29 ok
prxhub-stg.redsailtechnologies.com 9 2026-06-02 2026-09-28 ok
redesign-stg.redsailtechnologies.com 15 2026-06-03 2026-09-29 ok
spapci.redsailtechnologies.com 1 2026-09-28 2026-09-28 ok
ashpci.redsailtechnologies.com 1 2026-09-25 2026-09-25 ok
info.redsailtechnologies.com 12 2026-04-19 2026-08-20 ok
erpservices.redsailtechnologies.com 4 2026-04-20 2026-08-17 ok
redsailmatters.redsailtechnologies.com 5 2026-05-08 2026-08-19 ok
erpservices-uat.redsailtechnologies.com 4 2026-04-20 2026-08-17 ok
hub-cnt.redsailtechnologies.com 10 2026-06-02 2026-09-29 ok
cpehub-cnt.redsailtechnologies.com 11 2026-06-02 2026-09-28 ok
itrequest.redsailtechnologies.com 14 2026-04-20 2026-09-23 ok
erpservices-dev.redsailtechnologies.com 4 2026-04-20 2026-08-17 ok
www.redsailtechnologies.com 6 2026-05-05 2026-08-31 ok

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