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.

52 hosts · 333 ms

HostCertsFirst seenLast seenDNS
folio-sec.com 4 2025-07-03 2026-07-21 ok
*.folio-sec.com 16 2025-07-03 2026-09-14 —
ssnb.folio-sec.com 2 2026-04-05 2026-09-05 ok
*.ssnb.folio-sec.com 2 2026-04-05 2026-09-05 —
sbi-itb.folio-sec.com 3 2025-06-18 2026-05-19 ok
*.sbi-itb.folio-sec.com 2 2025-06-18 2026-05-19 —
*.prod.pub.folio-sec.com 3 2025-09-11 2026-08-11 —
*.stg.pub.folio-sec.com 1 2025-11-11 2025-11-11 —
*.mobile.folio-sec.com 2 2025-07-28 2026-06-28 —
ssnb-stg.folio-sec.com 1 2026-02-06 2026-02-06 ok
*.ssnb-stg.folio-sec.com 1 2026-02-04 2026-02-04 —
*.mobile-stg.folio-sec.com 2 2025-06-24 2026-05-25 —
ai-stg.folio-sec.com 12 2026-05-07 2026-09-03 ok
sbi-stg.folio-sec.com 3 2026-04-14 2026-09-14 ok
*.sbi-stg.folio-sec.com 3 2026-04-13 2026-09-13 —
cdform-stg.folio-sec.com 2 2026-04-12 2026-09-12 ok
*.cdform-stg.folio-sec.com 2 2026-04-13 2026-09-13 —
*.st-stg.folio-sec.com 2 2025-08-25 2026-07-24 —
auth.stg.folio-sec.com 10 2026-05-12 2026-09-08 ok
auth.folio-sec.com 10 2026-06-03 2026-09-30 ok
ai.folio-sec.com 8 2026-04-15 2026-08-11 ok
sbi.folio-sec.com 2 2025-09-22 2026-08-23 ok
*.sbi.folio-sec.com 2 2026-04-13 2026-09-13 —
em.folio-sec.com 12 2026-06-02 2026-09-29 ok
aaaaaaaa.test-terraform.folio-sec.com 1 2026-04-21 2026-04-21 nxdomain
yahoo.test-terraform.folio-sec.com 1 2026-04-22 2026-04-22 nxdomain
kosya-dayo.test-terraform.folio-sec.com 1 2026-04-27 2026-04-27 ok
cloudfront-test.test-terraform.folio-sec.com 1 2026-04-21 2026-04-21 nxdomain
cdform.folio-sec.com 1 2025-11-28 2025-11-28 ok
*.cdform.folio-sec.com 2 2026-04-13 2026-09-13 —
*.garden.folio-sec.com 2 2026-03-05 2026-07-21 —
go.folio-sec.com 8 2026-05-08 2026-09-03 ok
repo.folio-sec.com 2 2025-06-24 2026-05-23 ok
*.repo.folio-sec.com 2 2025-06-24 2026-05-23 —
ap.folio-sec.com 12 2026-05-18 2026-09-13 ok
*.op.folio-sec.com 2 2026-03-05 2026-07-21 —
corp.folio-sec.com 3 2025-09-11 2026-08-11 ok
*.corp.folio-sec.com 4 2025-09-11 2026-08-11 —
*.prod.tools.folio-sec.com 1 2026-07-17 2026-07-17 —
*.stg.tools.folio-sec.com 1 2026-07-17 2026-07-17 —
bi.tools.folio-sec.com 3 2026-03-25 2026-08-25 nodata
*.bi.tools.folio-sec.com 3 2026-03-25 2026-08-25 —
lps.folio-sec.com 6 2026-05-24 2026-10-02 ok
champs.folio-sec.com 2 2025-08-15 2026-07-15 nodata
*.st.folio-sec.com 3 2025-09-14 2026-08-14 —
eds.test.folio-sec.com 2 2025-08-04 2026-07-05 ok
a8cv.folio-sec.com 7 2026-04-15 2026-08-14 ok
sandbox.folio-sec.com 5 2025-12-09 2026-09-08 nodata
*.sandbox.folio-sec.com 3 2025-12-09 2026-01-27 —
auth.sandbox.folio-sec.com 10 2026-05-10 2026-09-06 ok
cloudfront-test.sandbox.folio-sec.com 1 2026-04-21 2026-04-21 nxdomain
story.folio-sec.com 2 2025-08-23 2026-07-23 ok

Programmatic access, with DNS A records: API GET /v1/hosts/folio-sec.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/folio-sec.com.