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.

35 hosts · 682 ms

HostCertsFirst seenLast seenDNS
sfcu.org 13 2025-09-23 2026-09-12 ok
*.sfcu.org 12 2025-09-23 2026-09-12 —
sac-saf-qa1.sfcu.org 2 2025-07-29 2026-08-06 nxdomain
raja.sfcu.org 1 2026-01-14 2026-01-14 ok
bigred.sfcu.org 5 2026-04-08 2026-10-03 ok
sac-saf-prod.sfcu.org 1 2026-09-10 2026-09-10 nxdomain
BizChex-prod.sfcu.org 2 2025-10-14 2025-10-27 —
cardwizard.sfcu.org 2 2025-07-22 2026-07-27 nxdomain
e.sfcu.org 12 2025-11-10 2026-08-28 ok
billpayprod.e.sfcu.org 5 2025-10-14 2026-09-25 ok
www.billpayprod.e.sfcu.org 3 2025-10-14 2025-10-14 nxdomain
billpaycert.e.sfcu.org 7 2025-10-15 2026-09-25 ok
www.billpaycert.e.sfcu.org 3 2025-10-15 2025-10-15 nxdomain
www.e.sfcu.org 1 2025-11-10 2025-11-10 nxdomain
marketplace.sfcu.org 10 2026-05-09 2026-09-05 ok
infoimage.sfcu.org 5 2026-02-02 2026-09-17 ok
staging.sfcu.org 8 2026-04-22 2026-08-18 ok
blog.sfcu.org 8 2026-04-25 2026-08-19 ok
BizChex-stg.sfcu.org 2 2025-10-14 2025-10-27 —
branch-portal.sfcu.org 4 2026-06-23 2026-08-21 ok
secureemail.sfcu.org 2 2025-06-16 2026-06-22 ok
www.secureemail.sfcu.org 2 2025-06-16 2026-06-22 nxdomain
sac-saf-qa-trn.sfcu.org 1 2026-08-07 2026-08-07 nxdomain
info.sfcu.org 12 2026-04-22 2026-08-19 ok
wires.sfcu.org 1 2025-09-25 2025-09-25 ok
www.wires.sfcu.org 1 2025-09-25 2025-09-25 nxdomain
loans.sfcu.org 6 2026-05-02 2026-08-28 ok
offers.sfcu.org 10 2026-04-23 2026-08-19 ok
pilot.sfcu.org 9 2026-05-21 2026-09-17 ok
www.sfcu.org 11 2026-03-27 2026-08-18 ok
businessbillpay.sfcu.org 1 2026-02-23 2026-02-23 nxdomain
cert.businessbillpay.sfcu.org 1 2026-02-23 2026-02-23 nxdomain
www.cert.businessbillpay.sfcu.org 1 2026-02-23 2026-02-23 nxdomain
www.businessbillpay.sfcu.org 1 2026-02-23 2026-02-23 nxdomain
apply.sfcu.org 6 2026-04-07 2026-09-26 ok

Programmatic access, with DNS A records: API GET /v1/hosts/sfcu.org (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/sfcu.org.