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.

56 hosts · 369 ms

HostCertsFirst seenLast seenDNS
starfieldtech.com 10 2025-10-01 2026-09-27 ok
acme.starfieldtech.com 10 2026-04-06 2026-09-20 ok
ote.starfieldtech.com 8 2025-12-24 2026-09-18 nxdomain
www.ote.starfieldtech.com 8 2025-12-24 2026-09-18 nxdomain
usf.starfieldtech.com 5 2025-09-15 2026-09-16 nxdomain
www.usf.starfieldtech.com 5 2025-09-15 2026-09-16 nxdomain
tsa.stg.starfieldtech.com 7 2025-07-27 2026-09-14 nxdomain
api.pki.stg.starfieldtech.com 7 2025-07-27 2026-09-14 ok
seal.stg.starfieldtech.com 8 2025-07-27 2026-10-02 ok
crl.stg.starfieldtech.com 7 2025-07-27 2026-09-14 ok
ocsp.stg.starfieldtech.com 7 2025-07-27 2026-09-14 ok
pki.starfieldtech.com 3 2025-10-20 2026-09-29 nodata
*.pki.starfieldtech.com 3 2025-10-20 2026-09-29 —
api.pki.starfieldtech.com 6 2026-04-06 2026-09-20 ok
mastercert.ext.pki.starfieldtech.com 6 2026-04-06 2026-09-20 nxdomain
www.mastercert.ext.pki.starfieldtech.com 6 2026-04-06 2026-09-20 nxdomain
seal.starfieldtech.com 6 2026-04-06 2026-09-20 ok
ssl-ccp.starfieldtech.com 6 2026-04-06 2026-09-20 nxdomain
certificates.starfieldtech.com 4 2025-12-18 2026-07-21 ok
www.certificates.starfieldtech.com 4 2025-12-18 2026-07-21 nxdomain
certs.starfieldtech.com 6 2026-04-06 2026-09-20 ok
widget.starfieldtech.com 10 2025-06-10 2026-10-01 ok
api.widget.starfieldtech.com 1 2026-01-16 2026-01-16 nxdomain
www.api.widget.starfieldtech.com 1 2026-01-16 2026-01-16 nxdomain
www.widget.starfieldtech.com 5 2025-06-10 2026-06-22 nxdomain
api.pki.test.int.starfieldtech.com 6 2025-07-19 2026-09-20 nxdomain
seal.pki.test.int.starfieldtech.com 6 2025-07-19 2026-09-20 nxdomain
api.pki.dev.int.starfieldtech.com 5 2025-07-19 2026-07-09 nxdomain
seal.pki.dev.int.starfieldtech.com 5 2025-07-19 2026-07-09 nxdomain
revoked.sf-tls-issuing-dv-r1v1.catest.starfieldtech.com 3 2025-10-02 2026-10-02 ok
www.revoked.sf-tls-issuing-dv-r1v1.catest.starfieldtech.com 1 2026-10-02 2026-10-02 nxdomain
valid.sf-tls-issuing-dv-r1v1.catest.starfieldtech.com 3 2025-10-02 2026-10-02 ok
www.valid.sf-tls-issuing-dv-r1v1.catest.starfieldtech.com 1 2026-10-02 2026-10-02 nxdomain
automation.sf-tls-issuing-dv-r1v1.catest.starfieldtech.com 40 2025-10-02 2026-09-19 ok
revoked.sf-tls-issuing-ev-r1v1.catest.starfieldtech.com 2 2025-10-03 2026-10-02 ok
www.revoked.sf-tls-issuing-ev-r1v1.catest.starfieldtech.com 1 2026-10-02 2026-10-02 nxdomain
valid.sf-tls-issuing-ev-r1v1.catest.starfieldtech.com 2 2025-10-03 2026-10-02 ok
www.valid.sf-tls-issuing-ev-r1v1.catest.starfieldtech.com 1 2026-10-02 2026-10-02 nxdomain
automation.sf-tls-issuing-ev-r1v1.catest.starfieldtech.com 31 2025-10-03 2026-10-02 ok
revoked.sf-tls-issuing-ov-r1v1.catest.starfieldtech.com 2 2025-10-03 2026-10-02 ok
www.revoked.sf-tls-issuing-ov-r1v1.catest.starfieldtech.com 1 2026-10-02 2026-10-02 nxdomain
valid.sf-tls-issuing-ov-r1v1.catest.starfieldtech.com 2 2025-10-03 2026-10-02 ok
www.valid.sf-tls-issuing-ov-r1v1.catest.starfieldtech.com 1 2026-10-02 2026-10-02 nxdomain
automation.sf-tls-issuing-ov-r1v1.catest.starfieldtech.com 31 2025-10-01 2026-09-30 ok
revoked.sfig2.catest.starfieldtech.com 2 2025-09-15 2025-09-16 ok
www.revoked.sfig2.catest.starfieldtech.com 2 2025-09-15 2025-09-16 nxdomain
valid.sfig2.catest.starfieldtech.com 5 2026-02-03 2026-09-21 ok
www.valid.sfig2.catest.starfieldtech.com 5 2026-02-03 2026-09-21 nxdomain
revoked.sfi.catest.starfieldtech.com 2 2025-09-15 2025-09-16 ok
www.revoked.sfi.catest.starfieldtech.com 2 2025-09-15 2025-09-16 nxdomain
valid.sfi.catest.starfieldtech.com 4 2026-02-03 2026-09-21 ok
www.valid.sfi.catest.starfieldtech.com 4 2026-02-03 2026-09-21 nxdomain
tsa.dev.starfieldtech.com 5 2025-07-19 2026-07-09 nxdomain
mediapreview.starfieldtech.com 3 2026-01-15 2026-01-19 nxdomain
www.mediapreview.starfieldtech.com 3 2026-01-15 2026-01-19 nxdomain
www.starfieldtech.com 10 2025-10-01 2026-09-27 ok

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