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.

15 hosts · 309 ms

HostCertsFirst seenLast seenDNS
sifted.com 33 2026-01-02 2026-09-29 ok
*.sifted.com 21 2025-08-12 2026-09-29 —
staging2.sifted.com 1 2026-08-26 2026-08-26 ok
ic.sifted.com 5 2026-04-18 2026-09-27 ok
devpulse.sifted.com 2 2026-03-19 2026-08-19 ok
devpulse-staging.sifted.com 2 2026-03-19 2026-08-19 ok
intel.sifted.com 10 2026-04-23 2026-09-19 ok
info.sifted.com 10 2026-05-06 2026-10-03 ok
hello.sifted.com 6 2026-05-21 2026-10-02 ok
ithelp.sifted.com 3 2026-05-14 2026-08-28 ok
status.sifted.com 7 2026-05-16 2026-09-23 ok
data.product.sifted.com 5 2026-05-29 2026-09-12 ok
content.product.sifted.com 5 2026-03-12 2026-08-31 ok
devpulse-dev.sifted.com 2 2026-03-19 2026-08-19 nodata
www.sifted.com 11 2026-04-19 2026-08-22 ok

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