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 · 371 ms

HostCertsFirst seenLast seenDNS
instagram.com 546 2026-04-09 2026-10-06 ok
*.instagram.com 546 2026-04-09 2026-10-06 —
beta.instagram.com 336 2026-04-09 2026-10-06 nxdomain
*.beta.instagram.com 336 2026-04-09 2026-10-06 —
upload.instagram.com 285 2026-04-09 2026-10-06 ok
*.upload.instagram.com 285 2026-04-09 2026-10-06 —
rupload.instagram.com 292 2026-04-09 2026-10-06 ok
*.rupload.instagram.com 292 2026-04-09 2026-10-06 —
at-od.instagram.com 287 2026-04-09 2026-10-06 ok
*.at-od.instagram.com 287 2026-04-09 2026-10-06 —
prod.instagram.com 334 2026-04-09 2026-10-06 nodata
*.prod.instagram.com 334 2026-04-09 2026-10-06 —
someprod.instagram.com 337 2026-04-09 2026-10-06 nodata
*.someprod.instagram.com 337 2026-04-09 2026-10-06 —
trunkstable.instagram.com 291 2026-04-09 2026-10-06 ok
*.trunkstable.instagram.com 291 2026-04-09 2026-10-06 —
secure.instagram.com 289 2026-04-09 2026-10-06 ok
*.secure.instagram.com 289 2026-04-09 2026-10-06 —
graph.instagram.com 544 2026-04-09 2026-10-06 ok
*.graph.instagram.com 544 2026-04-09 2026-10-06 —
i.instagram.com 544 2026-04-09 2026-10-06 ok
*.i.instagram.com 544 2026-04-09 2026-10-06 —
m.instagram.com 290 2026-04-09 2026-10-06 ok
*.m.instagram.com 290 2026-04-09 2026-10-06 —
intern.instagram.com 331 2026-04-09 2026-10-06 ok
*.intern.instagram.com 331 2026-04-09 2026-10-06 —
autodiscover.instagram.com 1 2025-10-15 2025-10-15 ok
maps.instagram.com 285 2026-04-09 2026-10-06 ok
*.maps.instagram.com 285 2026-04-09 2026-10-06 —
latest.instagram.com 339 2026-04-09 2026-10-06 nodata
*.latest.instagram.com 339 2026-04-09 2026-10-06 —
secure.latest.instagram.com 307 2026-04-09 2026-10-06 ok
*.secure.latest.instagram.com 307 2026-04-09 2026-10-06 —
www.instagram.com 288 2026-04-09 2026-10-06 ok
*.www.instagram.com 288 2026-04-09 2026-10-06 —

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