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.

7 hosts · 226 ms

HostCertsFirst seenLast seenDNS
airtalkwireless.com 24 2025-09-24 2026-09-19 ok
*.airtalkwireless.com 31 2025-09-24 2026-09-19 —
routing.airtalkwireless.com 4 2025-07-24 2026-06-24 ok
*.routing.airtalkwireless.com 2 2025-07-24 2026-06-24 —
2a57j77ubhgu6usx8dkhw6zu4n39wq9.routing.airtalkwireless.com 2 2025-07-24 2026-06-24 nodata
go.airtalkwireless.com 5 2026-05-11 2026-09-08 ok
checkout.airtalkwireless.com 8 2026-04-21 2026-08-18 ok

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