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.

20 hosts · 336 ms

HostCertsFirst seenLast seenDNS
agentpronto.com 34 2026-04-21 2026-10-01 ok
*.agentpronto.com 18 2026-05-15 2026-10-01 —
2.agentpronto.com 14 2026-05-24 2026-09-19 ok
url1003.agentpronto.com 4 2026-09-23 2026-09-23 ok
29095526.agentpronto.com 12 2026-04-21 2026-09-23 ok
r2-public.agentpronto.com 22 2026-05-08 2026-09-04 ok
as-staging-public.agentpronto.com 17 2026-04-21 2026-08-18 ok
as-public.agentpronto.com 10 2026-04-21 2026-08-17 ok
handshake.agentpronto.com 20 2026-04-21 2026-08-18 ok
r2-public-staging.agentpronto.com 24 2026-05-13 2026-09-09 ok
handshake-staging.agentpronto.com 18 2026-04-22 2026-08-18 ok
as-staging.agentpronto.com 22 2026-04-22 2026-08-18 ok
apx-staging.agentpronto.com 16 2026-04-22 2026-08-18 ok
j.agentpronto.com 8 2026-04-21 2026-08-18 ok
as.agentpronto.com 10 2026-04-21 2026-08-17 ok
uploads.agentpronto.com 16 2026-04-21 2026-08-17 ok
pages.agentpronto.com 4 2026-04-16 2026-08-14 ok
www.agentpronto.com 12 2026-04-21 2026-08-17 ok
lnx.agentpronto.com 12 2026-04-21 2026-09-23 ok
hsk-proxy.agentpronto.com 14 2026-04-22 2026-08-18 ok

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