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.

40 hosts · 340 ms

HostCertsFirst seenLast seenDNS
capchase.com 72 2026-04-16 2026-09-13 ok
*.capchase.com 50 2026-04-16 2026-09-06 —
*.beta.capchase.com 10 2026-04-16 2026-08-12 —
lab.capchase.com 13 2026-06-06 2026-10-02 ok
*.lab.capchase.com 13 2026-06-06 2026-10-02 —
login.lab.capchase.com 10 2026-06-02 2026-09-29 ok
*.playground.capchase.com 14 2026-04-16 2026-08-12 —
login.playground.capchase.com 10 2026-04-25 2026-08-22 ok
mcp-prod.capchase.com 2 2026-05-25 2026-05-25 nxdomain
knowledge.capchase.com 4 2026-04-18 2026-06-17 nxdomain
explore.capchase.com 17 2026-06-04 2026-10-01 ok
*.testing.capchase.com 12 2026-04-23 2026-08-19 —
login.testing.capchase.com 10 2026-04-24 2026-08-21 ok
login.capchase.com 10 2026-04-24 2026-08-20 ok
*.mcp.capchase.com 16 2026-05-27 2026-09-22 —
vartanadb.mcp.capchase.com 2 2026-09-10 2026-09-10 ok
mastradb.mcp.capchase.com 2 2026-08-13 2026-08-13 ok
clientdb.mcp.capchase.com 2 2026-08-13 2026-08-13 ok
time.mcp.capchase.com 2 2026-05-27 2026-05-27 nxdomain
gong.mcp.capchase.com 11 2026-05-27 2026-09-22 ok
looker.mcp.capchase.com 8 2026-05-27 2026-09-22 ok
postgres.mcp.capchase.com 4 2026-05-27 2026-07-25 ok
1minutetermsheet.capchase.com 4 2026-05-03 2026-07-03 ok
meet.capchase.com 10 2026-04-18 2026-08-14 ok
login.development.capchase.com 10 2026-04-25 2026-08-22 ok
support.capchase.com 2 2025-08-04 2026-07-05 ok
mcp-test.capchase.com 2 2026-05-23 2026-05-23 nxdomain
*.dev.capchase.com 15 2026-04-16 2026-08-12 —
www.capchase.com 12 2026-05-08 2026-09-03 ok
mcp-sandbox.capchase.com 2 2026-05-25 2026-05-25 nxdomain
*.sandbox.capchase.com 29 2026-04-16 2026-08-12 —
login.sandbox.capchase.com 10 2026-04-25 2026-08-21 ok
*.mcp.sandbox.capchase.com 16 2026-05-27 2026-09-22 —
clientdb.mcp.sandbox.capchase.com 2 2026-08-12 2026-08-12 ok
time.mcp.sandbox.capchase.com 2 2026-05-27 2026-05-27 nxdomain
gong.mcp.sandbox.capchase.com 2 2026-05-27 2026-05-27 nxdomain
datadog.mcp.sandbox.capchase.com 2 2026-05-27 2026-05-27 nxdomain
lightdash.mcp.sandbox.capchase.com 2 2026-08-14 2026-08-14 ok
looker.mcp.sandbox.capchase.com 4 2026-05-27 2026-08-11 nxdomain
postgres.mcp.sandbox.capchase.com 9 2026-05-27 2026-07-25 ok

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