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.

31 hosts · 397 ms

HostCertsFirst seenLast seenDNS
atlar.com 10 2025-10-28 2026-08-12 ok
*.staging.atlar.com 2 2025-12-24 2025-12-24 —
webhooks.connectivity.staging.atlar.com 2 2025-08-11 2026-07-12 nxdomain
d93c1c8c-5d3e-4912-b6b5-0749bdd82189.060ca832-8f21-4606-8f18-f0876f5355cf.webhooks.connectivity.staging.atlar.com 2 2025-08-11 2026-07-12 ok
api.atlar.com 2 2025-08-12 2026-07-13 ok
*.staging.internal.atlar.com 2 2025-08-06 2026-07-07 —
*.production.internal.atlar.com 2 2025-08-06 2026-07-07 —
*.production-us.internal.atlar.com 2 2026-08-27 2026-08-27 —
*.test.internal.atlar.com 6 2026-07-13 2026-08-25 —
cdn.atlar.com 2 2026-03-19 2026-08-19 ok
*.production.atlar.com 5 2026-03-31 2026-09-01 —
9913474a88d0d649a6a62078.connectivity.production.atlar.com 1 2026-05-19 2026-05-19 ok
www.9913474a88d0d649a6a62078.connectivity.production.atlar.com 1 2026-05-19 2026-05-19 nxdomain
75dc45daa152f6f5a726beb8.connectivity.production.atlar.com 2 2025-12-10 2025-12-10 nxdomain
01b847cdf2264627a40c.connectivity.production.atlar.com 2 2025-12-16 2025-12-16 nxdomain
webhooks.connectivity.production.atlar.com 2 2025-08-11 2026-07-12 nxdomain
4d569281-96b5-4c78-90fd-0ddce2fb256e.a0da8333-6f87-43a5-b027-43d2d2f903e9.webhooks.connectivity.production.atlar.com 2 2025-08-11 2026-07-12 ok
mcp.atlar.com 1 2026-05-08 2026-05-08 ok
app.atlar.com 2 2025-08-11 2026-07-12 ok
docs.atlar.com 14 2026-05-10 2026-09-05 ok
careers.atlar.com 12 2026-05-02 2026-10-02 ok
*.production-us.atlar.com 4 2026-08-27 2026-08-27 —
status.atlar.com 18 2026-06-01 2026-10-02 ok
support.atlar.com 5 2026-05-22 2026-09-23 ok
*.test.atlar.com 12 2026-07-13 2026-08-25 —
trust.atlar.com 13 2026-05-18 2026-09-13 ok
www.atlar.com 8 2026-04-15 2026-08-12 ok
signature.PROD.connectivity.atlar.com 1 2025-12-02 2025-12-02 —
transport.PROD.connectivity.atlar.com 2 2025-12-02 2025-12-10 —
signature.UAT.connectivity.atlar.com 1 2025-09-16 2025-09-16 —
transport.UAT.connectivity.atlar.com 1 2025-09-15 2025-09-15 —

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