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.

100 hosts (first page) · 550 ms

HostCertsFirst seenLast seenDNS
calm.com 3 2025-12-21 2026-01-12 ok
*.calm.com 25 2025-06-21 2026-09-14 —
*.aws-dev-1.useast1.calm.com 2 2025-10-03 2026-09-01 —
*.data.aws-dev-1.useast1.calm.com 2 2025-10-03 2026-09-01 —
*.db.aws-dev-1.useast1.calm.com 2 2025-10-03 2026-09-01 —
*.service.aws-dev-1.useast1.calm.com 2 2025-10-03 2026-09-01 —
*.cdn.aws-dev-1.useast1.calm.com 2 2025-10-03 2026-09-01 —
*.admin.aws-dev-1.useast1.calm.com 2 2025-10-03 2026-09-01 —
*.app.aws-dev-1.useast1.calm.com 2 2025-10-03 2026-09-01 —
partner.aws-dev-1.useast1.calm.com 2 2026-02-24 2026-07-12 ok
*.aws-dev-2.useast1.calm.com 2 2025-10-14 2026-09-13 —
*.data.aws-dev-2.useast1.calm.com 2 2025-10-14 2026-09-13 —
*.db.aws-dev-2.useast1.calm.com 2 2025-10-14 2026-09-13 —
*.service.aws-dev-2.useast1.calm.com 2 2025-10-14 2026-09-13 —
*.cdn.aws-dev-2.useast1.calm.com 2 2025-10-14 2026-09-13 —
*.admin.aws-dev-2.useast1.calm.com 2 2025-10-14 2026-09-13 —
*.app.aws-dev-2.useast1.calm.com 2 2025-10-14 2026-09-13 —
partner.aws-dev-2.useast1.calm.com 2 2026-02-24 2026-07-12 ok
*.aws-dev-3.useast1.calm.com 2 2025-10-15 2026-09-14 —
*.data.aws-dev-3.useast1.calm.com 2 2025-10-15 2026-09-14 —
*.db.aws-dev-3.useast1.calm.com 2 2025-10-15 2026-09-14 —
*.service.aws-dev-3.useast1.calm.com 2 2025-10-15 2026-09-14 —
*.cdn.aws-dev-3.useast1.calm.com 2 2025-10-15 2026-09-14 —
*.admin.aws-dev-3.useast1.calm.com 2 2025-10-15 2026-09-14 —
*.app.aws-dev-3.useast1.calm.com 2 2025-10-15 2026-09-14 —
partner.aws-dev-3.useast1.calm.com 2 2026-02-24 2026-07-12 ok
*.aws-dev-4.useast1.calm.com 2 2025-10-15 2026-09-14 —
*.data.aws-dev-4.useast1.calm.com 2 2025-10-15 2026-09-14 —
*.db.aws-dev-4.useast1.calm.com 2 2025-10-15 2026-09-14 —
*.service.aws-dev-4.useast1.calm.com 2 2025-10-15 2026-09-14 —
*.cdn.aws-dev-4.useast1.calm.com 2 2025-10-15 2026-09-14 —
*.admin.aws-dev-4.useast1.calm.com 2 2025-10-15 2026-09-14 —
*.app.aws-dev-4.useast1.calm.com 2 2025-10-15 2026-09-14 —
partner.aws-dev-4.useast1.calm.com 2 2026-02-24 2026-07-12 ok
*.aws-dev-5.useast1.calm.com 2 2025-10-15 2026-09-14 —
*.data.aws-dev-5.useast1.calm.com 2 2025-10-15 2026-09-14 —
*.db.aws-dev-5.useast1.calm.com 2 2025-10-15 2026-09-14 —
*.service.aws-dev-5.useast1.calm.com 2 2025-10-15 2026-09-14 —
*.cdn.aws-dev-5.useast1.calm.com 2 2025-10-15 2026-09-14 —
*.admin.aws-dev-5.useast1.calm.com 2 2025-10-15 2026-09-14 —
*.app.aws-dev-5.useast1.calm.com 2 2025-10-15 2026-09-14 —
partner.aws-dev-5.useast1.calm.com 2 2026-02-25 2026-07-13 ok
*.aws-dev-6.useast1.calm.com 1 2025-11-24 2025-11-24 —
*.data.aws-dev-6.useast1.calm.com 1 2025-11-24 2025-11-24 —
*.db.aws-dev-6.useast1.calm.com 1 2025-11-24 2025-11-24 —
*.service.aws-dev-6.useast1.calm.com 1 2025-11-24 2025-11-24 —
*.cdn.aws-dev-6.useast1.calm.com 1 2025-11-24 2025-11-24 —
*.admin.aws-dev-6.useast1.calm.com 1 2025-11-24 2025-11-24 —
*.app.aws-dev-6.useast1.calm.com 1 2025-11-24 2025-11-24 —
partner.aws-dev-6.useast1.calm.com 1 2025-11-26 2025-11-26 ok
*.aws-dev-7.useast1.calm.com 1 2025-12-07 2025-12-07 —
*.data.aws-dev-7.useast1.calm.com 1 2025-12-07 2025-12-07 —
*.db.aws-dev-7.useast1.calm.com 1 2025-12-07 2025-12-07 —
*.service.aws-dev-7.useast1.calm.com 1 2025-12-07 2025-12-07 —
*.cdn.aws-dev-7.useast1.calm.com 1 2025-12-07 2025-12-07 —
*.admin.aws-dev-7.useast1.calm.com 1 2025-12-07 2025-12-07 —
*.app.aws-dev-7.useast1.calm.com 1 2025-12-07 2025-12-07 —
partner.aws-dev-7.useast1.calm.com 1 2025-12-10 2025-12-10 ok
*.aws-data-prod.useast1.calm.com 2 2026-04-02 2026-09-02 —
*.data.aws-data-prod.useast1.calm.com 2 2026-04-02 2026-09-02 —
*.db.aws-data-prod.useast1.calm.com 2 2026-04-02 2026-09-02 —
*.service.aws-data-prod.useast1.calm.com 2 2026-04-02 2026-09-02 —
*.cdn.aws-data-prod.useast1.calm.com 2 2026-04-02 2026-09-02 —
*.admin.aws-data-prod.useast1.calm.com 2 2026-04-02 2026-09-02 —
*.app.aws-data-prod.useast1.calm.com 2 2026-04-02 2026-09-02 —
*.aws-sleep-prod.useast1.calm.com 2 2026-04-05 2026-09-05 —
*.data.aws-sleep-prod.useast1.calm.com 2 2026-04-05 2026-09-05 —
*.db.aws-sleep-prod.useast1.calm.com 2 2026-04-05 2026-09-05 —
*.service.aws-sleep-prod.useast1.calm.com 2 2026-04-05 2026-09-05 —
*.cdn.aws-sleep-prod.useast1.calm.com 2 2026-04-05 2026-09-05 —
*.admin.aws-sleep-prod.useast1.calm.com 2 2026-04-05 2026-09-05 —
*.app.aws-sleep-prod.useast1.calm.com 2 2026-04-05 2026-09-05 —
*.aws-prod.useast1.calm.com 1 2025-12-21 2025-12-21 —
*.data.aws-prod.useast1.calm.com 1 2025-12-21 2025-12-21 —
*.db.aws-prod.useast1.calm.com 1 2025-12-21 2025-12-21 —
*.service.aws-prod.useast1.calm.com 1 2025-12-21 2025-12-21 —
*.cdn.aws-prod.useast1.calm.com 1 2025-12-21 2025-12-21 —
*.admin.aws-prod.useast1.calm.com 1 2025-12-21 2025-12-21 —
*.app.aws-prod.useast1.calm.com 1 2025-12-21 2025-12-21 —
*.aws-data-stage.useast1.calm.com 2 2025-08-29 2026-07-29 —
*.data.aws-data-stage.useast1.calm.com 2 2025-08-29 2026-07-29 —
*.db.aws-data-stage.useast1.calm.com 2 2025-08-29 2026-07-29 —
*.service.aws-data-stage.useast1.calm.com 2 2025-08-29 2026-07-29 —
*.cdn.aws-data-stage.useast1.calm.com 2 2025-08-29 2026-07-29 —
*.admin.aws-data-stage.useast1.calm.com 2 2025-08-29 2026-07-29 —
*.app.aws-data-stage.useast1.calm.com 2 2025-08-29 2026-07-29 —
*.aws-ops.useast1.calm.com 2 2025-09-09 2026-08-09 —
*.data.aws-ops.useast1.calm.com 2 2025-09-09 2026-08-09 —
*.db.aws-ops.useast1.calm.com 2 2025-09-09 2026-08-09 —
*.service.aws-ops.useast1.calm.com 2 2025-09-09 2026-08-09 —
*.cdn.aws-ops.useast1.calm.com 2 2025-09-09 2026-08-09 —
*.admin.aws-ops.useast1.calm.com 2 2025-09-09 2026-08-09 —
*.app.aws-ops.useast1.calm.com 2 2025-09-09 2026-08-09 —
*.aws-data-dev.useast1.calm.com 2 2025-10-18 2026-09-17 —
*.data.aws-data-dev.useast1.calm.com 2 2025-10-18 2026-09-17 —
*.db.aws-data-dev.useast1.calm.com 2 2025-10-18 2026-09-17 —
*.service.aws-data-dev.useast1.calm.com 2 2025-10-18 2026-09-17 —
*.cdn.aws-data-dev.useast1.calm.com 2 2025-10-18 2026-09-17 —
*.admin.aws-data-dev.useast1.calm.com 2 2025-10-18 2026-09-17 —
*.app.aws-data-dev.useast1.calm.com 2 2025-10-18 2026-09-17 —

Showing the first 100 hostnames — sign in with GitHub or Google to page the full list, or use the API with an API key: GET /v1/hosts/calm.com.

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/calm.com.