Find every subdomain
of a domain.

Every hostname under a domain that ever appeared in a public TLS certificate — with certificate counts and first/last seen dates.

58 hosts · 484 ms

HostCertsFirst seenLast seen
sky.uk 2 2026-06-01 2026-06-01
jaketestblockedip2.sky.uk 3 2026-08-19 2026-08-19
timeoutissuetest2.sky.uk 3 2026-09-21 2026-09-21
psb1-enlba.sky.uk 1 2026-03-02 2026-03-02
pentanaprod.sky.uk 2 2025-11-12 2026-09-12
cfs1-gyhhe.sky.uk 3 2025-10-14 2025-10-14
*.stage-cf.sky.uk 10 2025-09-26 2026-08-28
*.test-cf.sky.uk 11 2025-10-02 2026-09-07
*.dev-cf.sky.uk 3 2025-09-19 2026-08-13
*.cf.sky.uk 4 2025-10-03 2026-09-07
mail.sky.uk 1 2025-12-15 2025-12-15
uk-neom.sky.uk 8 2025-09-22 2026-09-22
psb1-bllon.sky.uk 4 2025-12-05 2025-12-08
cfs1-gyslo.sky.uk 1 2025-10-21 2025-10-21
jaketestblockedip.sky.uk 24 2026-08-19 2026-10-02
copilot-metrics.sky.uk 1 2026-07-01 2026-07-01
*.copilot-metrics.sky.uk 1 2026-07-01 2026-07-01
sky-uk.preprod.copilot-metrics.sky.uk 1 2026-06-12 2026-06-12
rogers.preprod.copilot-metrics.sky.uk 1 2026-06-12 2026-06-12
comcast.preprod.copilot-metrics.sky.uk 1 2026-06-12 2026-06-12
dashboard.copilot-metrics.sky.uk 1 2026-07-07 2026-07-07
dashboard-staging.copilot-metrics.sky.uk 1 2026-07-07 2026-07-07
sky-uk.copilot-metrics.sky.uk 1 2026-06-12 2026-06-12
livedocs.copilot-metrics.sky.uk 2 2026-07-10 2026-07-10
rogers.copilot-metrics.sky.uk 1 2026-06-12 2026-06-12
comcast.copilot-metrics.sky.uk 1 2026-06-12 2026-06-12
copilot-test.copilot-metrics.sky.uk 2 2026-06-12 2026-06-12
dashboard-slewtest.copilot-metrics.sky.uk 1 2026-07-09 2026-07-09
livedocs-slewtest.copilot-metrics.sky.uk 1 2026-07-10 2026-07-10
components-slewtest.copilot-metrics.sky.uk 1 2026-07-10 2026-07-10
cdn-slew.copilot-metrics.sky.uk 1 2026-07-23 2026-07-23
poc-gateway-7.nbcuaux.us-east-1.dev.aws.sky.uk 2 2025-12-22 2025-12-22
poc-gateway-1.nbcuaux.us-east-2.dev.aws.sky.uk 2 2025-12-09 2025-12-09
poc-gateway-2.nbcuaux.us-east-2.dev.aws.sky.uk 8 2025-12-16 2025-12-16
poc-gateway-3.nbcuaux.us-east-2.dev.aws.sky.uk 1 2025-12-16 2025-12-16
poc-gateway-4.nbcuaux.us-east-2.dev.aws.sky.uk 1 2025-12-16 2025-12-16
poc-gateway-5.nbcuaux.us-east-2.dev.aws.sky.uk 1 2025-12-22 2025-12-22
poc-gateway-7.nbcuaux.us-east-2.dev.aws.sky.uk 3 2025-12-22 2025-12-22
poc-api.nbcuaux.us-east-2.dev.aws.sky.uk 5 2025-12-04 2025-12-04
poc-gateway-1.nbcuaux.us-west-2.dev.aws.sky.uk 2 2025-12-09 2025-12-09
poc-gateway-2.nbcuaux.us-west-2.dev.aws.sky.uk 8 2025-12-16 2025-12-16
poc-gateway-3.nbcuaux.us-west-2.dev.aws.sky.uk 1 2025-12-16 2025-12-16
poc-gateway-4.nbcuaux.us-west-2.dev.aws.sky.uk 1 2025-12-16 2025-12-16
poc-gateway-6.nbcuaux.us-west-2.dev.aws.sky.uk 1 2025-12-22 2025-12-22
poc-gateway-7.nbcuaux.us-west-2.dev.aws.sky.uk 3 2025-12-22 2025-12-22
poc-api.nbcuaux.us-west-2.dev.aws.sky.uk 10 2025-12-04 2025-12-08
poc-gateway-1.nbcuaux.dev.aws.sky.uk 2 2025-12-09 2025-12-09
poc-serverless-gateway-1.nbcuaux.dev.aws.sky.uk 3 2025-12-08 2025-12-08
poc-gateway-2.nbcuaux.dev.aws.sky.uk 8 2025-12-16 2025-12-16
poc-gateway-3.nbcuaux.dev.aws.sky.uk 1 2025-12-16 2025-12-16
poc-gateway-4.nbcuaux.dev.aws.sky.uk 1 2025-12-16 2025-12-16
poc-gateway-6.nbcuaux.dev.aws.sky.uk 1 2025-12-22 2025-12-22
poc-gateway-7.nbcuaux.dev.aws.sky.uk 3 2025-12-22 2025-12-22
poc-api.nbcuaux.dev.aws.sky.uk 1 2025-12-03 2025-12-03
poc-serverless-gateway.nbcuaux.dev.aws.sky.uk 11 2025-12-03 2025-12-08
timeoutissuetest.sky.uk 3 2026-09-21 2026-09-21
kipotest.sky.uk 1 2025-08-04 2025-08-04
jake3ext.sky.uk 8 2026-08-13 2026-09-18

Programmatic access: API GET /v1/hosts/sky.uk (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/sky.uk.