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.

100 hosts (first page) · 433 ms

HostCertsFirst seenLast seen
mercury.com 21 2025-08-10 2026-09-15
*.mercury.com 18 2025-08-10 2026-09-08
okta.mercury.com 13 2026-05-01 2026-10-03
1psb.mercury.com 1 2026-04-22 2026-04-22
*.backend.mercury.com 13 2026-06-04 2026-09-30
secure.backend.mercury.com 7 2026-05-14 2026-10-02
lithic.pci.backend.mercury.com 4 2026-04-17 2026-09-04
synapse.pci.backend.mercury.com 4 2026-04-15 2026-09-02
command-internal.backend.mercury.com 1 2026-05-22 2026-05-22
payroll.backend.mercury.com 2 2026-07-02 2026-07-27
lithic.webhooks.backend.mercury.com 3 2026-05-31 2026-08-09
store.mercury.com 7 2026-04-26 2026-09-04
revenue.mercury.com 5 2026-05-14 2026-09-11
email.mg.mercury.com 5 2026-05-26 2026-09-23
staging.mercury.com 11 2026-07-16 2026-09-17
secure.backend-staging.mercury.com 3 2026-05-26 2026-08-04
synapse-staging.pci.backend-staging.mercury.com 4 2026-04-16 2026-09-04
*.staging.mercury.com 12 2026-07-16 2026-09-17
fem.staging.mercury.com 3 2026-07-21 2026-09-23
lithic-staging.pci.backend-staging-earth.mercury.com 3 2026-06-10 2026-08-19
lithic-staging.webhooks.backend-staging-earth.mercury.com 5 2026-04-24 2026-09-11
vault-api.staging-earth.mercury.com 3 2026-07-15 2026-09-23
vault-api.mercury.com 3 2026-07-15 2026-09-23
email-storybook.mercury.com 5 2026-05-03 2026-08-31
vewebhook.mercury.com 1 2026-02-18 2026-02-18
internal.mercury.com 1 2025-11-18 2025-11-18
*.internal.mercury.com 2 2025-08-01 2025-11-18
staging-prod-1.internal.mercury.com 1 2026-02-16 2026-02-16
*.staging-prod-1.internal.mercury.com 1 2026-02-16 2026-02-16
*.mercury-web-backend.staging-prod-1.internal.mercury.com 1 2025-12-04 2025-12-04
staging-prod-2.internal.mercury.com 1 2026-02-15 2026-02-15
*.staging-prod-2.internal.mercury.com 1 2026-02-15 2026-02-15
staging-prod-3.internal.mercury.com 1 2026-02-15 2026-02-15
*.staging-prod-3.internal.mercury.com 1 2026-02-15 2026-02-15
staging-prod-4.internal.mercury.com 1 2026-02-15 2026-02-15
*.staging-prod-4.internal.mercury.com 1 2026-02-15 2026-02-15
staging-prod-5.internal.mercury.com 1 2026-02-15 2026-02-15
*.staging-prod-5.internal.mercury.com 1 2026-02-15 2026-02-15
staging-prod-6.internal.mercury.com 3 2026-04-14 2026-09-14
*.staging-prod-6.internal.mercury.com 3 2026-04-14 2026-09-14
staging-prod-7.internal.mercury.com 3 2026-04-14 2026-09-14
*.staging-prod-7.internal.mercury.com 3 2026-04-14 2026-09-14
staging-prod-8.internal.mercury.com 3 2026-04-14 2026-09-14
*.staging-prod-8.internal.mercury.com 3 2026-04-14 2026-09-14
data.internal.mercury.com 1 2025-11-13 2025-11-13
*.data.internal.mercury.com 1 2025-11-13 2025-11-13
hub.internal.mercury.com 1 2025-11-18 2025-11-18
*.hub.internal.mercury.com 2 2025-08-01 2025-11-18
books-playground.internal.mercury.com 2 2025-07-25 2026-06-25
*.books-playground.internal.mercury.com 2 2025-07-25 2026-06-25
*.preview.books-playground.internal.mercury.com 4 2025-07-25 2026-06-25
preprod.internal.mercury.com 1 2026-02-18 2026-02-18
*.preprod.internal.mercury.com 1 2026-02-18 2026-02-18
vectoredge.internal.mercury.com 1 2026-02-18 2026-02-18
staging.internal.mercury.com 4 2026-01-01 2026-10-06
formal-connector-staging.internal.mercury.com 3 2026-06-30 2026-09-29
*.formal-connector-staging.internal.mercury.com 5 2026-06-30 2026-09-29
books-staging.internal.mercury.com 1 2025-11-10 2025-11-10
*.books-staging.internal.mercury.com 1 2025-11-10 2025-11-10
*.staging.internal.mercury.com 5 2025-08-01 2026-10-06
staging-earth.internal.mercury.com 1 2026-02-15 2026-02-15
*.staging-earth.internal.mercury.com 1 2026-02-15 2026-02-15
unleash-ai.internal.mercury.com 1 2025-07-28 2025-07-28
*.unleash-ai.internal.mercury.com 1 2025-07-28 2025-07-28
*.chalk-ai.internal.mercury.com 1 2025-11-20 2025-11-20
formal-connector-production.internal.mercury.com 3 2026-06-30 2026-09-29
*.formal-connector-production.internal.mercury.com 7 2026-06-18 2026-09-29
books-production.internal.mercury.com 1 2025-11-10 2025-11-10
*.books-production.internal.mercury.com 1 2025-11-10 2025-11-10
staging-pluto.internal.mercury.com 2 2025-10-03 2026-09-03
*.staging-pluto.internal.mercury.com 2 2025-10-03 2026-09-03
staging-master.internal.mercury.com 1 2026-02-15 2026-02-15
*.staging-master.internal.mercury.com 1 2026-02-15 2026-02-15
fe-pr.internal.mercury.com 2 2025-08-19 2026-07-20
*.fe-pr.internal.mercury.com 2 2025-08-19 2026-07-20
logs.internal.mercury.com 1 2025-11-26 2025-11-26
bugs.internal.mercury.com 1 2025-07-16 2025-07-16
tools.internal.mercury.com 1 2026-06-23 2026-06-23
*.tools.internal.mercury.com 1 2026-06-23 2026-06-23
staging-mars.internal.mercury.com 1 2026-02-15 2026-02-15
*.staging-mars.internal.mercury.com 2 2025-08-01 2026-02-15
staging-chariot.internal.mercury.com 1 2025-11-28 2025-11-28
*.staging-chariot.internal.mercury.com 1 2025-11-28 2025-11-28
pentest.internal.mercury.com 1 2026-02-15 2026-02-15
*.pentest.internal.mercury.com 2 2025-08-01 2026-02-15
hub-west.internal.mercury.com 1 2025-11-10 2025-11-10
*.hub-west.internal.mercury.com 1 2025-11-10 2025-11-10
braintrust.internal.mercury.com 1 2026-06-23 2026-06-23
*.braintrust.internal.mercury.com 1 2026-06-23 2026-06-23
sandbox.internal.mercury.com 1 2026-02-15 2026-02-15
books-sandbox.internal.mercury.com 1 2025-11-10 2025-11-10
*.books-sandbox.internal.mercury.com 1 2025-11-10 2025-11-10
*.sandbox.internal.mercury.com 2 2025-08-01 2026-02-15
security.internal.mercury.com 1 2026-01-21 2026-01-21
*.security.internal.mercury.com 1 2026-01-21 2026-01-21
dmz.internal.mercury.com 1 2026-01-30 2026-01-30
*.dmz.internal.mercury.com 1 2026-01-30 2026-01-30
*.pr.dmz.internal.mercury.com 1 2026-06-10 2026-06-10
pr-preview.dmz.internal.mercury.com 1 2026-06-10 2026-06-10
statix.dmz.internal.mercury.com 1 2026-05-15 2026-05-15

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/mercury.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/mercury.com.