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.

68 hosts · 341 ms

HostCertsFirst seenLast seenDNS
validity.com 11 2026-03-28 2026-08-28 ok
*.validity.com 6 2025-12-16 2026-09-16 —
static.validity.com 2 2026-05-02 2026-10-02 ok
email.e.validity.com 3 2026-08-11 2026-10-04 ok
everest-stage.validity.com 1 2025-12-09 2025-12-09 ok
*.everest-stage.validity.com 1 2025-12-09 2025-12-09 —
community-stage.validity.com 5 2025-12-15 2026-10-03 ok
*.stage.validity.com 1 2026-02-10 2026-02-10 —
knowledge.stage.validity.com 16 2026-04-15 2026-08-11 ok
knowledge.validity.com 14 2026-05-13 2026-09-09 ok
staging.validity.com 8 2026-04-17 2026-09-18 ok
*.staging.validity.com 2 2026-02-04 2026-09-18 —
everestwalkthrough.validity.com 4 2026-04-16 2026-08-12 ok
click.validity.com 10 2026-04-29 2026-09-26 ok
servicedesk.validity.com 8 2026-04-21 2026-08-18 ok
*.litmus-api-internal.validity.com 1 2025-12-03 2025-12-03 —
*.api-internal.validity.com 2 2026-04-20 2026-09-20 —
mail.validity.com 4 2025-07-03 2026-07-14 ok
www.mail.validity.com 4 2025-07-03 2026-07-14 nxdomain
email.validity.com 1 2025-12-10 2025-12-10 ok
*.email.validity.com 1 2025-12-10 2025-12-10 —
cioemail.validity.com 3 2026-04-27 2026-08-16 ok
login.validity.com 10 2026-05-01 2026-08-27 ok
certification.validity.com 8 2026-04-18 2026-08-15 ok
hello.validity.com 5 2026-04-23 2026-08-17 ok
*.everest-demo.validity.com 2 2026-04-18 2026-09-18 —
preferences.validity.com 10 2026-04-23 2026-09-20 ok
outfitters.validity.com 12 2026-05-18 2026-09-28 ok
verifyslackbot.validity.com 2 2025-06-16 2026-05-16 nxdomain
everest.validity.com 3 2025-12-04 2026-08-28 ok
*.everest.validity.com 5 2025-12-04 2026-08-28 —
*.unstable.everest.validity.com 1 2026-01-17 2026-01-17 —
demo.everest.validity.com 2 2026-03-28 2026-08-28 nxdomain
*.demo.everest.validity.com 2 2026-03-28 2026-08-28 —
developer.everest.validity.com 4 2026-06-06 2026-10-05 ok
*.support.everest.validity.com 1 2026-01-17 2026-01-17 —
*.tst.validity.com 1 2026-02-15 2026-02-15 —
api-internal.tst.validity.com 3 2025-09-23 2026-08-24 ok
litmus-api-internal.tst.validity.com 3 2025-10-23 2025-10-24 ok
*.litmus-api-internal.tst.validity.com 3 2025-10-23 2025-10-24 —
*.api-internal.tst.validity.com 3 2025-09-23 2026-08-24 —
email.tst.validity.com 1 2025-12-13 2025-12-13 nodata
*.email.tst.validity.com 1 2025-12-13 2025-12-13 —
sendercertification.tst.validity.com 1 2025-12-14 2025-12-14 ok
*.sendercertification.tst.validity.com 1 2025-12-14 2025-12-14 —
postmaster.tst.validity.com 2 2025-10-12 2026-09-12 ok
everest.tst.validity.com 3 2025-07-05 2026-06-05 ok
*.everest.tst.validity.com 3 2025-07-05 2026-06-05 —
qa.everest.tst.validity.com 2 2025-07-05 2026-06-05 ok
*.qa.everest.tst.validity.com 2 2025-07-05 2026-06-05 —
canary.everest.tst.validity.com 2 2025-07-05 2026-06-05 ok
*.canary.everest.tst.validity.com 2 2025-07-05 2026-06-05 —
trust.validity.com 8 2026-06-04 2026-09-30 ok
v.validity.com 4 2026-04-20 2026-08-17 ok
dev.validity.com 8 2026-04-17 2026-08-13 ok
www.validity.com 12 2026-04-19 2026-08-28 ok
bv-sandbox.validity.com 2 2026-01-14 2026-01-18 nodata
*.bv-sandbox.validity.com 2 2026-01-14 2026-01-18 —
us-east-1.bv-sandbox.validity.com 1 2026-01-19 2026-01-19 nxdomain
*.us-east-1.bv-sandbox.validity.com 1 2026-01-19 2026-01-19 —
api-internal.bv-sandbox.validity.com 2 2026-02-27 2026-07-30 ok
*.api-internal.bv-sandbox.validity.com 2 2026-02-27 2026-07-30 —
powergridtoday.validity.com 10 2026-04-18 2026-08-14 ok
dupeblockertoday.validity.com 8 2026-04-17 2026-08-13 ok
dtdynamicstoday.validity.com 10 2026-04-17 2026-08-13 ok
demandtoolstoday.validity.com 8 2026-04-18 2026-08-14 ok
peopleimporttoday.validity.com 10 2026-04-18 2026-08-15 ok
mycommunity.validity.com 8 2025-06-18 2026-08-15 ok

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