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.

53 hosts · 436 ms

HostCertsFirst seenLast seenDNS
better.com 19 2025-07-06 2026-10-01 ok
*.better.com 20 2025-07-06 2026-10-01 —
fwtrackfm12.better.com 3 2026-05-13 2026-08-06 ok
rates2.better.com 2 2025-09-16 2026-08-17 ok
pricing-engine-rates2.better.com 2 2026-03-27 2026-08-27 ok
creditkarma.better.com 2 2025-08-20 2026-07-21 ok
staging.creditkarma.better.com 3 2025-08-15 2025-11-06 ok
admin.staging.creditkarma.better.com 2 2025-08-20 2026-07-21 ok
admin.creditkarma.better.com 2 2025-08-20 2026-07-21 ok
uat.creditkarma.better.com 1 2025-11-18 2025-11-18 ok
admin.uat.creditkarma.better.com 1 2025-11-18 2025-11-18 ok
ta.better.com 5 2026-04-25 2026-10-03 ok
prod.better.com 2 2025-09-16 2025-11-07 ok
avd.better.com 2 2026-01-07 2026-05-25 ok
wholesale.better.com 3 2026-08-03 2026-09-22 ok
staging.wholesale.better.com 3 2026-08-03 2026-09-22 ok
admin.staging.wholesale.better.com 1 2026-08-04 2026-08-04 ok
admin.wholesale.better.com 1 2026-08-04 2026-08-04 ok
uat.wholesale.better.com 2 2026-08-05 2026-09-22 ok
admin.uat.wholesale.better.com 1 2026-08-05 2026-08-05 ok
careers-orig.better.com 2 2025-06-20 2026-05-20 nxdomain
staging.better.com 3 2025-08-20 2025-11-06 ok
rates2-staging.better.com 2 2025-09-16 2026-08-17 ok
pricing-engine-rates2-staging.better.com 2 2026-03-25 2026-08-25 ok
ally-staging.better.com 3 2025-08-20 2025-08-20 nxdomain
go.staging.better.com 2 2026-08-26 2026-08-26 ok
track.emailoutreach.better.com 3 2026-07-07 2026-09-05 ok
fwtrack.better.com 5 2026-04-26 2026-08-24 ok
go.better.com 4 2026-04-18 2026-08-27 ok
nerdio.better.com 2 2026-01-07 2026-05-25 ok
staging.idp.better.com 3 2025-08-11 2025-08-12 nxdomain
ci.idp.better.com 1 2025-08-19 2025-08-19 nxdomain
dr.better.com 2 2025-07-14 2025-08-20 nxdomain
www.labs.better.com 2 2026-05-11 2026-05-11 nxdomain
track.messages.better.com 3 2026-07-07 2026-09-05 ok
track.rates.better.com 3 2026-07-07 2026-09-05 ok
links.better.com 1 2026-07-06 2026-07-06 ok
track.emails.better.com 3 2026-07-07 2026-09-05 ok
careers.better.com 2 2025-06-20 2026-05-20 ok
interviewers.better.com 1 2025-11-30 2025-11-30 nodata
investors.better.com 6 2026-04-30 2026-08-20 ok
widgets.better.com 2 2025-07-27 2025-10-27 nxdomain
uat.better.com 3 2025-06-30 2025-11-06 ok
rates2-uat.better.com 2 2025-10-02 2026-09-02 ok
go.uat.better.com 2 2026-08-26 2026-08-26 ok
trust.better.com 7 2026-07-28 2026-09-25 ok
www.better.com 2 2025-06-24 2026-05-25 ok
*.sandbox.better.com 2 2025-08-16 2026-07-16 —
betterdown.sandbox.better.com 2 2025-08-16 2026-07-16 ok
track.mailbox.better.com 3 2026-07-07 2026-09-05 ok
home-giveaway.better.com 4 2026-04-16 2026-08-18 ok
ally.better.com 4 2025-09-17 2025-09-17 nxdomain
lp.quiz.better.com 10 2026-05-07 2026-09-02 ok

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