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.

32 hosts · 316 ms

HostCertsFirst seenLast seenDNS
arb.bank 25 2026-04-11 2026-10-05 ok
*.arb.bank 15 2026-04-16 2026-08-24 —
s3.arb.bank 10 2026-04-10 2026-10-05 ok
21902856.arb.bank 14 2026-04-11 2026-10-05 ok
creditcard.arb.bank 14 2026-04-11 2026-10-05 ok
core.arb.bank 17 2026-04-12 2026-10-06 ok
secure.arb.bank 13 2026-04-11 2026-10-06 ok
corporate.arb.bank 14 2026-04-12 2026-10-06 ok
archive.arb.bank 11 2026-04-11 2026-10-05 ok
commercial.arb.bank 14 2026-04-11 2026-10-05 ok
portal.arb.bank 13 2026-04-11 2026-10-05 ok
securemail.arb.bank 15 2026-04-11 2026-10-05 ok
enroll.arb.bank 17 2026-04-11 2026-10-05 ok
sso.arb.bank 1 2026-07-02 2026-07-02 ok
www.sso.arb.bank 1 2026-07-02 2026-07-02 nxdomain
sop.arb.bank 3 2026-02-19 2026-10-03 ok
meetings.arb.bank 17 2026-04-11 2026-10-05 ok
links.arb.bank 12 2026-04-11 2026-10-05 ok
sponsorships.arb.bank 14 2026-04-12 2026-10-06 ok
careers.arb.bank 13 2026-04-11 2026-10-05 ok
news.arb.bank 15 2026-04-11 2026-10-05 ok
contact.arb.bank 11 2026-04-11 2026-10-05 ok
reset.arb.bank 11 2026-04-10 2026-10-05 ok
management.arb.bank 8 2026-04-10 2026-10-05 ok
annualreport.arb.bank 8 2026-04-13 2026-08-09 ok
support.arb.bank 8 2026-04-11 2026-10-05 ok
list.arb.bank 10 2026-04-13 2026-08-09 ok
new.arb.bank 8 2026-05-19 2026-09-14 ok
www.arb.bank 10 2026-04-13 2026-08-10 ok
survey.arb.bank 13 2026-04-11 2026-10-06 ok
calpoly.arb.bank 11 2026-04-11 2026-10-05 ok
apply.arb.bank 2 2026-08-17 2026-08-17 ok

Programmatic access, with DNS A records: API GET /v1/hosts/arb.bank (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/arb.bank.