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.

42 hosts · 618 ms

HostCertsFirst seenLast seenDNS
campus.edu 177 2025-08-28 2026-09-20 ok
*.campus.edu 16 2025-08-28 2026-09-20 —
forever21.campus.edu 18 2026-04-21 2026-08-19 ok
dev.forever21.campus.edu 7 2026-04-26 2026-08-22 ok
partnerupload.campus.edu 8 2026-04-08 2026-08-05 ok
e.campus.edu 5 2026-04-24 2026-08-29 ok
aeropostale.campus.edu 18 2026-04-21 2026-08-19 ok
staging.campus.edu 4 2026-04-07 2026-08-13 ok
blog.campus.edu 2 2026-06-19 2026-07-09 ok
ph.campus.edu 4 2026-04-07 2026-08-05 ok
ai.campus.edu 5 2026-05-27 2026-09-27 ok
reebok.campus.edu 18 2026-04-21 2026-08-19 ok
email.campus.edu 5 2026-05-24 2026-09-21 ok
cio-email.campus.edu 3 2026-05-07 2026-08-30 ok
m.campus.edu 4 2026-04-13 2026-08-11 ok
learn.campus.edu 5 2026-04-22 2026-08-20 ok
go.campus.edu 10 2026-04-27 2026-09-23 ok
sacramento.campus.edu 10 2026-04-21 2026-08-17 ok
dev.sacramento.campus.edu 6 2026-04-26 2026-08-22 ok
help.campus.edu 5 2026-05-04 2026-07-02 ok
shop.campus.edu 15 2026-04-23 2026-09-02 ok
account.shop.campus.edu 11 2026-04-22 2026-08-31 ok
tp.campus.edu 2 2026-09-25 2026-09-25 ok
q.campus.edu 3 2026-06-03 2026-08-03 ok
s.campus.edu 5 2026-04-27 2026-08-29 ok
metrics.campus.edu 4 2026-04-21 2026-09-30 ok
wallet.cards.campus.edu 1 2026-09-02 2026-09-02 ok
sms.campus.edu 3 2026-05-07 2026-08-24 ok
surtainscholars.campus.edu 10 2026-04-21 2026-08-17 ok
shaqscholars.campus.edu 10 2026-04-21 2026-08-17 ok
millerscholars.campus.edu 10 2026-04-21 2026-08-17 ok
transfers.campus.edu 6 2026-07-01 2026-08-27 ok
t.campus.edu 5 2026-05-19 2026-09-16 ok
connect.campus.edu 8 2026-04-21 2026-09-20 ok
help.it.campus.edu 2 2025-07-31 2026-07-01 ok
course-copilot.campus.edu 1 2026-02-04 2026-02-04 ok
dev.campus.edu 8 2026-04-26 2026-08-22 ok
s.dev.campus.edu 5 2026-05-03 2026-09-02 ok
www.campus.edu 18 2026-04-21 2026-08-19 ok
pay.campus.edu 8 2026-04-21 2026-08-18 ok
jcpenney.campus.edu 18 2026-04-21 2026-08-19 ok
learn.faculty.campus.edu 5 2026-05-12 2026-09-09 ok

Programmatic access, with DNS A records: API GET /v1/hosts/campus.edu (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/campus.edu.