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.

37 hosts · 281 ms

HostCertsFirst seenLast seenDNS
penair.org 21 2026-05-12 2026-09-07 ok
da.penair.org 6 2026-05-01 2026-08-27 ok
9mra.penair.org 1 2026-05-20 2026-05-20 ok
bhmra.penair.org 4 2026-02-17 2026-09-21 ok
datacard.penair.org 3 2025-07-28 2026-08-11 nodata
online.penair.org 2 2025-06-09 2026-06-11 ok
ise-hq.ise.penair.org 1 2026-05-26 2026-05-26 nxdomain
www.ise-hq.ise.penair.org 1 2026-05-26 2026-05-26 nxdomain
ise-dr.ise.penair.org 1 2026-05-26 2026-05-26 nxdomain
www.ise-dr.ise.penair.org 1 2026-05-26 2026-05-26 nxdomain
estateplanning.penair.org 2 2025-09-23 2026-08-24 ok
marketing.penair.org 10 2026-05-02 2026-08-28 ok
autobuying.penair.org 5 2026-05-13 2026-09-09 ok
cutek.penair.org 2 2025-08-01 2026-07-21 ok
lk.penair.org 2 2025-09-23 2026-08-24 ok
cal.penair.org 1 2026-02-28 2026-02-28 ok
www.cal.penair.org 1 2026-02-28 2026-02-28 nxdomain
admin-portal.penair.org 2 2025-09-08 2026-09-08 ok
lender-portal.penair.org 2 2025-09-08 2026-09-08 ok
borrower-portal.penair.org 2 2025-09-08 2026-09-08 ok
affinity-portal.penair.org 2 2025-09-08 2026-09-08 ok
m.penair.org 7 2026-04-26 2026-08-25 ok
enterpriseregistration.penair.org 4 2026-03-16 2026-09-14 nxdomain
synfo.penair.org 2 2026-03-24 2026-10-05 nxdomain
datacardapp.penair.org 2 2026-05-27 2026-05-27 nxdomain
www.datacardapp.penair.org 2 2026-05-27 2026-05-27 nxdomain
los.penair.org 2 2025-09-08 2026-09-08 ok
members.penair.org 1 2025-11-11 2025-11-11 ok
appointments.penair.org 5 2026-06-04 2026-10-02 ok
sts.penair.org 4 2026-03-16 2026-09-14 ok
certauth.sts.penair.org 4 2026-03-16 2026-09-14 nxdomain
datamart.penair.org 1 2026-04-03 2026-04-03 ok
www.datamart.penair.org 1 2026-04-03 2026-04-03 nxdomain
quickassist.penair.org 1 2026-02-11 2026-02-11 nxdomain
text.penair.org 1 2026-02-13 2026-02-13 ok
www.penair.org 18 2026-05-11 2026-09-06 ok
apply.penair.org 1 2026-04-14 2026-04-14 ok

Programmatic access, with DNS A records: API GET /v1/hosts/penair.org (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/penair.org.