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.

40 hosts · 370 ms

HostCertsFirst seenLast seenDNS
aapa.org 1 2026-01-06 2026-01-06 ok
*.aapa.org 1 2026-01-06 2026-01-06 —
sb1.aapa.org 12 2026-04-17 2026-08-13 ok
sb2.aapa.org 16 2026-04-19 2026-08-15 ok
info2.aapa.org 4 2026-04-09 2026-08-27 ok
sb3.aapa.org 14 2026-05-10 2026-09-06 ok
url1125.aapa.org 2 2026-09-17 2026-09-17 ok
pajobsource.aapa.org 1 2025-12-17 2025-12-17 ok
resources.pajobsource.aapa.org 4 2026-06-04 2026-10-02 ok
engage.aapa.org 9 2026-04-19 2026-09-15 ok
cme.aapa.org 10 2026-04-07 2026-09-30 ok
messaging.aapa.org 2 2026-03-22 2026-07-18 ok
pamessaging.aapa.org 2 2026-03-22 2026-07-18 ok
pajobsource.staging.aapa.org 1 2025-12-17 2025-12-17 ok
tracking.aapa.org 4 2026-04-09 2026-08-27 ok
preceptor-network.aapa.org 5 2026-05-01 2026-08-29 ok
helpdesk.aapa.org 12 2026-04-27 2026-08-23 ok
cisionone-email.aapa.org 5 2026-05-20 2026-09-17 ok
vpn.aapa.org 5 2026-09-19 2026-09-19 ok
app.aapa.org 5 2026-05-16 2026-09-17 ok
beta.app.aapa.org 5 2026-05-24 2026-09-26 ok
clerk.app.aapa.org 8 2026-05-25 2026-09-20 ok
accounts.app.aapa.org 10 2026-05-25 2026-09-20 ok
careerpartner.aapa.org 1 2026-05-26 2026-05-26 ok
pajobs.aapa.org 1 2026-09-17 2026-09-17 ok
cms.aapa.org 4 2026-08-14 2026-08-14 ok
app.assets.aapa.org 4 2026-04-09 2026-08-27 ok
images.assets.aapa.org 8 2026-05-21 2026-07-30 ok
fonts.aapa.org 2 2026-08-09 2026-08-09 ok
mta-sts.aapa.org 2 2026-05-30 2026-08-09 ok
status.aapa.org 5 2026-05-15 2026-09-12 ok
it-status.aapa.org 5 2026-05-19 2026-09-16 ok
email.news.aapa.org 5 2026-04-22 2026-08-20 ok
test-connect.aapa.org 4 2026-07-30 2026-07-30 ok
support.aapa.org 2 2026-08-10 2026-08-10 ok
cmetest.aapa.org 15 2026-06-04 2026-09-30 ok
testwww.aapa.org 12 2026-05-31 2026-09-27 ok
devwww.aapa.org 10 2026-05-30 2026-09-25 ok
survey.aapa.org 6 2026-05-12 2026-09-29 ok
community.aapa.org 18 2026-05-11 2026-09-29 ok

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