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.

24 hosts · 309 ms

HostCertsFirst seenLast seenDNS
spectrumcu.org 1 2026-04-16 2026-04-16 ok
joinxa.spectrumcu.org 3 2025-09-24 2025-09-24 nxdomain
mb.spectrumcu.org 2 2025-07-15 2026-07-30 ok
sitefin-preprod.spectrumcu.org 6 2026-02-18 2026-09-04 ok
mortgage.spectrumcu.org 1 2026-01-04 2026-01-04 nodata
mymortgage.spectrumcu.org 1 2026-01-04 2026-01-04 ok
wholesalelending.spectrumcu.org 2 2025-08-26 2026-07-27 ok
onlinebanking.spectrumcu.org 2 2025-07-15 2026-07-30 ok
marketing.spectrumcu.org 3 2025-08-26 2026-08-13 ok
branch-portal.spectrumcu.org 7 2026-05-22 2026-09-17 ok
securemail.spectrumcu.org 1 2026-02-20 2026-02-20 ok
image.sfmail.spectrumcu.org 4 2026-04-02 2026-09-02 ok
click.sfmail.spectrumcu.org 1 2026-01-25 2026-01-25 ok
view.sfmail.spectrumcu.org 2 2026-08-27 2026-08-27 ok
wholesaleadmin.spectrumcu.org 2 2025-08-26 2026-07-27 ok
join.spectrumcu.org 7 2025-06-25 2026-08-30 ok
wires.spectrumcu.org 1 2025-09-16 2025-09-16 ok
loans.spectrumcu.org 8 2026-05-03 2026-08-30 ok
apps.spectrumcu.org 1 2026-01-16 2026-01-16 ok
estmt.spectrumcu.org 3 2025-09-15 2026-09-25 ok
text.spectrumcu.org 2 2025-09-02 2026-08-03 ok
sitefin-dev.spectrumcu.org 12 2026-04-27 2026-09-03 ok
www.spectrumcu.org 13 2026-04-16 2026-08-19 ok
applytoday.spectrumcu.org 5 2026-05-02 2026-08-23 ok

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