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.

17 hosts · 315 ms

HostCertsFirst seenLast seenDNS
spotlightpa.org 6 2026-01-13 2026-09-23 ok
*.spotlightpa.org 1 2026-01-13 2026-01-13 —
moreofa.spotlightpa.org 10 2026-05-13 2026-09-10 ok
data.spotlightpa.org 1 2026-01-12 2026-01-12 nodata
*.data.spotlightpa.org 1 2026-01-12 2026-01-12 —
viz-redistricting-2020.data.spotlightpa.org 5 2026-05-15 2026-09-12 ok
viz-sample-ballot-2024.data.spotlightpa.org 5 2026-05-13 2026-09-11 ok
almanack.data.spotlightpa.org 5 2026-04-22 2026-08-20 ok
viz-amendment-tracker.data.spotlightpa.org 4 2026-04-18 2026-08-16 ok
email-alerts.data.spotlightpa.org 5 2026-05-18 2026-09-15 ok
gmailsig.spotlightpa.org 4 2026-06-05 2026-10-03 ok
accessharrisburg.spotlightpa.org 8 2026-06-30 2026-08-28 ok
elink192.mail.spotlightpa.org 8 2026-07-01 2026-08-29 ok
shop.spotlightpa.org 13 2026-04-18 2026-10-01 ok
sources.spotlightpa.org 4 2026-04-14 2026-08-12 ok
mta-sts.spotlightpa.org 4 2026-04-18 2026-08-16 ok
www.spotlightpa.org 5 2026-05-26 2026-09-23 ok

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