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.

27 hosts · 306 ms

HostCertsFirst seenLast seenDNS
nyuhs.org 2 2025-06-30 2026-07-07 ok
vpn1.nyuhs.org 1 2026-02-19 2026-02-19 ok
uhssmtprelay1.nyuhs.org 1 2025-12-18 2025-12-18 ok
www.uhssmtprelay1.nyuhs.org 1 2025-12-18 2025-12-18 ok
vpn2.nyuhs.org 1 2026-02-19 2026-02-19 ok
epd.nyuhs.org 5 2025-09-15 2026-09-14 ok
www.epd.nyuhs.org 5 2025-09-15 2026-09-14 nxdomain
sharefile.nyuhs.org 2 2025-09-23 2026-09-23 servfail
www.sharefile.nyuhs.org 2 2025-09-23 2026-09-23 nxdomain
airstripone.nyuhs.org 1 2025-10-22 2025-10-22 ok
www.airstripone.nyuhs.org 1 2025-10-22 2025-10-22 nxdomain
uhswifi.nyuhs.org 9 2026-06-01 2026-09-29 ok
epiccarelink.nyuhs.org 1 2026-02-10 2026-02-10 ok
www.epiccarelink.nyuhs.org 1 2026-02-10 2026-02-10 nxdomain
vpn.nyuhs.org 1 2026-02-19 2026-02-19 ok
symplrvoip.nyuhs.org 1 2026-04-16 2026-04-16 ok
www.symplrvoip.nyuhs.org 1 2026-04-16 2026-04-16 nxdomain
webapps.nyuhs.org 1 2026-03-05 2026-03-05 ok
www.webapps.nyuhs.org 1 2026-03-05 2026-03-05 nxdomain
intranet.nyuhs.org 3 2026-06-02 2026-08-20 ok
mychart.nyuhs.org 1 2026-02-10 2026-02-10 ok
www.mychart.nyuhs.org 1 2026-02-10 2026-02-10 nxdomain
airstripwebtest.nyuhs.org 3 2025-07-08 2026-07-07 ok
www.airstripwebtest.nyuhs.org 3 2025-07-08 2026-07-07 nxdomain
www.nyuhs.org 2 2025-06-30 2026-07-07 ok
citrix.nyuhs.org 2 2025-09-23 2026-09-23 servfail
www.citrix.nyuhs.org 2 2025-09-23 2026-09-23 nxdomain

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