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.

26 hosts · 354 ms

HostCertsFirst seenLast seenDNS
greenstonefcs.com 33 2025-10-13 2026-10-03 ok
*.greenstonefcs.com 16 2026-04-26 2026-10-03 —
secure2.greenstonefcs.com 1 2025-10-15 2025-10-15 nxdomain
secure3.greenstonefcs.com 1 2025-10-15 2025-10-15 nxdomain
secure4.greenstonefcs.com 1 2025-10-15 2025-10-15 nxdomain
secure5.greenstonefcs.com 1 2025-10-15 2025-10-15 ok
billpaybusinessprod.greenstonefcs.com 1 2026-02-24 2026-02-24 nxdomain
billpayprod.greenstonefcs.com 1 2026-01-07 2026-01-07 nxdomain
secure.greenstonefcs.com 1 2025-10-15 2025-10-15 ok
social.greenstonefcs.com 5 2026-05-04 2026-09-13 ok
olbgsadmin.greenstonefcs.com 4 2026-04-13 2026-08-29 ok
cloud.info.greenstonefcs.com 3 2026-03-09 2026-08-10 servfail
image.info.greenstonefcs.com 4 2026-04-09 2026-09-09 ok
click.info.greenstonefcs.com 2 2026-03-02 2026-08-03 ok
view.info.greenstonefcs.com 2 2026-03-02 2026-08-04 ok
jobs.greenstonefcs.com 2 2026-03-11 2026-07-13 ok
chattelsales.greenstonefcs.com 3 2026-06-29 2026-08-27 ok
billpaybusinessuat.greenstonefcs.com 3 2026-02-24 2026-08-14 nxdomain
billpayuat.greenstonefcs.com 1 2026-01-07 2026-01-07 nxdomain
connect.greenstonefcs.com 1 2025-10-07 2025-10-07 nxdomain
edit.greenstonefcs.com 1 2025-10-24 2025-10-24 ok
support.greenstonefcs.com 11 2026-06-02 2026-09-28 ok
ctcsupport.greenstonefcs.com 13 2026-04-11 2026-10-05 ok
itusupport.greenstonefcs.com 11 2026-06-03 2026-09-30 ok
greenstoneintranettest.greenstonefcs.com 3 2026-06-29 2026-08-27 ok
www.greenstonefcs.com 9 2025-10-13 2026-09-20 ok

Programmatic access, with DNS A records: API GET /v1/hosts/greenstonefcs.com (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/greenstonefcs.com.