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 · 300 ms

HostCertsFirst seenLast seenDNS
mtahq.org 6 2026-02-24 2026-08-11 ok
*.mtahq.org 6 2026-02-24 2026-08-11 —
waftesting.mtahq.org 15 2026-05-06 2026-09-19 nodata
*.waftesting.mtahq.org 15 2026-05-06 2026-09-19 —
gw01.waftesting.mtahq.org 7 2026-07-16 2026-09-13 ok
pac1.waftesting.mtahq.org 4 2026-06-15 2026-06-15 nxdomain
pac2.waftesting.mtahq.org 4 2026-06-15 2026-08-13 ok
camsmobileqa.waftesting.mtahq.org 4 2026-05-06 2026-07-04 nxdomain
sdcontgd.waftesting.mtahq.org 12 2026-05-12 2026-09-07 ok
xff.waftesting.mtahq.org 11 2026-06-02 2026-09-29 ok
mtaig.waftesting.mtahq.org 8 2026-05-12 2026-09-07 ok
hroutcall.waftesting.mtahq.org 10 2026-05-03 2026-08-30 ok
camsmobiletrn.waftesting.mtahq.org 8 2026-05-08 2026-09-04 ok
myaccess-iiq.waftesting.mtahq.org 8 2026-05-10 2026-09-05 ok
mydesktop.gslbext.lirr.waftesting.mtahq.org 2 2026-09-28 2026-09-28 ok
mydevices.waftesting.mtahq.org 10 2026-05-11 2026-09-06 ok
securedesktop.nyct.waftesting.mtahq.org 3 2026-09-30 2026-09-30 ok
securedesktop.gslbext.nyct.waftesting.mtahq.org 4 2026-09-30 2026-09-30 ok
gistest.waftesting.mtahq.org 12 2026-05-23 2026-09-18 ok
drmdev.waftesting.mtahq.org 10 2026-05-13 2026-09-09 ok
ibx.waftesting.mtahq.org 2 2026-08-10 2026-08-10 ok
cloudaz.waftesting.mtahq.org 2 2026-09-08 2026-09-08 ok
autodiscover.mtahq.org 1 2025-08-12 2025-08-12 ok
endpoint.mtahq.org 1 2025-08-12 2025-08-12 ok

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