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.

37 hosts · 298 ms

HostCertsFirst seenLast seenDNS
owa10.sapphiretech.com 2 2025-06-26 2026-07-20 ok
ucupdates-r2.sapphiretech.com 8 2026-05-11 2026-07-27 nxdomain
us2.sapphiretech.com 5 2026-05-04 2026-09-21 ok
pop3.sapphiretech.com 1 2025-06-26 2025-06-26 nxdomain
rma.sapphiretech.com 2 2026-04-14 2026-05-14 ok
owa.sapphiretech.com 2 2025-06-26 2026-07-20 ok
webconf.sapphiretech.com 6 2026-05-11 2026-07-27 ok
wifi.sapphiretech.com 1 2026-05-06 2026-05-06 nxdomain
rdcb.hk.sapphiretech.com 1 2026-02-24 2026-02-24 nxdomain
ts.hk.sapphiretech.com 1 2026-02-24 2026-02-24 nxdomain
lexws.hk.sapphiretech.com 8 2026-05-11 2026-07-27 ok
asia.dl.sapphiretech.com 5 2026-05-04 2026-09-21 ok
cn.dl.sapphiretech.com 5 2026-05-04 2026-09-21 ok
us.dl.sapphiretech.com 5 2026-05-04 2026-09-21 ok
hkdl.sapphiretech.com 5 2026-05-04 2026-09-21 ok
www.sccm.sapphiretech.com 2 2025-07-30 2026-07-20 ok
bom.sapphiretech.com 1 2026-04-14 2026-04-14 ok
dialin.sapphiretech.com 8 2026-05-11 2026-07-27 ok
imap.sapphiretech.com 1 2025-06-26 2025-06-26 nxdomain
sip.sapphiretech.com 6 2026-05-11 2026-07-27 ok
smtp.sapphiretech.com 2 2025-06-26 2026-07-20 ok
ts21.hq.sapphiretech.com 1 2026-02-24 2026-02-24 nxdomain
ts22.hq.sapphiretech.com 1 2026-02-24 2026-02-24 nxdomain
ts23.hq.sapphiretech.com 1 2026-02-24 2026-02-24 nxdomain
rdcb.hq.sapphiretech.com 1 2026-02-24 2026-02-24 nxdomain
ts.hq.sapphiretech.com 1 2026-02-24 2026-02-24 nxdomain
owahq.sapphiretech.com 2 2025-06-26 2026-07-20 ok
lyncdiscover.sapphiretech.com 8 2026-05-11 2026-07-27 ok
autodiscover.sapphiretech.com 2 2025-06-26 2026-07-20 ok
mta-sts.sapphiretech.com 6 2026-05-14 2026-10-01 ok
us.sapphiretech.com 5 2026-05-04 2026-09-21 ok
meet.sapphiretech.com 8 2026-05-11 2026-07-27 ok
support.sapphiretech.com 1 2026-05-11 2026-05-11 ok
av.sapphiretech.com 6 2026-05-11 2026-07-27 ok
webservice.tw.sapphiretech.com 6 2026-04-14 2026-10-05 ok
wifi.tw.sapphiretech.com 1 2026-01-26 2026-01-26 nxdomain
www.sapphiretech.com 7 2025-07-30 2026-07-22 ok

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