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.

100 hosts (first page) · 407 ms

HostCertsFirst seenLast seenDNS
hm.com 11 2025-09-16 2026-09-23 ok
*.hm.com 4 2025-09-16 2026-07-21 —
wd-s10.hm.com 3 2026-02-27 2026-03-11 nxdomain
www.wd-s10.hm.com 3 2026-02-27 2026-03-11 nxdomain
wd-t10.hm.com 1 2026-05-06 2026-05-06 nxdomain
www.wd-t10.hm.com 1 2026-05-06 2026-05-06 nxdomain
wd-s40.hm.com 1 2026-02-11 2026-02-11 nxdomain
www.wd-s40.hm.com 1 2026-02-11 2026-02-11 nxdomain
wd-e90.hm.com 1 2026-06-24 2026-06-24 nxdomain
www.wd-e90.hm.com 1 2026-06-24 2026-06-24 nxdomain
wd-ul0.hm.com 1 2026-03-20 2026-03-20 nxdomain
www.wd-ul0.hm.com 1 2026-03-20 2026-03-20 nxdomain
wd-tr0.hm.com 1 2026-04-20 2026-04-20 nxdomain
www.wd-tr0.hm.com 1 2026-04-20 2026-04-20 nxdomain
SP1EASSF01.hm.com 2 2026-02-11 2026-02-12 —
SP1SCSSF01.hm.com 2 2026-02-11 2026-02-12 —
SP1USSSF01.hm.com 2 2026-02-11 2026-02-12 —
SP1HUB1TSF01.hm.com 2 2026-01-20 2026-01-22 —
cINFPRXNPRCI01.hm.com 2 2026-03-19 2026-09-03 —
sp1eascc01.hm.com 1 2026-06-08 2026-06-08 nxdomain
sp1scscc01.hm.com 1 2026-06-08 2026-06-08 nxdomain
sp1usscc01.hm.com 1 2026-06-08 2026-06-08 nxdomain
Hybrid1.hm.com 2 2025-11-03 2026-01-13 —
hm-akamai-san1.hm.com 2 2025-09-25 2026-07-29 nxdomain
wd-sr1.hm.com 1 2026-06-24 2026-06-24 nxdomain
www.wd-sr1.hm.com 1 2026-06-24 2026-06-24 nxdomain
sts1.hm.com 1 2026-03-26 2026-03-26 ok
www.sts1.hm.com 1 2026-03-26 2026-03-26 nxdomain
SP1EASSF02.hm.com 2 2026-02-11 2026-02-12 —
SP1SCSSF02.hm.com 2 2026-02-11 2026-02-12 —
SP1USSSF02.hm.com 2 2026-02-11 2026-02-12 —
SP1HUB1TSF02.hm.com 2 2026-01-20 2026-01-22 —
cINFPRXNPRCI02.hm.com 2 2026-03-19 2026-09-03 —
sp1eascc02.hm.com 1 2026-06-08 2026-06-08 nxdomain
sp1scscc02.hm.com 1 2026-06-08 2026-06-08 nxdomain
sp1usscc02.hm.com 1 2026-06-08 2026-06-08 nxdomain
smtp-hub2.hm.com 1 2026-04-28 2026-04-28 nxdomain
Hybrid2.hm.com 2 2025-11-03 2026-01-13 —
m2.hm.com 5 2025-09-25 2026-07-30 ok
de2-m2.hm.com 8 2025-09-16 2026-09-07 ok
o2d-m2.hm.com 8 2025-09-16 2026-09-07 ok
pfd-m2.hm.com 8 2025-09-16 2026-09-07 ok
trn-m2.hm.com 8 2025-09-16 2026-09-07 ok
o2t-m2.hm.com 8 2025-09-16 2026-09-07 ok
int-m2.hm.com 8 2025-09-16 2026-09-07 ok
perftest-m2.hm.com 8 2025-09-16 2026-09-07 ok
tst-m2.hm.com 8 2025-09-16 2026-09-07 ok
lp2.hm.com 5 2025-09-25 2026-07-30 ok
app2.hm.com 5 2025-09-25 2026-07-30 ok
de2-app2.hm.com 8 2025-09-16 2026-09-07 ok
o2d-app2.hm.com 8 2025-09-16 2026-09-07 ok
pfd-app2.hm.com 8 2025-09-16 2026-09-07 ok
trn-app2.hm.com 8 2025-09-16 2026-09-07 ok
o2t-app2.hm.com 8 2025-09-16 2026-09-07 ok
int-app2.hm.com 8 2025-09-16 2026-09-07 ok
perftest-app2.hm.com 8 2025-09-16 2026-09-07 ok
tst-app2.hm.com 8 2025-09-16 2026-09-07 ok
smtp2.hm.com 1 2026-04-28 2026-04-28 nxdomain
vardev2.hm.com 1 2026-03-30 2026-03-30 ok
www.vardev2.hm.com 1 2026-03-30 2026-03-30 nxdomain
www2.hm.com 5 2025-09-25 2026-07-30 ok
de2-www2.hm.com 8 2025-09-16 2026-09-07 ok
ionpoc-www2.hm.com 5 2025-09-16 2026-08-12 nxdomain
o2d-www2.hm.com 8 2025-09-16 2026-09-07 ok
pfd-www2.hm.com 8 2025-09-16 2026-09-07 ok
trn-www2.hm.com 8 2025-09-16 2026-09-07 ok
o2t-www2.hm.com 8 2025-09-16 2026-09-07 ok
int-www2.hm.com 8 2025-09-16 2026-09-07 ok
perftest-www2.hm.com 8 2025-09-16 2026-09-07 ok
tst-www2.hm.com 8 2025-09-16 2026-09-07 ok
SP1EASSF03.hm.com 2 2026-02-11 2026-02-12 —
SP1SCSSF03.hm.com 1 2026-02-11 2026-02-11 —
SP1USSSF03.hm.com 2 2026-02-11 2026-02-12 —
sp1eascc03.hm.com 1 2026-06-08 2026-06-08 nxdomain
sp1scscc03.hm.com 1 2026-06-08 2026-06-08 nxdomain
sp1usscc03.hm.com 1 2026-06-08 2026-06-08 nxdomain
wd-q93.hm.com 1 2026-04-20 2026-04-20 nxdomain
www.wd-q93.hm.com 1 2026-04-20 2026-04-20 nxdomain
smtp-hub3.hm.com 1 2026-04-28 2026-04-28 nxdomain
helpdesk3.hm.com 1 2026-01-20 2026-01-20 nxdomain
www.helpdesk3.hm.com 1 2026-01-20 2026-01-20 nxdomain
pop3.hm.com 1 2026-04-28 2026-04-28 nxdomain
vardev3.hm.com 1 2026-04-27 2026-04-27 ok
www.vardev3.hm.com 1 2026-04-27 2026-04-27 nxdomain
SP1EASSF04.hm.com 1 2026-02-11 2026-02-11 —
SP1SCSSF04.hm.com 2 2026-02-11 2026-02-12 —
SP1USSSF04.hm.com 1 2026-02-11 2026-02-11 —
MailGW4.hm.com 2 2025-11-03 2025-11-09 —
Mailgw4.hm.com 1 2025-11-09 2025-11-09 —
srv16075.hm.com 1 2026-09-03 2026-09-03 nxdomain
www.srv16075.hm.com 1 2026-09-03 2026-09-03 nxdomain
MailGW5.hm.com 2 2025-11-03 2025-11-09 —
mailgw5.hm.com 1 2025-11-09 2025-11-09 ok
cINFPRXNPRCI.hm.com 2 2026-03-19 2026-09-03 —
storeemea.hm.com 2 2026-02-11 2026-02-12 nxdomain
hmema.hm.com 1 2025-09-16 2025-09-16 nxdomain
www.hmema.hm.com 1 2025-09-16 2025-09-16 nxdomain
prd-grafana.hm.com 1 2026-05-20 2026-05-20 nxdomain
qa.hm.com 10 2026-05-29 2026-09-24 ok
data.qa.hm.com 5 2026-05-17 2026-09-10 ok

Showing the first 100 hostnames — sign in with GitHub or Google to page the full list, or use the API with an API key: GET /v1/hosts/hm.com.

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/hm.com.