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) · 463 ms

HostCertsFirst seenLast seenDNS
bchydro.com 7 2025-09-23 2026-08-11 ok
*.bchydro.com 3 2025-09-23 2025-10-07 —
haqa1.bchydro.com 3 2025-06-24 2026-06-25 ok
w3haqa1.bchydro.com 2 2025-06-24 2026-06-25 nxdomain
remote1.bchydro.com 3 2025-09-23 2026-09-21 ok
vpn1.bchydro.com 3 2025-09-23 2026-09-21 ok
usr1.bchydro.com 1 2025-08-15 2025-08-15 nxdomain
access1.bchydro.com 1 2025-10-07 2025-10-07 ok
sz1.bchydro.com 2 2025-10-27 2025-10-27 ok
www.sz1.bchydro.com 2 2025-10-27 2025-10-27 nxdomain
m-qa2.bchydro.com 4 2026-08-24 2026-09-17 nxdomain
haqa2.bchydro.com 6 2025-08-25 2026-09-17 ok
w3haqa2.bchydro.com 6 2025-08-25 2026-09-17 nxdomain
remote2.bchydro.com 3 2025-09-23 2026-09-21 ok
vpn2.bchydro.com 3 2025-09-23 2026-09-21 ok
uat.app2.bchydro.com 2 2025-07-29 2026-01-23 ok
usr2.bchydro.com 1 2025-08-15 2025-08-15 nxdomain
access2.bchydro.com 1 2025-10-07 2025-10-07 nxdomain
sts2.bchydro.com 2 2025-09-22 2026-09-11 ok
w3f5idev2.bchydro.com 1 2025-06-24 2025-06-24 nxdomain
w3xf5idev2.bchydro.com 1 2025-06-24 2025-06-24 nxdomain
sz2.bchydro.com 2 2025-10-27 2025-10-27 ok
www.sz2.bchydro.com 2 2025-10-27 2025-10-27 nxdomain
access3.bchydro.com 1 2025-10-07 2025-10-07 nxdomain
sz3.bchydro.com 2 2025-10-27 2025-10-27 ok
www.sz3.bchydro.com 2 2025-10-27 2025-10-27 nxdomain
w3f5qa4.bchydro.com 3 2025-06-24 2026-06-16 nxdomain
xf5qa4.bchydro.com 4 2025-06-24 2026-06-16 ok
access4.bchydro.com 1 2025-10-07 2025-10-07 ok
master.xrm365.bchydro.com 1 2025-10-22 2025-10-22 ok
test.xrm365.bchydro.com 1 2025-10-22 2025-10-22 ok
dev.xrm365.bchydro.com 1 2025-10-22 2025-10-22 ok
access5.bchydro.com 1 2025-10-07 2025-10-07 ok
qa1.beta.bchydro.com 1 2025-09-29 2025-09-29 ok
citrixuatcb.bchydro.com 1 2026-02-24 2026-02-24 nxdomain
citrixcb.bchydro.com 1 2026-03-10 2026-03-10 nxdomain
atb.bchydro.com 3 2025-08-11 2025-08-18 nxdomain
evcc.bchydro.com 1 2025-10-17 2025-10-17 ok
vpnddc.bchydro.com 1 2025-09-18 2025-09-18 ok
forward.bchydro.com 5 2026-05-16 2026-09-21 ok
qa1.service.bchydro.com 2 2025-06-24 2026-06-25 ok
qa2.service.bchydro.com 6 2025-08-25 2026-09-17 ok
idev2.service.bchydro.com 1 2025-06-24 2025-06-24 nxdomain
qa4.service.bchydro.com 3 2025-06-24 2026-06-16 nxdomain
idev.service.bchydro.com 1 2025-06-24 2025-06-24 nxdomain
outage.bchydro.com 1 2026-02-26 2026-02-26 ok
edge.bchydro.com 1 2025-10-07 2025-10-07 ok
choose.bchydro.com 6 2026-06-01 2026-09-30 ok
aag.bchydro.com 1 2026-03-10 2026-03-10 ok
vendortraining.bchydro.com 1 2025-07-08 2025-07-08 ok
outlook.bchydro.com 1 2025-10-07 2025-10-07 ok
webmail.bchydro.com 1 2025-10-07 2025-10-07 nodata
email.bchydro.com 5 2026-05-16 2026-09-21 ok
testmail.bchydro.com 1 2025-10-01 2025-10-01 nodata
access1.testmail.bchydro.com 1 2025-10-01 2025-10-01 ok
access2.testmail.bchydro.com 1 2025-10-01 2025-10-01 nxdomain
access3.testmail.bchydro.com 1 2025-10-01 2025-10-01 ok
edge.testmail.bchydro.com 1 2025-10-01 2025-10-01 ok
outlook.testmail.bchydro.com 1 2025-10-01 2025-10-01 ok
webmail.testmail.bchydro.com 1 2025-10-01 2025-10-01 ok
*.emm.testmail.bchydro.com 1 2025-08-19 2025-08-19 —
autodiscover.testmail.bchydro.com 1 2025-10-01 2025-10-01 ok
as.testmail.bchydro.com 1 2025-10-01 2025-10-01 nxdomain
apim.bchydro.com 1 2026-09-22 2026-09-22 ok
qas-sus.apim.bchydro.com 4 2026-08-04 2026-09-08 ok
dev-sus.apim.bchydro.com 2 2026-08-04 2026-08-13 nodata
*.emm.bchydro.com 3 2025-09-22 2026-09-14 —
qa1.4cdn.bchydro.com 2 2025-06-24 2026-06-25 ok
qa2.4cdn.bchydro.com 6 2025-08-25 2026-09-17 ok
idev2.4cdn.bchydro.com 1 2025-06-24 2025-06-24 nxdomain
qa4.4cdn.bchydro.com 3 2025-06-24 2026-06-16 ok
vpn.bchydro.com 3 2025-09-23 2026-09-21 ok
shop.bchydro.com 5 2026-06-06 2026-08-07 ok
qa1.app.bchydro.com 2 2025-06-24 2026-06-25 ok
qa2.app.bchydro.com 6 2025-08-25 2026-09-17 ok
idev2.app.bchydro.com 1 2025-06-24 2025-06-24 nxdomain
qa4.app.bchydro.com 3 2025-06-24 2026-06-16 ok
ssp.bchydro.com 1 2025-11-24 2025-11-24 nxdomain
apigw-dr.bchydro.com 1 2026-03-10 2026-03-10 ok
another.bchydro.com 1 2025-08-26 2025-08-26 nxdomain
summer.bchydro.com 12 2026-06-05 2026-10-01 ok
discoverreceiver.bchydro.com 1 2026-03-10 2026-03-10 nxdomain
autodiscover.bchydro.com 1 2025-10-07 2025-10-07 ok
usr.bchydro.com 1 2025-08-15 2025-08-15 nxdomain
as.bchydro.com 1 2025-10-07 2025-10-07 nxdomain
4cdn.outages.bchydro.com 1 2025-10-07 2025-10-07 ok
qa1outages.bchydro.com 2 2025-06-24 2026-06-25 ok
electricvehicles.bchydro.com 1 2025-07-08 2025-07-08 ok
schools.bchydro.com 4 2025-07-08 2026-10-05 ok
qa-schools.bchydro.com 5 2026-05-24 2026-09-21 ok
stage-schools.bchydro.com 5 2026-05-24 2026-09-22 ok
evnms.bchydro.com 1 2025-10-17 2025-10-17 nodata
maps.bchydro.com 1 2025-07-08 2025-07-08 ok
events.bchydro.com 14 2026-05-10 2026-09-05 ok
citrixaccounts.bchydro.com 1 2026-03-10 2026-03-10 nxdomain
holidays.bchydro.com 11 2026-06-07 2026-10-03 ok
discoverreceiveruat.bchydro.com 1 2026-02-24 2026-02-24 nxdomain
citrixuat.bchydro.com 1 2026-02-24 2026-02-24 ok
remotet.bchydro.com 3 2025-09-23 2026-09-21 ok
listmanagement.bchydro.com 5 2026-04-24 2026-08-21 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/bchydro.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/bchydro.com.