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) · 890 ms

HostCertsFirst seenLast seenDNS
microsoft.com 45 2025-07-21 2026-10-01 ok
ecsex-test-0.microsoft.com 71 2026-01-14 2026-08-28 ok
ecsex-dev-0.microsoft.com 447 2026-01-12 2026-10-07 ok
ecsex-dev-10.microsoft.com 857 2026-01-15 2026-10-07 ok
bgaappsvc10.microsoft.com 8 2026-01-13 2026-09-29 ok
2090caf3-e02d-4034-9a9a-073b728d2530.microsoft.com 6 2026-02-01 2026-08-26 nxdomain
861cda8e-16d0-4df9-800c-47f3bc302440.microsoft.com 6 2026-01-30 2026-08-28 nxdomain
entra360.microsoft.com 681 2026-01-10 2026-10-03 ok
engage360.microsoft.com 3 2026-05-15 2026-09-29 ok
partnerstaffing360.microsoft.com 16 2026-02-20 2026-10-04 ok
monitoring360.microsoft.com 5 2026-01-21 2026-06-10 ok
ai360.microsoft.com 7 2026-08-19 2026-09-27 ok
feedback360.microsoft.com 2 2026-02-04 2026-06-20 ok
api.feedback360.microsoft.com 1 2026-05-28 2026-05-28 ok
action360.microsoft.com 2 2026-02-26 2026-07-07 ok
customer360.microsoft.com 3 2026-05-20 2026-09-30 ok
dsas360.microsoft.com 4 2026-01-25 2026-01-26 nxdomain
iamps360.microsoft.com 2 2026-03-02 2026-07-15 ok
trust360.microsoft.com 2 2026-01-31 2026-06-17 ok
catalog.trust360.microsoft.com 4 2026-04-02 2026-08-29 ok
privacy.trust360.microsoft.com 8 2026-08-29 2026-08-30 nxdomain
security360.microsoft.com 4 2026-02-07 2026-09-22 ok
bf4fb4b9-c1cc-4562-881a-130455c26b80.microsoft.com 1 2026-01-22 2026-01-22 nxdomain
2d528172-1f8c-4d25-9bcc-6512de3228a0.microsoft.com 1 2026-01-16 2026-01-16 nxdomain
msrhub0.microsoft.com 8 2026-05-20 2026-09-27 ok
*.msrhub0.microsoft.com 7 2026-05-21 2026-09-27 —
azts-ring0.microsoft.com 9 2026-01-24 2026-08-26 ok
rhui4-1.microsoft.com 22 2026-02-17 2026-08-29 ok
cdn-dynmedia-1.microsoft.com 4 2025-09-22 2026-09-14 ok
rhui-1.microsoft.com 22 2026-02-17 2026-08-29 ok
ecsex-dev-1.microsoft.com 423 2026-01-13 2026-10-07 ok
fdeplatformafad001.microsoft.com 10 2026-02-04 2026-08-28 ok
fdeplatformafap001.microsoft.com 4 2026-02-04 2026-08-28 ok
fdeplatformafau001.microsoft.com 4 2026-02-04 2026-08-28 ok
securityscanningservices-tme01.microsoft.com 18 2026-06-24 2026-09-30 ok
ak-secure01.microsoft.com 2 2025-12-23 2026-02-25 nxdomain
cseosmtp01.microsoft.com 1 2026-01-29 2026-01-29 ok
neat-api.pmehlsdlz01.microsoft.com 10 2026-02-08 2026-08-29 ok
neat.pmehlsdlz01.microsoft.com 21 2026-02-08 2026-08-29 ok
ecsex-dev-11.microsoft.com 427 2026-01-21 2026-10-07 ok
mps-dex-prd-eus2-611.microsoft.com 1317 2026-01-20 2026-10-06 ok
mps-dex-can-eus2-611.microsoft.com 766 2026-01-18 2026-10-06 ok
mps-dex-prd-aec0a-611.microsoft.com 565 2026-01-29 2026-10-06 ok
mps-dex-prd-inc0a-611.microsoft.com 144 2026-09-11 2026-10-06 ok
mps-dex-prd-aen0a-611.microsoft.com 572 2026-01-29 2026-10-06 ok
mps-dex-prd-ins0a-611.microsoft.com 144 2026-09-11 2026-10-06 ok
mps-dex-prd-aue-611.microsoft.com 1244 2026-01-29 2026-10-06 ok
mps-dex-prd-uks-611.microsoft.com 1268 2026-01-20 2026-10-06 ok
mps-dex-prd-aus-611.microsoft.com 1244 2026-01-29 2026-10-06 ok
mps-dex-prd-cus-611.microsoft.com 1307 2026-01-20 2026-10-06 ok
mps-dex-can-cus-611.microsoft.com 771 2026-01-18 2026-10-06 ok
mps-dex-prd-neu-611.microsoft.com 1282 2026-01-20 2026-10-06 ok
mps-dex-prd-weu-611.microsoft.com 1282 2026-01-20 2026-10-06 ok
mps-dex-prd-ukw-611.microsoft.com 1268 2026-01-20 2026-10-06 ok
dciarcadeclient2021.microsoft.com 6 2026-01-23 2026-08-29 nxdomain
dusqui001sbc51.microsoft.com 15 2026-02-13 2026-08-29 ok
duschy644sbc51.microsoft.com 15 2026-02-13 2026-08-29 ok
diedubgrasbc51.microsoft.com 14 2026-02-13 2026-08-28 ok
dinhydhydsbc51.microsoft.com 15 2026-02-13 2026-08-28 ok
dsgsinwoosbc51.microsoft.com 17 2026-02-12 2026-08-29 ok
ffc72a71-b017-45f6-aed2-97d35f9ac161.microsoft.com 8 2026-01-22 2026-08-27 nxdomain
08dbb1e2-14d0-4668-a751-5e89b2ecdc61.microsoft.com 1 2026-04-06 2026-04-06 nxdomain
mbs2-U1.microsoft.com 6 2026-01-19 2026-08-29 —
mbsinternal-U1.microsoft.com 6 2026-01-19 2026-08-29 —
identitypass-web1.microsoft.com 1 2026-01-13 2026-01-13 —
c1.microsoft.com 15 2026-02-19 2026-09-23 ok
asia.c1.microsoft.com 15 2026-02-19 2026-09-23 ok
europe.c1.microsoft.com 15 2026-02-19 2026-09-23 ok
us-central.c1.microsoft.com 15 2026-02-19 2026-09-23 ok
us-east.c1.microsoft.com 15 2026-02-19 2026-09-23 ok
us-west.c1.microsoft.com 15 2026-02-19 2026-09-23 ok
bgaappsvc1.microsoft.com 8 2026-01-14 2026-09-29 ok
9a22d1fb-719d-477b-a6da-490c8a21f6d1.microsoft.com 14 2026-04-12 2026-08-29 nxdomain
notice1.microsoft.com 1 2026-01-29 2026-01-29 ok
m.notice1.microsoft.com 1 2026-01-29 2026-01-29 ok
res.notice1.microsoft.com 1 2026-01-29 2026-01-29 ok
t.notice1.microsoft.com 1 2026-01-29 2026-01-29 ok
gptjudge1.microsoft.com 3 2026-02-06 2026-09-22 ok
hrprofileppe1.microsoft.com 6 2026-02-16 2026-08-28 ok
azts-ring1.microsoft.com 9 2026-01-23 2026-08-26 ok
tapmsratelemetrydebug1.microsoft.com 3 2026-01-23 2026-04-15 nxdomain
amupdatedl1.microsoft.com 4 2026-01-27 2026-09-10 nxdomain
lva1-msft-dr1.microsoft.com 10 2026-02-06 2026-10-06 ok
lse1-msft-dr1.microsoft.com 10 2026-02-06 2026-10-06 ok
eam1-msft-dr1.microsoft.com 9 2026-02-06 2026-10-05 ok
ltx1-msft-dr1.microsoft.com 10 2026-02-06 2026-10-06 ok
efr5-msft-dr1.microsoft.com 10 2026-02-06 2026-10-06 ok
licensing-uat1.microsoft.com 92 2026-01-11 2026-08-29 ok
tsportuat1.microsoft.com 8 2026-01-13 2026-08-29 ok
tssrvuat1.microsoft.com 7 2026-01-13 2026-08-29 ok
fluent1.microsoft.com 7 2026-01-19 2026-08-26 ok
mbsupdates-u1.microsoft.com 5 2026-01-19 2026-08-29 ok
smcws16u1.microsoft.com 5 2026-03-30 2026-08-28 ok
benefitsnow16u1.microsoft.com 5 2026-04-04 2026-08-28 ok
vlscu1.microsoft.com 7 2026-01-13 2026-08-28 ok
vlscsvcu1.microsoft.com 7 2026-01-13 2026-08-28 ok
vlcmu1.microsoft.com 7 2026-04-08 2026-09-22 ok
contracts.vlcmu1.microsoft.com 7 2026-04-07 2026-08-28 ok
templatesvlcmu1.microsoft.com 7 2026-04-08 2026-09-23 ok
contractsvlcmu1.microsoft.com 6 2026-04-04 2026-08-28 nxdomain

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/microsoft.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/microsoft.com.