Check-Host.cc

Domain

core.microsoft

Aggregated from public BGP, CT logs, our scan layer, honeypots and global probes.

Run a live full scan of core.microsoft

On-demand: ports, banners, TLS, tech-stack, subdomains and origin/IP-leak detection. Results are shared publicly for everyone to link to.

Deep-scan now
Hosting IPs
488
A/AAAA targets
Subdomains
1,149
CT + scan + body
Record Types
3
seen in DNS
Observed Certs
in our scans

DNS Records

A
AAAA
MX
NS
ns1-33.azure-dns.com, ns2-33.azure-dns.net, ns3-33.azure-dns.org, ns4-33.azure-dns.info
TXT
MS=ms76478040, v=spf1 -all
CNAME
CAA
0 contactemail "caarecordaware@microsoft.com", 0 iodef "mailto:caarecordaware@microsoft.com", 0 issue "digicert.com", 0 issue "microsoft.com"

WHOIS / Registration

Registration data planned

Registrar, creation/expiry dates and domain status via RDAP. Rolling out gradually — bulk WHOIS is rate-limited, so we resolve on a prioritized cadence.

Subdomains

Every subdomain we know about — harvested from CT-log SANs, scan-observed certs and HTML body references — paired with its current A/AAAA target.

Subdomain Resolves to Last seen
prod.ued.core.microsoft 2026-07-28 10:59:00.670
authorization.identity.core.microsoft 2026-07-28 11:08:40.176
intune.prod.ued.core.microsoft 2026-07-28 10:59:00.670
prod.registrar.communications.core.microsoft 2026-07-28 20:39:29.599
substrate.svc.core.microsoft 2026-07-23 07:18:54.603
api-workerrole.tdf.crosstenantmms.teams.core.microsoft 2026-06-20 11:40:15.510
slideanalysis.core.microsoft 2026-07-25 06:15:36.530
api-webrole.tdf.crosstenantmms.teams.core.microsoft 2026-06-20 11:40:15.510
dev02.partnerportal.teams.core.microsoft 2026-07-28 12:35:28.535
index.textanalysis.core.microsoft 2026-07-28 13:22:58.632
marketwatch.core.microsoft 2026-07-21 09:30:34.743
dev01.partnerportal.teams.core.microsoft 2026-07-28 12:35:28.535
dev03.partnerportal.teams.core.microsoft 2026-07-28 12:35:28.535
intune.canary.ued.core.microsoft 2026-07-28 15:23:59.929
canary.ued.core.microsoft 2026-07-28 15:23:59.929
ans.messaging.core.microsoft 2026-07-28 07:00:33.211
df.ans.messaging.core.microsoft 2026-07-28 07:00:33.211
sacs.core.microsoft 2026-07-26 17:56:24.590
afd.northeurope.sdf.syntexrp.core.microsoft 2026-06-18 15:00:39.694
afd.southafricanorth.prod.syntexrp.core.microsoft 2026-06-19 20:47:45.632
afd.uaenorth.prod.syntexrp.core.microsoft 2026-06-20 05:13:24.451
cdn.config.centro.core.microsoft 2026-06-23 02:26:43.735
config.centro.core.microsoft 2026-07-28 09:41:22.792
copilot-connectors.core.microsoft 2026-06-20 10:49:08.801
df.copilot-connectors.core.microsoft 2026-06-20 10:49:08.801
dogfood.ued.core.microsoft 2026-07-28 10:59:00.670
icms.contentloc.core.microsoft 2026-06-17 15:31:41.167
int.marketwatch.core.microsoft 2026-07-28 11:36:15.163
revocation.core.microsoft 2026-07-26 17:13:03.300
slideinfoworker.slideanalysis.core.microsoft 2026-07-25 06:15:36.530
textanalysis.core.microsoft 2026-07-28 13:22:58.632
authorization.foundational.identity.core.microsoft 2026-07-17 16:17:23.228
gcc.ued.core.microsoft 2026-07-20 08:17:01.502
llmmeteringapi.core.microsoft 2026-07-25 02:44:41.834
pptwrs.core.microsoft 2026-07-22 23:47:15.185
sdf.substrate.svc.core.microsoft 2026-07-23 07:18:54.603
tca.teams.core.microsoft 2026-07-28 04:00:32.430
afd.australiasoutheast.prod.syntexrp.core.microsoft 2026-06-18 09:39:15.838
afd.canadacentral.prod.syntexrp.core.microsoft 2026-06-19 20:47:45.632
afd.common.test.syntexrp.core.microsoft 2026-06-18 15:00:39.694
afd.eastasia.prod.syntexrp.core.microsoft 2026-06-19 20:25:09.479
afd.eastus.test.syntexrp.core.microsoft 2026-06-20 04:28:12.719
afd.northcentralus.prod.syntexrp.core.microsoft 2026-06-19 20:29:28.347
afd.uksouth.prod.syntexrp.core.microsoft 2026-06-18 09:39:15.838
afd.westeurope.test.syntexrp.core.microsoft 2026-06-19 21:15:39.560
afd.westus.prod.syntexrp.core.microsoft 2026-06-19 20:51:40.444
afd.westus.test.syntexrp.core.microsoft 2026-06-18 15:00:39.694
api-int.marketwatch.core.microsoft 2026-07-28 15:04:37.256
api-prod-noam.biometricsvc.teams.core.microsoft 2026-07-19 05:49:02.105
api.marketwatch.core.microsoft 2026-06-20 05:04:00.119
api.rating.core.microsoft 2026-07-26 10:46:00.019
api.risedt.m365.core.microsoft 2026-06-17 18:07:01.993
api.siufauthoring.core.microsoft 2026-07-27 08:31:52.430
apm-accounts-api.core.microsoft 2026-06-18 19:56:42.909
asse.msit.appsuggestions.teams.core.microsoft 2026-07-21 17:35:39.428
css.cprod.officeshell.core.microsoft 2026-07-19 14:51:58.173
ctms.core.microsoft 2026-06-22 04:10:10.067
devc.presence.communications.core.microsoft 2026-07-25 04:34:47.921
devcrem.presence.communications.core.microsoft 2026-07-25 04:34:47.921
deve.presence.communications.core.microsoft 2026-07-26 09:10:48.160
deverem.presence.communications.core.microsoft 2026-07-26 09:10:48.160
df.pptwrs.core.microsoft 2026-07-22 23:47:15.185
entitlement.teams.core.microsoft 2026-07-26 04:05:32.050
inte.presence.communications.core.microsoft 2026-07-26 09:10:48.160
intelligence-gw-prodnoam.dmmars.teams.core.microsoft 2026-07-24 12:43:12.521
interem.presence.communications.core.microsoft 2026-07-26 09:10:48.160
lcs.core.microsoft 2026-06-20 05:58:02.841
localizationfileservice.core.microsoft 2026-07-26 18:22:19.896
mcsaiagents.security.core.microsoft 2026-06-16 15:39:27.902
prod.inventory.substrate.svc.core.microsoft 2026-06-23 11:47:32.155
prod.packages.kevlarforlinux.core.microsoft 2026-07-26 08:45:52.550
prod.skysafe.teams.core.microsoft 2026-06-20 03:28:22.106
qe.ued.core.microsoft 2026-06-21 23:40:15.617
sea.config.centro.core.microsoft 2026-07-27 18:25:56.107
tdf.dssync.teams.core.microsoft 2026-07-20 09:38:12.033
telarix.entitlement.teams.core.microsoft 2026-06-22 07:06:58.416
test1c.presence.communications.core.microsoft 2026-07-25 04:34:47.921
test1e.presence.communications.core.microsoft 2026-07-26 09:10:48.160
test1erem.presence.communications.core.microsoft 2026-07-26 09:10:48.160
test2c.presence.communications.core.microsoft 2026-07-25 04:34:47.921
test2crem.presence.communications.core.microsoft 2026-07-25 04:34:47.921
test2e.presence.communications.core.microsoft 2026-07-26 09:10:48.160
test2erem.presence.communications.core.microsoft 2026-07-26 09:10:48.160
test3c.presence.communications.core.microsoft 2026-07-25 04:34:47.921
test3crem.presence.communications.core.microsoft 2026-07-25 04:34:47.921
test3e.presence.communications.core.microsoft 2026-07-26 09:10:48.160
test3erem.presence.communications.core.microsoft 2026-07-26 09:10:48.160
tgcb.teams.core.microsoft 2026-07-28 08:31:23.092
weu.config.centro.core.microsoft 2026-07-27 18:25:56.107
acms.communications.core.microsoft
1970-01-01 00:00:00.000
active-protection.gcc.teams.core.microsoft 2026-07-27 16:12:13.521
adap.tfl.core.microsoft
1970-01-01 00:00:00.000
afd.northeurope.test.syntexrp.core.microsoft
1970-01-01 00:00:00.000
aiinfrastructure.core.microsoft 2026-07-27 13:31:15.179
aiinterpreterin.mcr.teams.core.microsoft
1970-01-01 00:00:00.000
ams.dev1.cdn.tdf.ml.communications.core.microsoft
1970-01-01 00:00:00.000
analytics-dev.neuron.teams.core.microsoft
1970-01-01 00:00:00.000
analytics.corp.neuron.teams.core.microsoft 2026-07-16 18:39:34.473
analytics.neuron.teams.core.microsoft 2026-06-23 05:20:15.188
antiphish-dogfood.teams.core.microsoft
1970-01-01 00:00:00.000
apac.msit.pasta.communications.core.microsoft 2026-06-19 15:13:22.094
apac.prod.active-protection.teams.core.microsoft 2026-07-28 03:24:34.002
apac.prod.appdiscovery.teams.core.microsoft 2026-07-20 21:18:03.635
api-int-noam.biometricsvc.teams.core.microsoft
1970-01-01 00:00:00.000
api-msit-noam.biometricsvc.teams.core.microsoft 2026-07-25 13:15:23.497
api-prod-apac.biometricsvc.teams.core.microsoft 2026-07-26 11:45:07.176
api.int.appsense.core.microsoft
1970-01-01 00:00:00.000
api.int.ic3aiot.teams.core.microsoft 2026-06-18 12:58:29.213
api.noam.tdf.mec.infra.teams.core.microsoft
1970-01-01 00:00:00.000
api.ppe.appsense.core.microsoft
1970-01-01 00:00:00.000
apm-tenant-mgmt-api.core.microsoft 2026-07-27 01:11:34.779
appdiscovery.teams.core.microsoft
1970-01-01 00:00:00.000
asse.prod.appsuggestions.teams.core.microsoft 2026-07-22 05:46:32.513
aus01.prod.centraladmin.substrate.svc.core.microsoft 2026-06-22 17:15:58.646
australiaeast.prod.skysafe.teams.core.microsoft 2026-06-20 03:28:22.106
australiaeast.sdf.skysafe.teams.core.microsoft 2026-07-26 10:46:00.019
australiasoutheast.prod.syntexrp.core.microsoft 2026-06-20 08:13:02.315
authservice.core.microsoft
1970-01-01 00:00:00.000
b.dev.dev1.cdn.tdf.ml.communications.core.microsoft
1970-01-01 00:00:00.000
bmc.teams.core.microsoft
1970-01-01 00:00:00.000

Tech Stack

Tech detection pending

Wappalyzer-rules detect CMS, frameworks, analytics, JS libs and server-side languages on this domain.

TLS Certificates

Subject: tca.teams.core.microsoft
Issuer: Microsoft TLS G2 RSA CA OCSP 02
SANs: *.rtaf.tca.teams.core.microsoft, *.tca.teams.core.microsoft, tca.teams.core.microsoft
Subject: *.aiinterpreterin.mcr.teams.core.microsoft
Issuer: Microsoft TLS G2 RSA CA OCSP 02
SANs: *.aiinterpreterin.mcr.teams.core.microsoft, *.aiinterpreterin.mcr.teams.microsoft.com
Subject: apac.prod.active-protection.teams.core.microsoft
Issuer: Microsoft TLS G2 RSA CA OCSP 16
SANs: apac.prod.active-protection.teams.core.microsoft
Subject: getitemsworker.powerpoint.core.microsoft
Issuer: Microsoft TLS G2 RSA CA OCSP 04
SANs: *.getitemsworker.edog.officeapps.live.com, *.getitemsworker.officeapps.live.com, *.getitemsworker.powerpoint.core.dev.microsoft, *.getitemsworker.powerpoint.core.microsoft, getitemsworker.edog.officeapps.live.com, getitemsworker.officeapps.live.com, getitemsworker.powerpoint.core.dev.microsoft, getitemsworker.powerpoint.core.microsoft
Subject: tca.teams.core.microsoft
Issuer: Microsoft TLS G2 RSA CA OCSP 02
SANs: *.rtaf.tca.teams.core.microsoft, *.tca.teams.core.microsoft, tca.teams.core.microsoft
Subject: *.fe.communications.core.microsoft
Issuer: Microsoft TLS G2 RSA CA OCSP 10
SANs: *.fe.communications.core.microsoft, *.scheduler.fe.communications.core.microsoft, *.testworker.fe.communications.core.microsoft, *.worker.fe.communications.core.microsoft
Subject: *.stampcontrolplane.teams.core.microsoft
Issuer: Microsoft TLS G2 RSA CA OCSP 10
SANs: *.failoverorchestrator.teams.core.microsoft, *.stampcontrolplane.teams.core.microsoft
Subject: *.lift.mcr.teams.core.microsoft
Issuer: Microsoft TLS G2 RSA CA OCSP 16
SANs: *.lift.mcr.teams.core.microsoft
Subject: *.fe.communications.core.microsoft
Issuer: Microsoft TLS G2 RSA CA OCSP 04
SANs: *.fe.communications.core.microsoft, *.scheduler.fe.communications.core.microsoft, *.testworker.fe.communications.core.microsoft, *.worker.fe.communications.core.microsoft
Subject: apac.prod.active-protection.teams.core.microsoft
Issuer: Microsoft TLS G2 RSA CA OCSP 10
SANs: apac.prod.active-protection.teams.core.microsoft
Subject: coresvc.gcc.dmsvc.teams.usgovcloud-core.microsoft
Issuer: Microsoft TLS G2 RSA CA OCSP 02
SANs: coresvc.gcc.dmsvc.teams.usgovcloud-core.microsoft
Subject: revocation.core.microsoft
Issuer: Microsoft TLS G2 RSA CA OCSP 16
SANs: *.revocation.core.microsoft, revocation.core.microsoft
Subject: *.fe.communications.core.microsoft
Issuer: Microsoft TLS G2 RSA CA OCSP 04
SANs: *.fe.communications.core.microsoft, *.scheduler.fe.communications.core.microsoft, *.testworker.fe.communications.core.microsoft, *.worker.fe.communications.core.microsoft
Subject: updateprocessor-prod-apac.dmsvc.teams.core.microsoft
Issuer: Microsoft TLS G2 RSA CA OCSP 04
SANs: updateprocessor-prod-apac.dmsvc.teams.core.microsoft
Subject: notificationsvc-prod-emea.dmsvc.teams.core.microsoft
Issuer: Microsoft TLS G2 RSA CA OCSP 04
SANs: notificationsvc-prod-emea.dmsvc.teams.core.microsoft
Subject: getitemsworker.powerpoint.core.microsoft
Issuer: Microsoft TLS G2 RSA CA OCSP 04
SANs: *.getitemsworker.edog.officeapps.live.com, *.getitemsworker.officeapps.live.com, *.getitemsworker.powerpoint.core.dev.microsoft, *.getitemsworker.powerpoint.core.microsoft, getitemsworker.edog.officeapps.live.com, getitemsworker.officeapps.live.com, getitemsworker.powerpoint.core.dev.microsoft, getitemsworker.powerpoint.core.microsoft
Subject: prod.appsuggestions.teams.core.microsoft
Issuer: Microsoft TLS G2 RSA CA OCSP 04
SANs: p01.sano.prod.appsuggestions.teams.core.microsoft, p02.sano.prod.appsuggestions.teams.core.microsoft, prod.appsuggestions.teams.core.microsoft, sano.prod.appsuggestions.teams.core.microsoft
Subject: *.aiinterpreterin.mcr.teams.core.microsoft
Issuer: Microsoft TLS G2 RSA CA OCSP 04
SANs: *.aiinterpreterin.mcr.teams.core.microsoft, *.aiinterpreterin.mcr.teams.microsoft.com
Subject: prod.appsuggestions.teams.core.microsoft
Issuer: Microsoft TLS G2 RSA CA OCSP 10
SANs: jpea.prod.appsuggestions.teams.core.microsoft, p01.jpea.prod.appsuggestions.teams.core.microsoft, p02.jpea.prod.appsuggestions.teams.core.microsoft, prod.appsuggestions.teams.core.microsoft
Subject: *.skypegraph.teams.core.microsoft
Issuer: Microsoft TLS G2 RSA CA OCSP 04
SANs: *.skypegraph.teams.core.microsoft, sgraphupdate.skype.net, skypegraph.skype.com
Subject: tca.teams.core.microsoft
Issuer: Microsoft TLS G2 RSA CA OCSP 02
SANs: *.rtaf.tca.teams.core.microsoft, *.tca.teams.core.microsoft, tca.teams.core.microsoft
Subject: revocation.core.microsoft
Issuer: Microsoft TLS G2 RSA CA OCSP 16
SANs: *.revocation.core.microsoft, revocation.core.microsoft
Subject: *.aiinterpreterin.mcr.teams.core.microsoft
Issuer: Microsoft TLS G2 RSA CA OCSP 04
SANs: *.aiinterpreterin.mcr.teams.core.microsoft, *.aiinterpreterin.mcr.teams.microsoft.com
Subject: *.skypegraph.teams.core.microsoft
Issuer: Microsoft TLS G2 RSA CA OCSP 04
SANs: *.skypegraph.teams.core.microsoft, sgraphupdate.skype.net, skypegraph.skype.com
Subject: getitemsworker.powerpoint.core.microsoft
Issuer: Microsoft TLS G2 RSA CA OCSP 04
SANs: *.getitemsworker.edog.officeapps.live.com, *.getitemsworker.officeapps.live.com, *.getitemsworker.powerpoint.core.dev.microsoft, *.getitemsworker.powerpoint.core.microsoft, getitemsworker.edog.officeapps.live.com, getitemsworker.officeapps.live.com, getitemsworker.powerpoint.core.dev.microsoft, getitemsworker.powerpoint.core.microsoft
Subject: llmmeteringapi.core.microsoft
Issuer: Microsoft TLS G2 RSA CA OCSP 16
SANs: llmmeteringapi.core.microsoft, substrate-inference-meteringapi-lb.prod.substrate-inference-meteringapi.japaneast-prod.cosmic.office.net, substrate-inference-meteringapi-lb.prod.substrate-inference-meteringapi.westus-prod.cosmic.office.net
Subject: llmmeteringapi.core.microsoft
Issuer: Microsoft TLS G2 RSA CA OCSP 16
SANs: llmmeteringapi.core.microsoft, substrate-inference-meteringapi-lb.prod.substrate-inference-meteringapi.japaneast-prod.cosmic.office.net, substrate-inference-meteringapi-lb.prod.substrate-inference-meteringapi.westus-prod.cosmic.office.net
Subject: *.fe.communications.core.microsoft
Issuer: Microsoft TLS G2 RSA CA OCSP 10
SANs: *.fe.communications.core.microsoft, *.worker.fe.communications.core.microsoft
Subject: intelligence-gw-prodnoam.dmmars.teams.core.microsoft
Issuer: Microsoft TLS G2 RSA CA OCSP 16
SANs: intelligence-gw-prodnoam.dmmars.teams.core.microsoft
Subject: *.fe.communications.core.microsoft
Issuer: Microsoft TLS G2 RSA CA OCSP 04
SANs: *.fe.communications.core.microsoft, *.scheduler.fe.communications.core.microsoft, *.testworker.fe.communications.core.microsoft, *.worker.fe.communications.core.microsoft

IPs Citing This Domain

No citing IPs found yet

As the world-sweep progresses, hosts referencing this domain in their HTML will surface here.

Origin / IP-Leak

USP

When a hostname is served behind a CDN (e.g. Cloudflare), the origin server can sometimes be identified by matching its TLS cert against the protected hostname. Findings shown here are heuristic candidates, not guarantees.

No origin-IP leaks detected (yet)

Either this domain doesn't sit behind a CDN, or we haven't seen a TLS cert from a non-CDN IP matching this hostname. Run a fullscan to refresh the cert→IP cross-reference.

Threat Intelligence

Domain threat-intel pending

Matches in URLhaus, OpenPhish, PhishTank, malware feeds, and Spamhaus DBL.

History

Passive DNS — every value this name ever resolved to and when we first / last observed it. Updates every cycle of our forward-DNS crawler.

Type Value First seen Last seen
CAA 0 issue "microsoft.com" 2026-06-02 03:45:33.953 2026-07-15 20:04:13.980
NS ns4-33.azure-dns.info 2026-06-02 03:45:33.953 2026-07-15 20:04:13.980
TXT v=spf1 -all 2026-06-02 03:45:33.953 2026-07-15 20:04:13.980
TXT MS=ms76478040 2026-06-02 03:45:33.953 2026-07-15 20:04:13.980
NS ns1-33.azure-dns.com 2026-06-02 03:45:33.953 2026-07-15 20:04:13.980
CAA 0 iodef "mailto:caarecordaware@microsoft.com" 2026-06-02 03:45:33.953 2026-07-15 20:04:13.980
CAA 0 contactemail "caarecordaware@microsoft.com" 2026-06-02 03:45:33.953 2026-07-15 20:04:13.980
NS ns3-33.azure-dns.org 2026-06-02 03:45:33.953 2026-07-15 20:04:13.980
CAA 0 issue "digicert.com" 2026-06-02 03:45:33.953 2026-07-15 20:04:13.980
NS ns2-33.azure-dns.net 2026-06-02 03:45:33.953 2026-07-15 20:04:13.980