Check-Host.cc

Domain

microsoftonline.com

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

Run a live full scan of microsoftonline.com

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
A/AAAA targets
Subdomains
CT + scan + body
Record Types
seen in DNS
Observed Certs
in our scans

DNS Records

A
AAAA
MX
10 messaging-microsoft-com.mail.protection.outlook.com
NS
ns1-38.azure-dns.com, ns2-38.azure-dns.net, ns3-38.azure-dns.org, ns4-38.azure-dns.info
TXT
google-site-verification=CNZTg2P9nNfuZUJdHTYBONoHbOjMq7UPVvxoqMgomfQ, google-site-verification=y-tlrGiMNJkBF1UO4Xk0GjbVwYk3p5urCieV9B1sHJ0, v=spf1 ip4:216.32.180.228 include:spfa.microsoftonline.com include:spf-exacttarget.microsoftonline.com include:spf-msods.microsoftonline.com include:spf-mfa.microsoftonline.com include:_spf-ssg-a.microsoft.com -all
CNAME
CAA
0 contactemail "caarecordaware@microsoft.com", 0 iodef "mailto:domains@microsoft.com", 0 issue "digicert.com", 0 issue "entrust.net", 0 issue "globalsign.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

Subdomain enumeration pending

Every subdomain ever issued a TLS cert under this apex — extracted from Certificate Transparency logs, our own scan observations and body references.

Tech Stack

Tech detection pending

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

TLS Certificates

Subject: login.microsoftonline.com
Issuer: Microsoft RSA TLS CA 02
SANs: *.windows.net, login.microsoftonline.com
Subject: login.microsoftonline.com
Issuer: Microsoft RSA TLS CA 02
SANs: *.windows.net, login.microsoftonline.com
Subject: cloud.email.microsoftonline.com
Issuer: Microsoft Azure RSA TLS Issuing CA 08
SANs: cloud.email.microsoftonline.com
Subject: login.microsoftonline.com
Issuer: Microsoft RSA TLS CA 02
SANs: *.windows.net, login.microsoftonline.com
Subject: login.microsoftonline.com
Issuer: Microsoft RSA TLS CA 02
SANs: *.windows.net, login.microsoftonline.com
Subject: microsoftonline.com.mail.crmcustomersinc.com
Issuer: GeoTrust TLS RSA CA G1
SANs: microsoftonline.com.mail.crmcustomersinc.com
Subject: login.microsoftonline.com
Issuer: Microsoft RSA TLS CA 02
SANs: *.windows.net, login.microsoftonline.com
Subject: login.microsoftonline.com
Issuer: Microsoft RSA TLS CA 02
SANs: *.windows.net, login.microsoftonline.com

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.

Origin IP Origin ASN CDN ASN Confidence Reasoning
81.85.77.103 AS62904 AS8075 95% cert fd3b639f… served by 81.85.77.103 (AS62904) carries SAN login.microsoftonline.com which currently resolves through Microsoft (AS8075) at 40.126.31.129, 20.190.159.68, 2603:1027:1:28::1e, 40.126.31.3
31.59.93.105 AS56594 AS8075 95% cert 42346111… served by 31.59.93.105 (AS56594) carries SAN login.microsoftonline.com which currently resolves through Microsoft (AS8075) at 20.190.160.67, 2603:1027:1:108::7, 2603:1026:3000:108::4, 2603:1026:3000:110::5
77.238.229.179 AS216071 AS8075 95% cert b87a9c44… served by 77.238.229.179 (AS216071) carries SAN login.microsoftonline.com which currently resolves through Microsoft (AS8075) at 20.231.128.67, 40.126.53.10, 20.231.128.66, 40.126.53.18
185.242.85.11 AS209847 AS8075 95% cert 0cb6ffff… served by 185.242.85.11 (AS209847) carries SAN login.microsoftonline.com which currently resolves through Microsoft (AS8075) at 40.126.32.74, 20.190.160.14, 2603:1027:1:d0::4, 40.126.32.72
78.17.3.134 AS213459 AS8075 95% cert f1b9b159… served by 78.17.3.134 (AS213459) carries SAN login.microsoftonline.com which currently resolves through Microsoft (AS8075) at 20.190.177.19, 20.190.177.21, 20.190.177.84, 2603:1027:1:108::10
185.255.178.31 AS41745 AS8075 95% cert feade44e… served by 185.255.178.31 (AS41745) carries SAN login.microsoftonline.com which currently resolves through Microsoft (AS8075) at 20.190.159.129, 40.126.31.67, 40.126.31.3, 2603:1027:1:28::e
46.224.209.200 AS24940 AS8075 95% cert 2d4c2aa2… served by 46.224.209.200 (AS24940) carries SAN login.microsoftonline.com which currently resolves through Microsoft (AS8075) at 2603:1027:1:150::3, 20.190.177.83, 20.190.177.22, 2603:1026:3000:150::5
65.108.94.233 AS24940 AS8075 95% cert 2d4c2aa2… served by 65.108.94.233 (AS24940) carries SAN login.microsoftonline.com which currently resolves through Microsoft (AS8075) at 20.190.159.130, 40.126.31.67, 40.126.31.129, 20.190.159.4
31.77.73.160 AS200173 AS8075 95% cert f1b9b159… served by 31.77.73.160 (AS200173) carries SAN login.microsoftonline.com which currently resolves through Microsoft (AS8075) at 2603:1027:1:c8::3, 2603:1026:3000:d8::2, 20.190.147.11, 2603:1026:3000:d8::3
2.27.39.225 AS215590 AS8075 95% cert 16b8ecae… served by 2.27.39.225 (AS215590) carries SAN login.microsoftonline.com which currently resolves through Microsoft (AS8075) at 2603:1027:1:c8::3, 2603:1026:3000:d8::2, 20.190.147.11, 2603:1026:3000:d8::3
2.27.39.225 AS215590 AS8075 95% cert feade44e… served by 2.27.39.225 (AS215590) carries SAN login.microsoftonline.com which currently resolves through Microsoft (AS8075) at 2603:1027:1:c8::3, 2603:1026:3000:d8::2, 20.190.147.11, 2603:1026:3000:d8::3
45.8.93.209 AS215439 AS8075 95% cert 286e71d0… served by 45.8.93.209 (AS215439) carries SAN login.microsoftonline.com which currently resolves through Microsoft (AS8075) at 2603:1027:1:c8::3, 2603:1026:3000:d8::2, 20.190.147.11, 2603:1026:3000:d8::3
80.69.173.74 AS202053 AS8075 95% cert 394e114f… served by 80.69.173.74 (AS202053) carries SAN ccs.login.microsoftonline.com which currently resolves through Microsoft (AS8075) at 2603:1026:c0d:100b::2, 2603:1026:c0d:100d::2, 52.97.250.242, 52.98.232.18
178.255.222.58 AS56971 AS8075 95% cert 42346111… served by 178.255.222.58 (AS56971) carries SAN login.microsoftonline.com which currently resolves through Microsoft (AS8075) at 20.190.160.5, 2603:1026:3000:158::4, 2603:1026:3000:148::7, 2603:1027:1:150::3
155.212.164.59 AS29182 AS8075 95% cert 286e71d0… served by 155.212.164.59 (AS29182) carries SAN login.microsoftonline.com which currently resolves through Microsoft (AS8075) at 20.190.160.5, 2603:1026:3000:158::4, 2603:1026:3000:148::7, 2603:1027:1:150::3
192.55.236.27 AS4972 AS8075 95% cert 56f3d78e… served by 192.55.236.27 (AS4972) carries SAN login.microsoftonline.com which currently resolves through Microsoft (AS8075) at 2603:1026:3000:158::3, 20.190.159.131, 20.190.159.130, 40.126.31.3
185.242.85.11 AS209847 AS8075 95% cert e9cbb3fa… served by 185.242.85.11 (AS209847) carries SAN login.microsoftonline.com which currently resolves through Microsoft (AS8075) at 20.190.160.14, 2603:1026:3000:148::6, 40.126.32.133, 2603:1027:1:158::8
151.236.20.130 AS9009 AS8075 95% cert 0cb6ffff… served by 151.236.20.130 (AS9009) carries SAN login.microsoftonline.com which currently resolves through Microsoft (AS8075) at 20.190.159.71, 2603:1027:1:158::8, 2603:1027:1:148::f, 20.190.159.131
2.26.114.9 AS213877 AS8075 95% cert 394e114f… served by 2.26.114.9 (AS213877) carries SAN ccs.login.microsoftonline.com which currently resolves through Microsoft (AS8075) at 2603:1026:c0d:100b::2, 2603:1026:c0d:100d::2, 52.97.250.242, 52.98.232.18
31.56.27.12 AS56971 AS8075 95% cert f1b9b159… served by 31.56.27.12 (AS56971) carries SAN login.microsoftonline.com which currently resolves through Microsoft (AS8075) at 20.190.159.68, 40.126.31.130, 2603:1026:3000:150::8, 2603:1026:3000:148::6
49.13.11.174 AS24940 AS8075 95% cert 2d4c2aa2… served by 49.13.11.174 (AS24940) carries SAN login.microsoftonline.com which currently resolves through Microsoft (AS8075) at 2603:1026:3000:150::8, 2603:1027:1:150::4, 2603:1026:3000:158::2, 2603:1027:1:148::4
157.22.199.92 AS29182 AS8075 95% cert feade44e… served by 157.22.199.92 (AS29182) carries SAN login.microsoftonline.com which currently resolves through Microsoft (AS8075) at 2603:1027:1:150::4, 2603:1026:3000:150::c, 20.190.159.64, 40.126.31.71
65.109.163.96 AS24940 AS8075 95% cert 2d4c2aa2… served by 65.109.163.96 (AS24940) carries SAN login.microsoftonline.com which currently resolves through Microsoft (AS8075) at 40.126.31.71, 20.190.159.130, 20.190.159.68, 40.126.31.67

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" 2026-07-15 20:04:13.980 2026-07-15 20:04:13.980
NS ns2-38.azure-dns.net 2026-07-15 20:04:13.980 2026-07-15 20:04:13.980
NS ns4-38.azure-dns.info 2026-07-15 20:04:13.980 2026-07-15 20:04:13.980
TXT google-site-verification=CNZTg2P9nNfuZUJdHTYBONoHbOjMq7UPVvxoqMgomfQ 2026-07-15 20:04:13.980 2026-07-15 20:04:13.980
CAA 0 contactemail "caarecordaware@microsoft.com" 2026-07-15 20:04:13.980 2026-07-15 20:04:13.980
CAA 0 issue "entrust.net" 2026-07-15 20:04:13.980 2026-07-15 20:04:13.980
CAA 0 iodef "mailto:domains@microsoft.com" 2026-07-15 20:04:13.980 2026-07-15 20:04:13.980
MX 10 messaging-microsoft-com.mail.protection.outlook.com 2026-07-15 20:04:13.980 2026-07-15 20:04:13.980
NS ns3-38.azure-dns.org 2026-07-15 20:04:13.980 2026-07-15 20:04:13.980
TXT google-site-verification=y-tlrGiMNJkBF1UO4Xk0GjbVwYk3p5urCieV9B1sHJ0 2026-07-15 20:04:13.980 2026-07-15 20:04:13.980
CAA 0 issue "digicert.com" 2026-07-15 20:04:13.980 2026-07-15 20:04:13.980
TXT v=spf1 ip4:216.32.180.228 include:spfa.microsoftonline.com include:spf-exacttarget.microsoftonline.com include:spf-msods.microsoftonline.com include:spf-mfa.microsoftonline.com include:_spf-ssg-a.microsoft.com -all 2026-07-15 20:04:13.980 2026-07-15 20:04:13.980
CAA 0 issue "globalsign.com" 2026-07-15 20:04:13.980 2026-07-15 20:04:13.980
NS ns1-38.azure-dns.com 2026-07-15 20:04:13.980 2026-07-15 20:04:13.980