Check-Host.cc

Domain

c2rsetup.officeapps.live.com

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

Run a live full scan of c2rsetup.officeapps.live.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
3
A/AAAA targets
Subdomains
CT + scan + body
Record Types
2
seen in DNS
Observed Certs
30
in our scans

DNS Records

A
52.111.243.71
AAAA
2603:1026:2405:1::40, 2603:1036:2401::a
MX
NS
TXT
CNAME
CAA

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: c2rsetup.officeapps.live.com
Issuer: Microsoft TLS G2 RSA CA OCSP 04
SANs: *.c2rsetup.officeapps.live.com, c2rsetup.officeapps.live.com

IPs Citing This Domain

Hosts whose HTML body references this domain. Strong signal for origin/mirror/embed discovery.

120.55.100.249:443 href · ×1
20.18.42.66:80 href · ×1
121.196.124.91:80 href · ×1

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.

CT-Log Evidence

Certificates from public Certificate Transparency logs whose subject or SAN names this domain — including historic certs we never observed live.

1b5829ef8bf04d43… google · xenon2026h2
Subject: c2rsetup.officeapps.live.com
Issuer: Microsoft Azure RSA TLS Issuing CA 04
SANs: c2rsetup.officeapps.live.com, *.c2rsetup.officeapps.live.com
Valid: 2026-02-19 07:13:30 → 2026-08-18 07:13:30
01c32930fdfd2171… google · xenon2026h2
Subject: c2rsetup.officeapps.live.com
Issuer: Microsoft Azure RSA TLS Issuing CA 08
SANs: c2rsetup.officeapps.live.com, *.c2rsetup.officeapps.live.com
Valid: 2026-02-18 19:28:08 → 2026-08-17 19:28:08
78772d939700fc79… google · xenon2026h2
Subject: c2rsetup.officeapps.live.com
Issuer: Microsoft Azure RSA TLS Issuing CA 08
SANs: c2rsetup.officeapps.live.com, *.c2rsetup.officeapps.live.com
Valid: 2026-02-18 05:58:56 → 2026-08-17 05:58:56
aff0ca8a18f4e381… google · xenon2026h2
Subject: c2rsetup.officeapps.live.com
Issuer: Microsoft Azure RSA TLS Issuing CA 08
SANs: c2rsetup.officeapps.live.com, *.c2rsetup.officeapps.live.com
Valid: 2026-02-17 21:58:37 → 2026-08-16 21:58:37
e67cd1db003e0166… google · xenon2026h2
Subject: c2rsetup.officeapps.live.com
Issuer: Microsoft Azure RSA TLS Issuing CA 04
SANs: c2rsetup.officeapps.live.com, *.c2rsetup.officeapps.live.com
Valid: 2026-01-29 10:00:08 → 2026-07-28 10:00:08
48f263cb39f76ada… google · xenon2026h2
Subject: c2rsetup.officeapps.live.com
Issuer: Microsoft Azure RSA TLS Issuing CA 04
SANs: c2rsetup.officeapps.live.com, *.c2rsetup.officeapps.live.com
Valid: 2026-01-28 03:06:07 → 2026-07-27 03:06:07
b4eb27656ada59c0… google · argon2026h2
Subject: c2rsetup.officeapps.live.com
Issuer: Microsoft Azure RSA TLS Issuing CA 03
SANs: c2rsetup.officeapps.live.com, *.c2rsetup.officeapps.live.com
Valid: 2025-08-07 18:42:51 → 2026-08-02 18:42:51

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
AAAA 2603:1026:2405:1::40 2026-05-27 00:17:41.200 2026-07-28 06:32:03.443
A 52.111.243.71 2026-05-27 00:17:41.200 2026-07-28 06:32:03.443
AAAA 2603:1036:2401::a 2026-07-20 16:08:38.454 2026-07-20 16:08:38.454