Check-Host.cc

IP Address IPv4

133.44.71.58

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

Run a live full scan of 133.44.71.58

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

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ASN
AS2907
National Institute of Informatics
Country
JP
Japan
Reverse DNS
alcllan.nagaokaut.ac.jp
PTR
Open Ports
2
Last scan

Autonomous System

ASN
AS Name
National Institute of Informatics
AS Type
RIR
APNIC
Allocated
2002-08-01
Allocation status
Allocated

Geolocation

Country
JP · Japan
Continent
Asia
Source
MaxMind GeoLite2

Reverse DNS

Last seen
2026-05-27 08:29:10

Network

Prefix
RPKI

Open Ports

Port Proto Service Server Last seen
80 tcp http Apache/2.4.66 (Win64) OpenSSL/3.6.1 2026-05-26 08:43:59.000
443 tcp https Apache/2.4.66 (Win64) OpenSSL/3.6.1 2026-05-26 23:23:07.000

TLS Certificates

Port 443 3fbc3e0859d9…
Subject: alcllan.nagaokaut.ac.jp
Issuer: NII Open Domain CA - G7 RSA
SANs: alcllan.nagaokaut.ac.jp
Valid 2025-07-29 02:48:07 → 2026-08-29 02:48:07

Known Vulnerabilities

Published CVEs matched to the software versions fingerprinted on this host. Matching is by product and version against the NVD dictionary — presence of a CVE does not confirm the host is exploitable (patches or backports may apply).

CVE Software CVSS Severity Summary
CVE-2026-23918 Apache 2.4.66 8.8 N/A Double Free and possible RCE vulnerability in Apache HTTP Server with the HTTP/2 protocol. This issue affects Apache HTTP Server: 2.4.66. Users are recommende...

Tech Stack

Wappalyzer fingerprinting pending

HTTP-body analysis identifies web frameworks, CMS platforms, analytics, JS libraries and server-side languages from this host.

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-leak candidates for this IP

When this IP serves a TLS cert for a domain that fronts behind a CDN, that domain surfaces here as an origin-leak candidate with a confidence score.

Multi-Vantage Check

Reachability accrued passively from real user-triggered checks across our 65+ probe nodes. Run a live check to add fresh data.

No accumulated reachability data yet

Reachability accrues from real user-triggered checks. Trigger a Ping or HTTP check from our 65+ probe nodes to contribute the first data point.

Threat Intelligence

No threat-intel matches

This IP doesn't appear in any of the feeds we mirror (Tor exits, FireHOL Level 1-3, Spamhaus DROP/EDROP, URLhaus, OpenPhish). Absence here doesn't prove the IP is clean — it just means none of our public-feed sources flag it.

Co-Hosted Domains

Domains this host references in its HTML AND whose DNS A/AAAA record resolves back to this IP — i.e. actually hosted here.

alcllan.nagaokaut.ac.jp DNS-confirmed

External References

Domains the body links to whose DNS does NOT resolve to this IP — usually CDN assets, embeds, or third-party services. Boilerplate (Google Fonts, jsDelivr, w3.org…) is already filtered.

researchmap.jp href · ×2

History

Historical change-log pending

ASN changes, prefix re-allocations, cert rotations, port-state diffs over months — accumulates as our archives grow.