Check-Host.cc

IP Address IPv4

157.205.195.27

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

Run a live full scan of 157.205.195.27

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
ASN
AS17514
Otsuka Corporation
Country
JP
Japan
Reverse DNS
websvr157-205-195-27.alpha-prm.jp
PTR
Open Ports
1
Last scan

Autonomous System

ASN
AS Name
Otsuka Corporation
AS Type
RIR
APNIC
Allocated
1992-01-28
Allocation status
Allocated

Geolocation

Country
JP · Japan
Continent
Asia
Source
MaxMind GeoLite2

Reverse DNS

Last seen
2026-07-28 11:28:19

Network

RPKI

Open Ports

Port Proto Service Server Last seen
443 tcp https Apache 2026-07-28 11:22:28.000

TLS Certificates

Port 443 a2462f11f190…
Subject: www.acas.or.jp
Issuer: Cybertrust Japan SureServer EV CA G3
SANs: www.acas.or.jp
Valid 2026-05-12 10:16:47 → 2026-10-31 14:59:00
Port 443 a2462f11f190…
Subject: www.acas.or.jp
Issuer: Cybertrust Japan SureServer EV CA G3
SANs: www.acas.or.jp
Valid 2026-05-12 10:16:47 → 2026-10-31 14:59:00

Tech Stack

Detected via Wappalyzer-style rules on the HTTP response body, headers, scripts and meta tags.

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.

Hosted Domains

1 domain resolve (A-record) to this IP.

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.

Web Pages

Port Page title Status Flags
443 新CAS協議会 | トップページ 200

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.

www.acas.or.jp DNS-confirmed

External References

No external references found yet

As HTML bodies get banner-grabbed, references to external domains land here.

History

First observed
2026-05-26 18:52
Last observed
2026-07-28 11:22
Scan observations
4

The full change-log (ASN moves, cert rotations, port-state diffs) accumulates as our archives grow.