Check-Host.cc

IP Address IPv4

133.125.85.73

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

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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
AS7684
SAKURA-A
Country
JP
Japan
Reverse DNS
PTR
Open Ports
1
Last scan

Autonomous System

ASN
AS Name
SAKURA-A
AS Type
RIR
APNIC
Allocated
1997-03-01
Allocation status
Allocated

Geolocation

Country
JP · Japan
Continent
Asia
Source
MaxMind GeoLite2

Reverse DNS

PTR
Last seen

Network

RPKI

Open Ports

Port Proto Service Server Last seen
443 tcp https Apache 2026-05-26 02:50:54.000

TLS Certificates

Port 443 3b5b045671e4…
Subject: ch.piapro.jp
Issuer: FujiSSL RSA Domain Validation Secure Server CA 2
SANs: ch.piapro.jp
Valid 2026-02-03 00:00:00 → 2027-03-05 23:59:59

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.

Domain
ch.piapro.jp

Multi-Vantage Check

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

ICMP responsive This IP replied to our global ICMP sweep — last confirmed 2026-08-03.

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 ピアプロch - ピアプロがお送りするクリエイター向け情報発信ブログ! 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.

ch.piapro.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.

blog.crypton.co.jp href · ×2
www.crypton.co.jp href · ×2
s.w.org href · ×2
piapro.jp href · ×1
ec.crypton.co.jp href · ×1
mikumoba.jp href · ×1
blog.sonicwire.com href · ×1
twitter.com href · ×1
karent.jp href · ×1
gmpg.org href · ×1
blog.piapro.net href · ×1
miraist.com href · ×1
api.w.org href · ×1
static.addtoany.com href · ×1

History

First observed
2026-05-26 02:50
Last observed
2026-05-26 02:50
Scan observations
2

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