Check-Host.cc

IP Address IPv4

202.254.98.21

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

Run a live full scan of 202.254.98.21

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
www.hss.cs.t-kougei.ac.jp
PTR
Open Ports
1
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
2026-07-26 21:43:20

Network

RPKI

Open Ports

Port Proto Service Server Last seen
80 tcp http Apache 2026-07-23 22:10:42.000

TLS Certificates

TLS certificate observations pending

Once our scan layer captures a TLS cert from this IP, certificate chain, JARM and JA4S fingerprints will appear here.

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.

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.

ICMP responsive This IP replied to our global ICMP sweep — last confirmed 2026-08-02.

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
80 Katagami Lab. 片上研究室 (Human Symbiotic System Laboratory HSS研究室) 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.

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.

hai-conference.net href · ×26
www.t-kougei.ac.jp href · ×23
www.ai-gakkai.or.jp href · ×18
www.jstage.jst.go.jp href · ×10
www.ieice.org href · ×6
jaws-web.org href · ×6
togetter.com href · ×6
sites.google.com href · ×5
exidea.co.jp href · ×4
www.aiwolf.org href · ×4
knowledge-art.co.jp href · ×4
soft-cr.org href · ×3
neuro-diversity.world href · ×3
siai.jp href · ×3
kokucheese.com href · ×3
fss2015.j-soft.org href · ×3
klikandpay.co.jp href · ×3
lc-holdings.co.jp href · ×3
link.springer.com href · ×2
fss2017.j-soft.org href · ×2
www.amazon.co.jp href · ×2
jp.his.gr.jp href · ×2
www.j-soft.org href · ×2
2018.cedec.cesa.or.jp href · ×2
caresul-kaigo.jp href · ×2
www.ii.is.kit.ac.jp href · ×2
tonolab.jp href · ×2
fss2018.j-soft.org href · ×2
www.commu-ai.org href · ×2
www.nii.ac.jp href · ×1
cedec.cesa.or.jp href · ×1
andreasviklund.com href · ×1
ro-man2016.org href · ×1
www.ipsj.or.jp href · ×1
www.tkomat-lab.com href · ×1
fss2019.j-soft.org href · ×1
fss2014.j-soft.org href · ×1
taai2025.org href · ×1
www.gakkai-web.net href · ×1
www.hcg-ieice.org href · ×1
www.ifi.unizh.ch href · ×1
www.cs.t-kougei.ac.jp href · ×1
dl.acm.org href · ×1
www.toyoag.co.jp href · ×1
iceic.org href · ×1
wirelesswire.jp href · ×1
www.unizh.ch href · ×1
prtimes.jp href · ×1
www.fuzzieee2017.org href · ×1
fuzzieee2015.org href · ×1
www.ijcai19.org href · ×1
www.wcci2016.org href · ×1
www.titech.ac.jp href · ×1
www.frontiersin.org href · ×1
www.inside-games.jp href · ×1
ro-man2015.org href · ×1
www.anlp.jp href · ×1
www.nittai.ac.jp href · ×1
perseus.herts.ac.uk href · ×1
radiko.jp href · ×1
ijcai-16.org href · ×1
scis2016.j-soft.org href · ×1
www.his.gr.jp href · ×1
www.ifi.uzh.ch href · ×1
www.morikita.co.jp href · ×1
fss2016.j-soft.org href · ×1
om.hmup.jp href · ×1

History

Historical change-log pending

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