Check-Host.cc

IP Address IPv4

3.37.233.4

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

Run a live full scan of 3.37.233.4

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
AS16509
Amazon.com
Country
KR
South Korea
Reverse DNS
ec2-3-37-233-4.ap-northeast-2.compute.amazonaws.com
PTR
Open Ports
1
Last scan

Autonomous System

ASN
AS Name
Amazon.com
AS Type
RIR
ARIN
Allocated
2000-05-04
Allocation status
Allocated

Geolocation

Country
KR · South Korea
Continent
Asia
Source
MaxMind GeoLite2

Reverse DNS

Last seen
2026-05-25 22:24:23

Network

Prefix
RPKI

Open Ports

Port Proto Service Server Last seen
80 tcp http Apache 2026-05-25 21:49:35.000

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

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.

Domain
jazzlark.com

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

Login panel served on port 80 — a sign-in form is exposed to the internet.

Port Page title Status Flags
80 jazzlark's 여행 & 사진 200 login

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.

jazzlark.com 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.

www.w3schools.com href · ×10
www.strava.com href · ×5
earth.google.com href · ×5
www.wunderground.com href · ×5
www.alltrails.com href · ×5
developer.mozilla.org href · ×2
ss64.com href · ×2
learn.wordpress.org href · ×1
www.jango.com href · ×1
www.php.net href · ×1
mariadb.com href · ×1
api.jquery.com href · ×1
codepen.io href · ×1
docs.bitnami.com href · ×1
blog.naver.com href · ×1
www.weather.go.kr href · ×1
dict.naver.com href · ×1
www.jazzradio.com href · ×1
support.microsoft.com href · ×1
photographylife.com href · ×1
validator.w3.org href · ×1
httpd.apache.org href · ×1
translate.google.com href · ×1
help.ubuntu.com href · ×1
www.commandlinux.com href · ×1
weather.com href · ×1
docs.centos.org href · ×1
stellarium.org href · ×1
learn.jquery.com href · ×1
www.ldoceonline.com href · ×1

History

First observed
2026-05-25 21:49
Last observed
2026-05-25 21:49
Scan observations
2

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