Check-Host.cc

IP Address IPv4

121.126.86.106

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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Autonomous System

ASN
AS Name
KT Corporation (Korea Telecom)
AS Type
RIR
APNIC
Allocated
1996-04-22
Allocation status
Allocated

Geolocation

Country
KR · South Korea
Continent
Asia
Source
MaxMind GeoLite2

Reverse DNS

PTR
Last seen

Network

RPKI

Open Ports

Port Proto Service Server Last seen
80 tcp http 2026-05-26 14:52:44.000
443 tcp https 2026-07-28 08:37:24.000
3306 tcp mysql 2026-05-27 02:59:29.000

TLS Certificates

Port 443 9afec7f90c9b…
Subject: kakaobiz.kr
Issuer: Sectigo RSA Domain Validation Secure Server CA
SANs: kakaobiz.kr, www.kakaobiz.kr
Valid 2025-06-19 00:00:00 → 2026-07-09 23:59:59

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-2019-0190 Apache 2.4.37 7.5 N/A A bug exists in the way mod_ssl handled client renegotiations. A remote attacker could send a carefully crafted request that would cause mod_ssl to enter a loop...
CVE-2019-0215 Apache 2.4.37 7.5 N/A In Apache HTTP Server 2.4 releases 2.4.37 and 2.4.38, a bug in mod_ssl when using per-location client certificate verification with TLSv1.3 allowed a client to...
CVE-2019-10097 Apache 2.4.37 7.2 N/A In Apache HTTP Server 2.4.32-2.4.39, when mod_remoteip was configured to use a trusted intermediary proxy server using the "PROXY" protocol, a specially crafted...
CVE-2018-17189 Apache 2.4.37 5.3 N/A In Apache HTTP server versions 2.4.37 and prior, by sending request bodies in a slow loris way to plain resources, the h2 stream for that request unnecessarily...
CVE-2023-3817 OpenSSL 1.1.1k 5.3 N/A Issue summary: Checking excessively long DH keys or parameters may be very slow. Impact summary: Applications that use the functions DH_check(), DH_check_ex()...

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.

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.

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.

prodigybiz.kr 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.

History

First observed
2026-05-26 14:52
Last observed
2026-07-28 08:37
Scan observations
5

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