Check-Host.cc

IP Address IPv4

37.205.10.41

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

Run a live full scan of 37.205.10.41

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
Not yet attributed
Country
GeoIP pending
Reverse DNS
vf.krcmarovi.cz
PTR
Open Ports
4
Last scan

Autonomous System

ASN
AS Name
AS Type
RIR
Allocated

Geolocation

Country
Continent
Source
MaxMind GeoLite2

Reverse DNS

Last seen
2026-07-21 14:34:19

Network

Prefix
RPKI

Open Ports

Port Proto Service Server Last seen
25 tcp smtp 2026-06-07 04:02:07.000
443 tcp https nginx 2026-05-26 10:43:06.000
587 tcp smtp-submission 2026-07-18 08:59:46.000
993 tcp imaps 2026-07-21 14:33:20.000

TLS Certificates

Port 443 785f5d8024e9…
Subject: debian-linux.cz
Issuer: R13
SANs: debian-linux.cz, forum.debian-linux.cz, old.debian-linux.cz, www.debian-linux.cz
Valid 2026-05-04 21:02:07 → 2026-08-02 21:02:06

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

4 domains 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 2026-07-31.

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 Debian-Linux.cz - Debian-Linux.cz 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.

forum.debian-linux.cz 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.root.cz href · ×3
www.debian.org href · ×2
github.com href · ×2
jekyllrb.com href · ×1
mademistakes.com href · ×1
www.raspberrypi.com href · ×1
www.twitter.com href · ×1
www.instructables.com href · ×1

History

First observed
2026-05-26 10:42
Last observed
2026-07-21 14:33
Scan observations
8

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