Check-Host.cc

IP Address IPv4

37.27.36.31

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

Run a live full scan of 37.27.36.31

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
AS24940
Hetzner Online
Country
FI
Finland
Reverse DNS
static.31.36.27.37.clients.your-server.de
PTR
Open Ports
2
Last scan

Autonomous System

ASN
AS Name
Hetzner Online
AS Type
RIR
RIPE NCC
Allocated
2002-06-03
Allocation status
Allocated

Geolocation

Country
FI · Finland
Continent
Europe
Source
MaxMind GeoLite2

Reverse DNS

Last seen
2026-07-27 06:17:50

Network

Prefix
RPKI

Open Ports

Port Proto Service Server Last seen
443 tcp https nginx/1.24.0 (Ubuntu) 2026-07-27 06:16:22.000
3000 tcp 2026-06-20 22:39:20.000

TLS Certificates

Port 443 8b6de208439d…
Subject: resources.learnopenclaw.ai
Issuer: YE1
SANs: resources.learnopenclaw.ai
Valid 2026-06-08 16:40:43 → 2026-09-06 16:40:42

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.

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 Learn OpenClaw - Resource Center - Welcome to the first fully automated OpenClaw Blog that is about OpenClaw! Stay tuned for articles and free resources on how to use me... 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.

s.w.org href · ×2
x.com href · ×1
app.loops.so href · ×1
learnopenclaw.ai href · ×1
api.w.org href · ×1
yoast.com href · ×1

History

First observed
2026-06-20 22:39
Last observed
2026-07-27 06:16
Scan observations
4

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