Check-Host.cc

IP Address IPv4

4.231.13.17

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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ASN
AS8075
Microsoft
Country
NL
The Netherlands
Reverse DNS
PTR
Open Ports
1
Last scan

Autonomous System

ASN
AS Name
Microsoft
AS Type
RIR
ARIN
Allocated
2021-01-06
Allocation status
Allocated

Geolocation

Country
NL · The Netherlands
Continent
Europe
Source
MaxMind GeoLite2

Reverse DNS

PTR
Last seen

Network

Prefix
RPKI

Open Ports

Port Proto Service Server Last seen
443 tcp https nginx/1.24.0 (Ubuntu) 2026-07-23 18:37:58.000

TLS Certificates

Port 443 bbf483e6a7e6…
Subject: datalake.gaia-project.cloud
Issuer: YE1
SANs: datalake-dev.gaia-project.cloud, datalake.gaia-project.cloud
Valid 2026-06-05 06:54:52 → 2026-09-03 06:54:51

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

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

Port Page title Status Flags
443 Welcome - GeoData Lake 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.

History

First observed
2026-07-23 18:37
Last observed
2026-07-23 18:37
Scan observations
2

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