Check-Host.cc

IP Address IPv4

91.99.236.97

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

Run a live full scan of 91.99.236.97

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
DE
Germany
Reverse DNS
static.97.236.99.91.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

Geolocation

Country
DE · Germany
Continent
Europe
Source
MaxMind GeoLite2

Reverse DNS

Last seen
2026-05-26 19:56:12

Network

Prefix
RPKI

Open Ports

Port Proto Service Server Last seen
80 tcp http 2026-05-26 19:50:34.000
443 tcp https 2026-05-26 05:45:32.000

TLS Certificates

Port 443 af3025f6bc77…
Subject: schaufenster-demo.schiefer.co
Issuer: R13
SANs: schaufenster-demo.schiefer.co, www.schaufenster-demo.schiefer.co
Valid 2026-04-13 18:41:35 → 2026-07-12 18:41:34

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

2 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.

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.

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.

alt.schiefer.co href · ×11
t.me href · ×1
www.pinterest.de href · ×1
bitcoin.org href · ×1
www.zv-uhren.de href · ×1
consent.cookiebot.com href · ×1
twitter.com href · ×1
schiefer.co href · ×1
www.schiefer.co href · ×1
www.ihk.de href · ×1
www.lbma.org.uk href · ×1

History

Historical change-log pending

ASN changes, prefix re-allocations, cert rotations, port-state diffs over months — accumulates as our archives grow.