Check-Host.cc

IP Address IPv4

49.12.237.179

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

Run a live full scan of 49.12.237.179

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.179.237.12.49.clients.your-server.de
PTR
Open Ports
Last scan

Autonomous System

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

Geolocation

Country
DE · Germany
Continent
Europe
Source
MaxMind GeoLite2

Reverse DNS

Last seen
2026-07-26 21:53:49

Network

Prefix
RPKI

Open Ports

Port-scan data not yet ingested

Open-port and banner-grab data from our scan layer will appear here. World-sweep covers all IPv4 over time — this host may be in a /8 we haven't reached yet.

TLS Certificates

Port 443 dc0150992511…
Subject: 4dukpgprdb7xhyn2clkb.avoplan.de
Issuer: YR1
SANs: 4dukpgprdb7xhyn2clkb.avoplan.de
Valid 2026-06-19 09:40:05 → 2026-09-17 09:40:04
Port 443 5821158803c9…
Subject: 4dukpgprdb7xhyn2clkb.avoplan.de
Issuer: R13
SANs: 4dukpgprdb7xhyn2clkb.avoplan.de
Valid 2026-04-20 00:11:32 → 2026-07-19 00:11:31

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.

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.

example.com href · ×20
github.com href · ×16
meet.example.com href · ×8
jitsi.org href · ×8
www.gravatar.com href · ×6
f-droid.org href · ×4
itunes.apple.com href · ×4
play.google.com href · ×4
docs.example.com href · ×4
myservice.com href · ×4
datatracker.ietf.org href · ×2
testrtc.com href · ×2
community.jitsi.org href · ×2
www.npmjs.com href · ×2
chrome.google.com href · ×2
web-cdn.jitsi.net href · ×2
policies.google.com href · ×2
api.example.com href · ×2
example-company.org href · ×2
avoplan.de href · ×2
meet.jit.si href · ×2
jitsi.github.io href · ×2
firebase.google.com href · ×2

History

Historical change-log pending

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