Check-Host.cc

IP Address IPv4

65.21.105.86

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

Run a live full scan of 65.21.105.86

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.86.105.21.65.clients.your-server.de
PTR
Open Ports
4
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
2026-07-24 12:10:19

Network

Prefix
RPKI

Open Ports

Port Proto Service Server Last seen
53 tcp dns 2026-05-26 00:50:37.000
80 tcp http Apache 2026-07-24 12:09:13.000
143 tcp imap 2026-05-27 01:25:55.000
443 tcp https Apache 2026-06-13 10:59:31.000

TLS Certificates

Port 443 4fde437016a1…
Subject: imasfundacion.es
Issuer: R13
SANs: imasfundacion.es, www.imasfundacion.es
Valid 2026-04-19 02:48:57 → 2026-07-18 02:48:56

Tech Stack

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.

twitter.com href · ×3
mailchi.mp href · ×3
www.flickr.com href · ×2
secardiologia.es href · ×2
jextensions.com href · ×1
www.geidis.es href · ×1
apis.google.com href · ×1

History

Historical change-log pending

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