Check-Host.cc
Try 1.1.1.1 AS13335 check-host.cc /country/de /tld/cc
Domain

4gnu.org

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

DNS Check HTTP Check Run Full Scan .org TLD

Run a live full scan of 4gnu.org

On-demand: ports, banners, TLS, tech-stack, subdomains and origin/IP-leak detection. Results are shared publicly for everyone to link to.

Deep-scan now
Hosting IPs
1
A/AAAA targets
Subdomains
1
CT + scan + body
Record Types
2
seen in DNS
Observed Certs
—
in our scans

DNS Records

A
91.219.244.97
AAAA
—
MX
—
NS
ns.gransy.com, ns2.gransy.com, ns3.gransy.com, ns4.gransy.com, ns5.gransy.com
TXT
—
CNAME
—
CAA
—

WHOIS / Registration

Registration data planned

Registrar, creation/expiry dates and domain status via RDAP. Rolling out gradually — bulk WHOIS is rate-limited, so we resolve on a prioritized cadence.

Subdomains

Every subdomain we know about — harvested from CT-log SANs, scan-observed certs and HTML body references — paired with its current A/AAAA target.

Subdomain Resolves to Last seen
4gnu.org
91.219.244.97
2026-08-21 05:41:31.526

Tech Stack

Tech detection pending

Wappalyzer-rules detect CMS, frameworks, analytics, JS libs and server-side languages on this domain.

TLS Certificates

91.219.244.97:443 16f932919694…
Subject: frantovo.cz
Issuer: E8
SANs: 4gnu.org, archkucera.com, backtotheaugust.org, blog.frantovo.cz, blog.trolling.cz, crypto.ebanka.ch, demo-1.sql-vyuka.cz, demo-2.sql-vyuka.cz, demo-3.sql-vyuka.cz, disk.archkucera.com, ebanka.ch, frantovo.cz, git-zaloha.frantovo.cz, hg-zaloha.frantovo.cz, hg.frantovo.cz, i1984.cz, klub.ebanka.ch, lists.globalcode.info, mercurial.frantovo.cz, mojeip.i1984.cz, mojeip4.i1984.cz, mojeip4e.i1984.cz, mojeip6.i1984.cz, mojeip6e.i1984.cz, monca.cz, nekrast.cz, nekurak.net, nntp.i1984.cz, paste.i1984.cz, podnik.frantovo.cz, podnikani.trolling.cz, rozpad.eu, software.frantovo.cz, sql-vyuka.cz, sqlvyuka.cz, svobodnysoftware.frantovo.cz, telco.frantovo.cz, test.trolling.cz, trac.frantovo.cz, trolling.cz, www.archkucera.com, www.ebanka.ch, www.frantovo.cz, www.i1984.cz, www.monca.cz, www.nekrast.cz, www.nekurak.net, www.rozpad.eu, www.sql-vyuka.cz, www.sqlvyuka.cz, www.trolling.cz, zerobin.i1984.cz, zpovednice.trolling.cz

IPs Citing This Domain

No citing IPs found yet

As the world-sweep progresses, hosts referencing this domain in their HTML will surface here.

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-IP leaks detected (yet)

Either this domain doesn't sit behind a CDN, or we haven't seen a TLS cert from a non-CDN IP matching this hostname. Run a fullscan to refresh the cert→IP cross-reference.

Threat Intelligence

Domain threat-intel pending

Matches in URLhaus, OpenPhish, PhishTank, malware feeds, and Spamhaus DBL.

History

Passive DNS — every value this name ever resolved to and when we first / last observed it. Updates every cycle of our forward-DNS crawler.

Type Value First seen Last seen
NS ns3.gransy.com 2026-06-16 15:00:57.407 2026-08-21 05:41:31.526
NS ns5.gransy.com 2026-06-16 15:00:57.407 2026-08-21 05:41:31.526
A 91.219.244.97 2026-06-16 15:00:57.407 2026-08-21 05:41:31.526
NS ns4.gransy.com 2026-06-16 15:00:57.407 2026-08-21 05:41:31.526
NS ns.gransy.com 2026-06-16 15:00:57.407 2026-08-21 05:41:31.526
NS ns2.gransy.com 2026-06-16 15:00:57.407 2026-08-21 05:41:31.526