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Hostname

test4u.cz

Last fetched

test4u.cz resolves to 1 IPv4 address operated by WEB4U - Web4U s.r.o. in CZ.

Nutrition Label

WHISPER CANON · test4u.czRouting diversity1.5/10Peering density3.1/10MOAS conflict✓ noneThreat-feed listings10.0/10WHOIS transparency0.0/10Resolver footprint3.2/10canon.whisper.security/host/test4u.cz

Resolution chain

test4u.cz resolves to 1 distinct IPv4 address via WhisperGraph DNS data. Each row links to the IP, prefix, and announcing ASN.

IPPrefixASNOperatorCountry
81.91.84.21081.91.80.0/21AS39790WEB4U - Web4U s.r.o.CZ

WHOIS identity

No WHOIS records are currently associated with test4u.cz in WhisperGraph.

Subdomains

2 observed subdomains of test4u.cz.

Subdomain
mail.test4u.cz
www.test4u.cz

Web-graph footprint

Distinct hostnames that link to or from test4u.cz in the public web crawl.

23 sites link to this hostname.

70 sites linked to from this hostname.

Sample inbound links

Sample outbound links

Threat posture

History

Mail and authentication

MX records

Related pages

Pivot deeper into the graph from test4u.cz.

Cypher and MCP

Reproduce the resolution chain directly against graph.whisper.security:

MATCH (h:HOSTNAME {name: "test4u.cz"})-[:RESOLVES_TO]->(ip:IPV4)
      -[:ANNOUNCED_BY]->(ap:ANNOUNCED_PREFIX)
      -[:ROUTES]->(asn:ASN)-[:HAS_NAME]->(n:ASN_NAME)
RETURN ip.name AS ip, ap.name AS prefix, asn.name AS asn, n.name AS operator
LIMIT 20

Or query Whisper from your own LLM workflow via the Whisper MCP server.