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Hostname

system4u.sk

Last fetched

system4u.sk appears in WhisperGraph with partial WHOIS records but no current public IPv4 resolution.

Nutrition Label

WHISPER CANON · system4u.skRouting diversity0.0/10Peering density0.0/10MOAS conflict✓ noneThreat-feed listings10.0/10WHOIS transparency0.0/10Resolver footprint3.2/10canon.whisper.security/host/system4u.sk

Resolution chain

system4u.sk has no current public IPv4 resolution in WhisperGraph. The WHOIS record below is the only graph data we have on this hostname.

WHOIS identity

No WHOIS records are currently associated with system4u.sk in WhisperGraph.

Subdomains

3 observed subdomains of system4u.sk.

Subdomain
test.system4u.sk
websupport.system4u.sk
www.system4u.sk

Web-graph footprint

Distinct hostnames that link to or from system4u.sk in the public web crawl.

59 sites linked to from this hostname.

Sample inbound links

Sample outbound links

Threat posture

History

Mail and authentication

MX records

SPF policy

1 SPF mechanism authorising senders for system4u.sk.

MechanismTarget
SPF_INCLUDEspf.protection.outlook.com

Related pages

Pivot deeper into the graph from system4u.sk.

Cypher and MCP

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

MATCH (h:HOSTNAME {name: "system4u.sk"})-[: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.