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Hostname

bc21.cz

Last fetched

bc21.cz appears in WhisperGraph with partial WHOIS records but no current public IPv4 resolution.

Nutrition Label

WHISPER CANON · bc21.czRouting diversity0.0/10Peering density0.0/10MOAS conflict✓ noneThreat-feed listings10.0/10WHOIS transparency0.0/10Resolver footprint4.0/10canon.whisper.security/host/bc21.cz

Resolution chain

bc21.cz 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 bc21.cz in WhisperGraph.

Subdomains

6 observed subdomains of bc21.cz.

Subdomain
ai.bc21.cz
www.bc21.cz

Showing 2 of 6. View all subdomains →

Web-graph footprint

Distinct hostnames that link to or from bc21.cz in the public web crawl.

6 sites link to this hostname.

38 sites linked to from this hostname.

Sample inbound links

Sample outbound links

Threat posture

History

Mail and authentication

MX records

SPF policy

2 SPF mechanisms authorising senders for bc21.cz.

MechanismTarget
SPF_INCLUDE_spf.google.com
SPF_INCLUDEspf.protection.outlook.com

Related pages

Pivot deeper into the graph from bc21.cz.

Cypher and MCP

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

MATCH (h:HOSTNAME {name: "bc21.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.