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Hostname

master.cz

Last fetched

master.cz resolves to 1 IPv4 address operated by MASTER-AS Czech Republic www.master.cz in CZ.

Nutrition Label

WHISPER CANON · master.czRouting diversity—Peering density—MOAS conflict—Threat-feed listings—WHOIS transparency—Resolver footprint—canon.whisper.security/host/master.cz

Resolution chain

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

IPPrefixASNOperatorCountry
81.31.45.14881.31.32.0/20AS24971MASTER-AS Czech Republic www.master.czCZ

WHOIS identity

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Subdomains

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Web-graph footprint

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

Sample inbound links

Sample outbound links

Threat posture

History

Mail and authentication

MX records

SPF policy

11 SPF mechanisms authorising senders for master.cz.

MechanismTarget
SPF_Acis.masterdc.com
SPF_Acloud-2123.masterinter.net
SPF_Ad24.westmaster.com
SPF_Ad4023.masterinter.net
SPF_Amailing.master.cz
SPF_INCLUDEspf.protection.outlook.com
SPF_IP185.58.41.176
SPF_IP2a01:430:100:5c:0:0:0:2
SPF_IP77.93.193.48
SPF_IP81.31.45.148
SPF_MXmaster.cz

Related pages

Pivot deeper into the graph from master.cz.

Cypher and MCP

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

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