Hostname

defect.cz

Last fetched Mon, 01 Jun 2026 15:49:03 GMT

defect.cz resolves to 1 IPv4 address operated by AS51210 in CZ.

Nutrition Label

Resolution chain

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

IP	Prefix	ASN	Operator	Country
178.217.244.53	178.217.240.0/21	AS51210	—	CZ

WHOIS identity

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

Subdomains

1 observed subdomain of defect.cz.

Subdomain
www.defect.cz

Web-graph footprint

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

7 sites link to this hostname.

12 sites linked to from this hostname.

Sample inbound links

Sample outbound links

Threat posture

History

Mail and authentication

MX records

grey.xnet.cz

SPF policy

2 SPF mechanisms authorising senders for defect.cz.

Mechanism	Target
SPF_A	smtp-out.xnet.cz
SPF_MX	defect.cz

Pivot deeper into the graph from defect.cz.

Cypher and MCP

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

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