Hostname

csm.cz

Last fetched Tue, 28 Jul 2026 17:17:04 GMT

csm.cz resolves to 1 IPv4 address operated by AS13036 in CZ. WHOIS lists registrar:reg-internet-cz as the registrar.

Nutrition Label

Resolution chain

csm.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
89.233.129.21	89.233.128.0/18	AS13036	—	CZ

WHOIS identity

Registrar: registrar:reg-internet-cz
Organization: ceska spolecnost pro mechaniku
Contact emails: —

Subdomains

3 observed subdomains of csm.cz.

Subdomain
bulletin.csm.cz
c.csm.cz
www.csm.cz

Web-graph footprint

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

39 sites link to this hostname.

52 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 csm.cz.

Mechanism	Target
SPF_INCLUDE	spf.nux.cz

Pivot deeper into the graph from csm.cz.

Cypher and MCP

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

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