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Hostname

isan.cz

Last fetched

isan.cz resolves to 1 IPv4 address operated by ZONER-AS - ZONER a.s. in CZ. WHOIS lists registrar:reg-internet-cz as the registrar.

Nutrition Label

WHISPER CANON · isan.czRouting diversity1.5/10Peering density2.4/10MOAS conflict✓ noneThreat-feed listings10.0/10WHOIS transparency3.3/10Resolver footprint3.2/10canon.whisper.security/host/isan.cz

Resolution chain

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

IPPrefixASNOperatorCountry
217.198.121.171217.198.112.0/20AS34222ZONER-AS - ZONER a.s.CZ

WHOIS identity

Registrar
registrar:reg-internet-cz
Organization
amtex radiatory s.r.o.
Contact emails
—

Subdomains

8 observed subdomains of isan.cz.

Subdomain
app1.isan.cz
autodiscover.isan.cz
dochazka.isan.cz
gate.isan.cz
reference.isan.cz
tsd.isan.cz
vpn.isan.cz
www.isan.cz

Web-graph footprint

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

80 sites link to this hostname.

49 sites linked to from this hostname.

Sample inbound links

Sample outbound links

Threat posture

History

Mail and authentication

MX records

SPF policy

5 SPF mechanisms authorising senders for isan.cz.

MechanismTarget
SPF_INCLUDEspf.protection.outlook.com
SPF_INCLUDEspf.smartemailing.cz
SPF_IP194.213.42.2
SPF_IP217.198.123.77
SPF_MXisan.cz

Related pages

Pivot deeper into the graph from isan.cz.

Cypher and MCP

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

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