Hostname

ardf.cz

Last fetched Tue, 30 Jun 2026 10:11:53 GMT

ardf.cz resolves to 1 IPv4 address operated by AS16276 in DE. WHOIS lists registrar:reg-internet-cz as the registrar.

Nutrition Label

Resolution chain

ardf.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
51.89.6.94	51.89.0.0/16	AS16276	—	DE

WHOIS identity

Registrar: registrar:reg-internet-cz
Organization: rimado
Contact emails: —

Subdomains

5 observed subdomains of ardf.cz.

Subdomain
czteam.ardf.cz
mail.ardf.cz
result.ardf.cz
vysledky.ardf.cz
www.ardf.cz

Web-graph footprint

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

36 sites link to this hostname.

203 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 ardf.cz.

Mechanism	Target
SPF_A	ardf.cz
SPF_MX	ardf.cz

Pivot deeper into the graph from ardf.cz.

Cypher and MCP

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

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