Hostname

az4u.nl

Last fetched Sat, 18 Jul 2026 18:14:10 GMT

az4u.nl resolves to 1 IPv4 address operated by AS6724 in DE. WHOIS lists registrar:domain robot as the registrar.

Nutrition Label

Resolution chain

az4u.nl 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
81.169.145.78	81.169.144.0/22	AS6724	—	DE

WHOIS identity

Registrar: registrar:domain robot
Organization: —
Contact emails: —

Subdomains

1 observed subdomain of az4u.nl.

Subdomain
www.az4u.nl

Web-graph footprint

Distinct hostnames that link to or from az4u.nl in the public web crawl.

156 sites linked to from this hostname.

Sample inbound links

distrowatch.com

Sample outbound links

Threat posture

History

Mail and authentication

MX records

smtp.rzone.de

Pivot deeper into the graph from az4u.nl.

Cypher and MCP

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

MATCH (h:HOSTNAME {name: "az4u.nl"})-[: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.