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Hostname

holwert.frl

Last fetched

holwert.frl resolves to 1 IPv4 address operated by AS20847 in NL. WHOIS lists iana:1647 as the registrar.

Nutrition Label

WHISPER CANON · holwert.frlRouting diversity1.5/10Peering density5.5/10MOAS conflict✓ noneThreat-feed listings10.0/10WHOIS transparency10.0/10Resolver footprint8.0/10canon.whisper.security/host/holwert.frl

Resolution chain

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

IPPrefixASNOperatorCountry
141.138.169.247141.138.168.0/22AS20847—NL

WHOIS identity

Registrar
iana:1647
Organization
domain administration
Contact emails

Subdomains

10 observed subdomains of holwert.frl.

Subdomain
archief.holwert.frl
beleef.holwert.frl
mail.holwert.frl
nieuwsbrief.holwert.frl
test.holwert.frl
www.holwert.frl

Showing 6 of 10. View all subdomains →

Web-graph footprint

Distinct hostnames that link to or from holwert.frl in the public web crawl.

89 sites linked to from this hostname.

Sample inbound links

Sample outbound links

Threat posture

History

Mail and authentication

MX records

SPF policy

6 SPF mechanisms authorising senders for holwert.frl.

MechanismTarget
SPF_Aholwert.frl
SPF_IP141.138.168.0/21
SPF_IP195.211.72.0/22
SPF_IP2a03:3c00:a001::/48
SPF_IP2a03:3c00:a002::/48
SPF_MXholwert.frl

Related pages

Pivot deeper into the graph from holwert.frl.

Cypher and MCP

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

MATCH (h:HOSTNAME {name: "holwert.frl"})-[: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.