Skip to content

Hostname

a21.dk

Last fetched

a21.dk resolves to 1 IPv4 address operated by AS51468 in DK.

Nutrition Label

WHISPER CANON · a21.dkRouting diversity1.5/10Peering density3.6/10MOAS conflict✓ noneThreat-feed listings10.0/10WHOIS transparency6.7/10Resolver footprint3.2/10canon.whisper.security/host/a21.dk

Resolution chain

a21.dk resolves to 1 distinct IPv4 address via WhisperGraph DNS data. Each row links to the IP, prefix, and announcing ASN.

IPPrefixASNOperatorCountry
77.111.240.21577.111.240.0/22AS51468—DK

WHOIS identity

Registrar
—
Organization
fonden agendacenter indre by-christianshavn
Contact emails
—

Subdomains

4 observed subdomains of a21.dk.

Subdomain
mail.a21.dk
webmail.a21.dk
wildcard.a21.dk
www.a21.dk

Web-graph footprint

Distinct hostnames that link to or from a21.dk in the public web crawl.

19 sites link to this hostname.

139 sites linked to from this hostname.

Sample inbound links

Sample outbound links

Threat posture

History

Mail and authentication

MX records

SPF policy

4 SPF mechanisms authorising senders for a21.dk.

MechanismTarget
SPF_INCLUDEspf.protection.outlook.com
SPF_IP152.115.82.69
SPF_IP195.249.225.194
SPF_IP62.116.200.20

Related pages

Pivot deeper into the graph from a21.dk.

Cypher and MCP

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

MATCH (h:HOSTNAME {name: "a21.dk"})-[: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.