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Hostname

u.nu

Last fetched

u.nu resolves to 2 IPv4 addresses operated by CLOUDFLARENET - Cloudflare, Inc. in CA. WHOIS lists registrar:nu domain ltd as the registrar.

Nutrition Label

WHISPER CANON · u.nuRouting diversity2.4/10Peering density10.0/10MOAS conflict✓ noneThreat-feed listings8.0/10WHOIS transparency0.0/10Resolver footprint8.0/10canon.whisper.security/host/u.nu

Resolution chain

u.nu resolves to 2 distinct IPv4 addresses via WhisperGraph DNS data. Each row links to the IP, prefix, and announcing ASN.

IPPrefixASNOperatorCountry
104.21.86.171104.21.80.0/20AS13335CLOUDFLARENET - Cloudflare, Inc.CA
172.67.222.103172.67.208.0/20AS13335CLOUDFLARENET - Cloudflare, Inc.CA

WHOIS identity

Registrar
registrar:nu domain ltd
Organization
—
Contact emails
—

Subdomains

3 observed subdomains of u.nu.

Subdomain
mail.u.nu
www.u.nu
ns2.u.nu

Web-graph footprint

Distinct hostnames that link to or from u.nu in the public web crawl.

297 sites link to this hostname.

Sample inbound links

Sample outbound links

Threat posture

History

Mail and authentication

MX records

SPF policy

3 SPF mechanisms authorising senders for u.nu.

MechanismTarget
SPF_INCLUDEmailgun.org
SPF_INCLUDEspf.messagingengine.com
SPF_INCLUDEspf.mtasv.net

Related pages

Pivot deeper into the graph from u.nu.

Cypher and MCP

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

MATCH (h:HOSTNAME {name: "u.nu"})-[: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.