Skip to content

Hostname

c21tens.com

Last fetched

c21tens.com resolves to 1 IPv4 address operated by AS9370 in JP. WHOIS lists iana:49 as the registrar.

Nutrition Label

WHISPER CANON · c21tens.comRouting diversity1.5/10Peering density4.3/10MOAS conflict✓ noneThreat-feed listings10.0/10WHOIS transparency10.0/10Resolver footprint4.0/10canon.whisper.security/host/c21tens.com

Resolution chain

c21tens.com resolves to 1 distinct IPv4 address via WhisperGraph DNS data. Each row links to the IP, prefix, and announcing ASN.

IPPrefixASNOperatorCountry
153.125.228.9153.125.224.0/20AS9370—JP

WHOIS identity

Registrar
iana:49
Organization
tens home co.,ltd.
Contact emails

Subdomains

3 observed subdomains of c21tens.com.

Subdomain
mail.c21tens.com
www.c21tens.com

Showing 2 of 3. View all subdomains →

Web-graph footprint

Distinct hostnames that link to or from c21tens.com in the public web crawl.

19 sites linked to from this hostname.

Sample inbound links

Sample outbound links

Threat posture

History

Mail and authentication

MX records

SPF policy

5 SPF mechanisms authorising senders for c21tens.com.

MechanismTarget
SPF_INCLUDE_spf.google.com
SPF_INCLUDEspf.macly.jp
SPF_INCLUDEspfblue.macly.jp
SPF_INCLUDEspfsakura.macly.jp
SPF_MXc21tens.com

Related pages

Pivot deeper into the graph from c21tens.com.

Cypher and MCP

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

MATCH (h:HOSTNAME {name: "c21tens.com"})-[: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.