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Hostname

1stclass.co.jp

Last fetched

1stclass.co.jp resolves to 1 IPv4 address operated by AS63949 in JP.

Nutrition Label

WHISPER CANON · 1stclass.co.jpRouting diversity1.5/10Peering density4.3/10MOAS conflict✓ noneThreat-feed listings10.0/10WHOIS transparency3.3/10Resolver footprint8.2/10canon.whisper.security/host/1stclass.co.jp

Resolution chain

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

IPPrefixASNOperatorCountry
139.162.67.100139.162.64.0/19AS63949—JP

WHOIS identity

Registrar
—
Organization
1st class,
Contact emails
—

Subdomains

1 observed subdomain of 1stclass.co.jp.

Subdomain
www.1stclass.co.jp

Web-graph footprint

Distinct hostnames that link to or from 1stclass.co.jp in the public web crawl.

39 sites link to this hostname.

31 sites linked to from this hostname.

Sample inbound links

Sample outbound links

Threat posture

History

Mail and authentication

MX records

SPF policy

1 SPF mechanism authorising senders for 1stclass.co.jp.

MechanismTarget
SPF_INCLUDE_spf.google.com

Related pages

Pivot deeper into the graph from 1stclass.co.jp.

Cypher and MCP

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

MATCH (h:HOSTNAME {name: "1stclass.co.jp"})-[: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.