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Hostname

itbook.co.jp

Last fetched

itbook.co.jp resolves to 1 IPv4 address operated by SAKURA-C - SAKURA Internet Inc. in JP.

Nutrition Label

WHISPER CANON · itbook.co.jpRouting diversity1.5/10Peering density3.4/10MOAS conflict✓ noneThreat-feed listings10.0/10WHOIS transparency3.3/10Resolver footprint4.6/10canon.whisper.security/host/itbook.co.jp

Resolution chain

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

IPPrefixASNOperatorCountry
219.94.213.124219.94.128.0/17AS9371SAKURA-C - SAKURA Internet Inc.JP

WHOIS identity

Registrar
—
Organization
itbook co.,ltd.
Contact emails
—

Subdomains

2 observed subdomains of itbook.co.jp.

Subdomain
file.itbook.co.jp
www.itbook.co.jp

Web-graph footprint

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

35 sites link to this hostname.

20 sites linked to from this hostname.

Sample inbound links

Sample outbound links

Threat posture

History

Mail and authentication

MX records

SPF policy

3 SPF mechanisms authorising senders for itbook.co.jp.

MechanismTarget
SPF_INCLUDEspf.protection.outlook.com
SPF_IP118.103.3.96/27
SPF_IP203.152.32.27

Related pages

Pivot deeper into the graph from itbook.co.jp.

Cypher and MCP

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

MATCH (h:HOSTNAME {name: "itbook.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.