Hostname

librus.co.jp

Last fetched Thu, 13 Aug 2026 16:31:02 GMT

librus.co.jp resolves to 1 IPv4 address operated by GMO-I-R1 - GMO Internet, Inc. in JP.

Nutrition Label

Resolution chain

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

IP	Prefix	ASN	Operator	Country
133.130.94.18	133.130.64.0/18	AS7506	GMO-I-R1 - GMO Internet, Inc.	JP

WHOIS identity

Registrar: —
Organization: librus
Contact emails: —

Subdomains

3 observed subdomains of librus.co.jp.

Subdomain
liburs-ma.librus.co.jp
mta-sts.librus.co.jp
www.librus.co.jp

Web-graph footprint

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

65 sites link to this hostname.

78 sites linked to from this hostname.

Sample inbound links

Sample outbound links

Threat posture

History

Mail and authentication

MX records

librus.co.jp

SPF policy

4 SPF mechanisms authorising senders for librus.co.jp.

Mechanism	Target
SPF_A	librus.co.jp
SPF_A	sv14377.xserver.jp
SPF_INCLUDE	spf.sender.xserver.jp
SPF_MX	librus.co.jp

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

Cypher and MCP

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

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