Hostname

core.co.jp

Last fetched Mon, 14 Sep 2026 10:35:52 GMT

core.co.jp is a hostname indexed by WhisperGraph, the internet-infrastructure graph behind the Whisper Internet Directory. core.co.jp is not listed on any threat feed indexed by WhisperGraph; reconciled level NONE.

Threat posture

0threat score (procedure-native scale)

NONE

No threats observed.

Threat feeds listing this: 0
Verdict coverage: known-clean

Nutrition Label

Resolution chain

No IPv4 resolution is recorded for core.co.jp in WhisperGraph.

IPv6 resolution

No AAAA record for core.co.jp is recorded in WhisperGraph.

WHOIS identity

Registrant organisation: core corporation

Subdomains

Subdomain
biztrial.core.co.jp
cc.core.co.jp
csc.core.co.jp
dns.core.co.jp
dns2.core.co.jp
erd.core.co.jp
esetsv.core.co.jp
ftp.core.co.jp
gate.core.co.jp
giga.core.co.jp
gw-cc.core.co.jp
gw-csc.core.co.jp

Showing 12 of 50. View all subdomains →

Web-graph footprint

Sampled `LINKS_TO` edges. The hyperlink layer is a pilot sample, not a web-scale crawl, so these are illustrative.

Mail and authentication

Nameservers

uns02.usen.ad.jp
dns.core.co.jp
dns2.core.co.jp

MX records

mailgw.core.co.jp

SPF policy

ip: 113.40.88.144/28
include: spf.smktg.jp
ip: 61.125.173.197
ip: 61.125.173.198

Threat-feed evidence

History

Pivot from core.co.jp into the addresses, networks and registries it depends on.

Cypher and MCP

Reproduce this hostname's resolution chain against graph.whisper.security:

MATCH (h:HOSTNAME {name: "core.co.jp"})-[:RESOLVES_TO]->(ip:IPV4)
      -[:ANNOUNCED_BY]->(ap:ANNOUNCED_PREFIX)-[:ROUTES]->(a:ASN)
OPTIONAL MATCH (a)-[:HAS_NAME]->(n:ASN_NAME)
RETURN ip.name AS ip, ap.name AS prefix, a.name AS asn, n.name AS network
LIMIT 20

Or query Whisper from your own LLM workflow via the Whisper MCP server.