Hostname

envelope.co.jp

Last fetched Thu, 09 Jul 2026 01:59:53 GMT

envelope.co.jp appears in WhisperGraph with partial WHOIS records but no current public IPv4 resolution.

Nutrition Label

Resolution chain

envelope.co.jp has no current public IPv4 resolution in WhisperGraph. The WHOIS record below is the only graph data we have on this hostname.

WHOIS identity

Registrar: —
Organization: cahoots
Contact emails: —

Subdomains

7 observed subdomains of envelope.co.jp.

Subdomain
account.envelope.co.jp
ftp.envelope.co.jp
info.envelope.co.jp
mail.envelope.co.jp
nishinomiya.envelope.co.jp
www.envelope.co.jp

Showing 6 of 7. View all subdomains →

Web-graph footprint

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

107 sites link to this hostname.

45 sites linked to from this hostname.

Sample inbound links

Sample outbound links

Threat posture

History

Mail and authentication

MX records

kuvert.sakura.ne.jp

SPF policy

8 SPF mechanisms authorising senders for envelope.co.jp.

Mechanism	Target
SPF_A	www2948.sakura.ne.jp
SPF_A	www321b.sakura.ne.jp
SPF_INCLUDE	_spf.hostedemail.com
SPF_INCLUDE	_spf.otoiawase.jp
SPF_INCLUDE	e-grant.ko-sokumail.net
SPF_INCLUDE	mailgun.org
SPF_INCLUDE	shops.shopify.com
SPF_MX	envelope.co.jp

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

Cypher and MCP

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

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