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Hostname

captn.sh

Last fetched

captn.sh resolves to 1 IPv4 address operated by AS25415 in DE. WHOIS lists iana:113 as the registrar.

Nutrition Label

WHISPER CANON · captn.shRouting diversity1.5/10Peering density3.1/10MOAS conflict✓ noneThreat-feed listings10.0/10WHOIS transparency3.3/10Resolver footprint3.2/10canon.whisper.security/host/captn.sh

Resolution chain

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

IPPrefixASNOperatorCountry
212.51.16.13212.51.0.0/19AS25415—DE

WHOIS identity

Registrar
iana:113
Organization
wissenschaftszentrum kiel
Contact emails
—

Subdomains

3 observed subdomains of captn.sh.

Subdomain
mail.captn.sh
webmail.captn.sh
www.captn.sh

Web-graph footprint

Distinct hostnames that link to or from captn.sh in the public web crawl.

51 sites link to this hostname.

119 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 captn.sh.

MechanismTarget
SPF_Acaptn.sh
SPF_Aplesk-smtp1.addix.net
SPF_MXcaptn.sh

Related pages

Pivot deeper into the graph from captn.sh.

Cypher and MCP

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

MATCH (h:HOSTNAME {name: "captn.sh"})-[: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.