Hostname

rku.de

Last fetched Sun, 09 Aug 2026 11:10:59 GMT

rku.de resolves to 1 IPv4 address operated by BELWUE - Universitaet Stuttgart in DE.

Nutrition Label

Resolution chain

rku.de 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
193.197.70.91	193.197.70.0/24	AS553	BELWUE - Universitaet Stuttgart	DE

WHOIS identity

No WHOIS records are currently associated with rku.de in WhisperGraph.

Subdomains

9 observed subdomains of rku.de.

Subdomain
autodiscover.rku.de
crm.rku.de
exchange.rku.de
mail.rku.de
mail1.rku.de
mail2.rku.de
mx.rku.de
pt.rku.de
www.rku.de

Web-graph footprint

Distinct hostnames that link to or from rku.de in the public web crawl.

87 sites link to this hostname.

52 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 rku.de.

Mechanism	Target
SPF_A	mx.rku.de
SPF_INCLUDE	_spf3207.ppsmtp.net
SPF_INCLUDE	spf.protection.outlook.com

Pivot deeper into the graph from rku.de.

Cypher and MCP

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

MATCH (h:HOSTNAME {name: "rku.de"})-[: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.