Hostname

u4a.se

Last fetched Tue, 30 Jun 2026 12:42:31 GMT

u4a.se has no current public IPv4 resolution in WhisperGraph; WHOIS lists registrar:key-systems gmbh as the registrar.

Nutrition Label

Resolution chain

u4a.se 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: registrar:key-systems gmbh
Organization: —
Contact emails: —

Subdomains

13 observed subdomains of u4a.se.

Subdomain
cs-sso.u4a.se
cs.u4a.se
cstest-sso.u4a.se
cstest.u4a.se
ds-sso.u4a.se
ds.u4a.se
mail.u4a.se
pm-smtp-01.u4a.se
pm-smtp-02.u4a.se
saml.u4a.se
smtp.u4a.se
u4pp.u4a.se
ubw.u4a.se

Web-graph footprint

Distinct hostnames that link to or from u4a.se in the public web crawl.

Sample inbound links

freelinkadvice.com

Threat posture

History

Mail and authentication

MX records

SPF policy

4 SPF mechanisms authorising senders for u4a.se.

Mechanism	Target
SPF_A	u4a.se
SPF_IP	193.181.161.13/32
SPF_IP	89.107.218.4
SPF_MX	u4a.se

Pivot deeper into the graph from u4a.se.

Cypher and MCP

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

MATCH (h:HOSTNAME {name: "u4a.se"})-[: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.