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Hostname

csst.at

Last fetched

csst.at resolves to 104.26.12.166, announced in 104.26.0.0/20 by CLOUDFLARENET - Cloudflare, Inc. in CA. csst.at is listed by 1 threat feed; reconciled level HIGH.

Threat posture

40threat score (procedure-native scale)

HIGH

Listed by 1 threat feed. At least one source recommends blocking.

Categories: Phishing

Threat feeds listing this
1
Verdict coverage
malicious-evidenced
First seen on a feed
Wed, 26 Aug 2026 14:51:25 GMT
Last seen on a feed
Mon, 14 Sep 2026 00:15:52 GMT

Nutrition Label

WHISPER CANON · csst.atRouting diversity1.5/10Peering density10.0/10MOAS conflict✓ noneThreat-feed listings8.0/10WHOIS transparency0.0/10Resolver footprint3.2/10canon.whisper.security/host/csst.at

Resolution chain

IPv6 resolution

Attribution

Cloudflare

cdn · ORIGIN_AS, CDN

WHOIS identity

Registrar
registrar:hosting concepts b.v. / registrar.eu

Subdomains

Subdomain
manager.csst.at
webmail.csst.at
wildcard.csst.at

Showing 3 of 3 subdomains (3 per page).

Mail and authentication

Nameservers

  • corey.ns.cloudflare.com
  • hattie.ns.cloudflare.com

MX records

  • mail.protonmail.ch
  • mailsec.protonmail.ch

SPF policy

  • include: _spf.protonmail.ch

Threat-feed evidence

History

Related pages

Pivot from csst.at 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: "csst.at"})-[: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.