Hostname

troyer.cz

Last fetched Wed, 29 Jul 2026 22:25:04 GMT

troyer.cz resolves to 1 IPv4 address operated by AS204666 in CZ. WHOIS lists registrar:reg-internet-cz as the registrar.

Nutrition Label

Resolution chain

troyer.cz 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
91.224.90.54	91.224.90.0/23	AS204666	—	CZ

WHOIS identity

Registrar: registrar:reg-internet-cz
Organization: mpm-quality v.o.s.
Contact emails: —

Subdomains

5 observed subdomains of troyer.cz.

Subdomain
firmy.troyer.cz
old.troyer.cz
restaurace.troyer.cz
vyhodnenabidky.troyer.cz
www.troyer.cz

Web-graph footprint

Distinct hostnames that link to or from troyer.cz in the public web crawl.

59 sites link to this hostname.

28 sites linked to from this hostname.

Sample inbound links

Sample outbound links

Threat posture

History

Mail and authentication

MX records

SPF policy

6 SPF mechanisms authorising senders for troyer.cz.

Mechanism	Target
SPF_A	asta.mbcomp.cz
SPF_A	troyer.cz
SPF_INCLUDE	_spf.google.com
SPF_INCLUDE	_spf.mlsend.com
SPF_INCLUDE	spf.seznam.cz
SPF_MX	troyer.cz

Pivot deeper into the graph from troyer.cz.

Cypher and MCP

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

MATCH (h:HOSTNAME {name: "troyer.cz"})-[: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.