Hostname

erbu.cz

Last fetched Wed, 08 Jul 2026 08:53:11 GMT

erbu.cz resolves to 1 IPv4 address operated by AS29405 in SK. WHOIS lists registrar:reg-gransy as the registrar.

Nutrition Label

Resolution chain

erbu.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
81.89.48.10	81.89.214.0/24	AS29405	—	SK

WHOIS identity

Registrar: registrar:reg-gransy
Organization: tss group a. s.
Contact emails: —

Subdomains

1 observed subdomain of erbu.cz.

Subdomain
www.erbu.cz

Web-graph footprint

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

10 sites linked to from this hostname.

Sample inbound links

erbu.sk

Sample outbound links

Threat posture

History

Mail and authentication

MX records

mail.tssgroup.cloud

SPF policy

2 SPF mechanisms authorising senders for erbu.cz.

Mechanism	Target
SPF_INCLUDE	spf.tssgroup.cloud
SPF_MX	erbu.cz

Pivot deeper into the graph from erbu.cz.

Cypher and MCP

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

MATCH (h:HOSTNAME {name: "erbu.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.