Hostname

son.cz

Last fetched Tue, 04 Aug 2026 14:05:05 GMT

son.cz resolves to 1 IPv4 address operated by ACTIVE24-AS - ACTIVE 24, s.r.o. in CZ. WHOIS lists registrar:reg-active24 as the registrar.

Nutrition Label

Resolution chain

son.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
31.15.10.61	31.15.8.0/21	AS25234	ACTIVE24-AS - ACTIVE 24, s.r.o.	CZ

WHOIS identity

Registrar: registrar:reg-active24
Organization: sdružení nájemníků čr
Contact emails: —

Subdomains

4 observed subdomains of son.cz.

Subdomain
d.son.cz
data.son.cz
urok.son.cz
www.son.cz

Web-graph footprint

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

79 sites link to this hostname.

22 sites linked to from this hostname.

Sample inbound links

Sample outbound links

Threat posture

History

Mail and authentication

MX records

SPF policy

4 SPF mechanisms authorising senders for son.cz.

Mechanism	Target
SPF_A	son.cz
SPF_INCLUDE	spf.active24.com
SPF_INCLUDE	spf.clipsan.net
SPF_MX	son.cz

Pivot deeper into the graph from son.cz.

Cypher and MCP

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

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