Hostname

asv.cz

Last fetched Wed, 22 Jul 2026 16:43:03 GMT

asv.cz resolves to 2 IPv4 addresses operated by AS16019 in CZ. WHOIS lists registrar:reg-active24 as the registrar.

Nutrition Label

Resolution chain

asv.cz resolves to 2 distinct IPv4 addresses via WhisperGraph DNS data. Each row links to the IP, prefix, and announcing ASN.

IP	Prefix	ASN	Operator	Country
31.30.91.98	31.31.40.0/21	AS16019	—	CZ
91.139.103.250	91.140.96.0/20	AS13036	—	CZ

WHOIS identity

Registrar: registrar:reg-active24
Organization: asv náchod, a.s.
Contact emails: —

Subdomains

6 observed subdomains of asv.cz.

Subdomain
extranet.asv.cz
mail.asv.cz
mailin1.asv.cz
r.asv.cz
www.asv.cz

Showing 5 of 6. View all subdomains →

Web-graph footprint

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

6 sites link to this hostname.

2 sites linked to from this hostname.

Sample inbound links

Sample outbound links

Threat posture

History

Mail and authentication

MX records

SPF policy

3 SPF mechanisms authorising senders for asv.cz.

Mechanism	Target
SPF_INCLUDE	spf.protection.outlook.com
SPF_MX	asv.cz
SPF_MX	jhp.cz

Pivot deeper into the graph from asv.cz.

Cypher and MCP

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

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