Hostname

jbl.cz

Last fetched Sat, 08 Aug 2026 21:04:45 GMT

jbl.cz resolves to 2 IPv4 addresses operated by CLOUDFLARENET - Cloudflare, Inc. in CA. WHOIS lists registrar:reg-active24 as the registrar.

Nutrition Label

Resolution chain

jbl.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
104.21.95.84	104.21.80.0/20	AS13335	CLOUDFLARENET - Cloudflare, Inc.	CA
172.67.143.216	172.67.128.0/20	AS13335	CLOUDFLARENET - Cloudflare, Inc.	CA

WHOIS identity

Registrar: registrar:reg-active24
Organization: dsi czech s.r.o.
Contact emails: —

Subdomains

3 observed subdomains of jbl.cz.

Subdomain
beta.jbl.cz
servis.jbl.cz
www.jbl.cz

Web-graph footprint

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

80 sites link to this hostname.

Sample inbound links

Threat posture

History

Mail and authentication

MX records

jbl-cz.mail.protection.outlook.com

SPF policy

1 SPF mechanism authorising senders for jbl.cz.

Mechanism	Target
SPF_INCLUDE	spf.protection.outlook.com

Pivot deeper into the graph from jbl.cz.

Cypher and MCP

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

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