Hostname

opp.cz

Last fetched Sat, 25 Jul 2026 04:39:39 GMT

opp.cz resolves to 1 IPv4 address operated by AS197019 in CZ. WHOIS lists registrar:reg-internet-cz as the registrar.

Nutrition Label

Resolution chain

opp.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
89.221.213.134	89.222.34.0/23	AS197019	—	CZ

WHOIS identity

Registrar: registrar:reg-internet-cz
Organization: oblastni prumyslovy podnik policka a.s.
Contact emails: —

Subdomains

1 observed subdomain of opp.cz.

Subdomain
www.opp.cz

Web-graph footprint

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

13 sites link to this hostname.

32 sites linked to from this hostname.

Sample inbound links

Sample outbound links

Threat posture

History

Mail and authentication

MX records

opp-cz.mail.protection.outlook.com

SPF policy

4 SPF mechanisms authorising senders for opp.cz.

Mechanism	Target
SPF_INCLUDE	spf.protection.outlook.com
SPF_IP	46.28.106.23/26
SPF_IP	84.16.98.98
SPF_IP	89.221.213.134

Pivot deeper into the graph from opp.cz.

Cypher and MCP

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

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