Hostname
ff.cz
Last fetched
ff.cz resolves to 1 IPv4 address operated by WEB4U - Web4U s.r.o. in CZ. WHOIS lists registrar:reg-webglobe as the registrar.
Nutrition Label
Resolution chain
ff.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 |
|---|---|---|---|---|
| 81.91.80.217 | 81.91.80.0/21 | AS39790 | WEB4U - Web4U s.r.o. | CZ |
WHOIS identity
- Registrar
- registrar:reg-webglobe
- Organization
- central european computer company s.r.o.
- Contact emails
Subdomains
1 observed subdomain of ff.cz.
| Subdomain |
|---|
| www.ff.cz |
Web-graph footprint
Distinct hostnames that link to or from ff.cz in the public web crawl.
11 sites link to this hostname.
5 sites linked to from this hostname.
Sample inbound links
Sample outbound links
Threat posture
History
Mail and authentication
MX records
Related pages
Pivot deeper into the graph from ff.cz.
- IP · 81.91.80.217
- ASN · AS39790WEB4U - Web4U s.r.o.
- Registrar · registrar:reg-webglobe
- Country · CZ
- Email · pavel@magicware.cz
- TLD · .cz
- Browse hostnames · ff…
- Glossary · What is a hostname?
- Whisper Internet Directory — home
- Live MOAS conflicts feed
- Threat feed · Spamhaus DROP
- United States internet infrastructure
Cypher and MCP
Reproduce the resolution chain directly against graph.whisper.security:
MATCH (h:HOSTNAME {name: "ff.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 20Or query Whisper from your own LLM workflow via the Whisper MCP server.