Hostname
optimweb.cz
Last fetched
optimweb.cz resolves to 4 IPv4 addresses operated by CLOUDFLARENET - Cloudflare, Inc. in CA. WHOIS lists registrar:reg-gransy as the registrar.
Nutrition Label
Resolution chain
optimweb.cz resolves to 4 distinct IPv4 addresses via WhisperGraph DNS data. Each row links to the IP, prefix, and announcing ASN.
| IP | Prefix | ASN | Operator | Country |
|---|---|---|---|---|
| 104.21.90.35 | 104.21.80.0/20 | AS13335 | CLOUDFLARENET - Cloudflare, Inc. | CA |
| 172.67.194.38 | 172.67.192.0/20 | AS13335 | CLOUDFLARENET - Cloudflare, Inc. | CA |
| 188.114.96.3 | 188.114.96.0/24 | AS13335 | CLOUDFLARENET - Cloudflare, Inc. | CA |
| 188.114.97.3 | 188.114.97.0/24 | AS13335 | CLOUDFLARENET - Cloudflare, Inc. | CA |
WHOIS identity
- Registrar
- registrar:reg-gransy
- Organization
- optimweb s.r.o.
- Contact emails
- —
Subdomains
43 observed subdomains of optimweb.cz.
Showing 25 of 43. View all subdomains →
Web-graph footprint
Distinct hostnames that link to or from optimweb.cz in the public web crawl.
148 sites link to this hostname.
70 sites linked to from this hostname.
Sample inbound links
Threat posture
History
Mail and authentication
MX records
SPF policy
6 SPF mechanisms authorising senders for optimweb.cz.
| Mechanism | Target |
|---|---|
| SPF_A | amanita.jed.cz |
| SPF_A | optimweb.cz |
| SPF_INCLUDE | _spf.elasticemail.com |
| SPF_INCLUDE | servers.mcsv.net |
| SPF_IP | 81.0.225.44 |
| SPF_MX | optimweb.cz |
Related pages
Pivot deeper into the graph from optimweb.cz.
Cypher and MCP
Reproduce the resolution chain directly against graph.whisper.security:
MATCH (h:HOSTNAME {name: "optimweb.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.