Hostname
simopt.cz
Last fetched
simopt.cz resolves to 1 IPv4 address operated by MASTER-AS - MasterDC s.r.o. in CZ. WHOIS lists registrar:reg-active24 as the registrar.
Nutrition Label
Resolution chain
simopt.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 |
|---|---|---|---|---|
| 194.145.180.44 | 194.145.180.0/22 | AS24971 | MASTER-AS - MasterDC s.r.o. | CZ |
WHOIS identity
- Registrar
- registrar:reg-active24
- Organization
- simopt, s.r.o.
- Contact emails
- —
Subdomains
36 observed subdomains of simopt.cz.
Showing 25 of 36. View all subdomains →
Web-graph footprint
Distinct hostnames that link to or from simopt.cz in the public web crawl.
71 sites link to this hostname.
20 sites linked to from this hostname.
Sample inbound links
Threat posture
History
Mail and authentication
MX records
SPF policy
7 SPF mechanisms authorising senders for simopt.cz.
| Mechanism | Target |
|---|---|
| SPF_A | simopt.cz |
| SPF_INCLUDE | spf.protection.outlook.com |
| SPF_IP | 194.145.180.34 |
| SPF_IP | 194.145.180.40 |
| SPF_IP | 194.145.180.44 |
| SPF_IP | 77.93.207.52 |
| SPF_MX | simopt.cz |
Related pages
Pivot deeper into the graph from simopt.cz.
Cypher and MCP
Reproduce the resolution chain directly against graph.whisper.security:
MATCH (h:HOSTNAME {name: "simopt.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.