Hostname
mrk.cz
Last fetched
mrk.cz resolves to 1 IPv4 address operated by MASTER-AS - MasterDC s.r.o. in CZ. WHOIS lists registrar:reg-internet-cz as the registrar.
Nutrition Label
Resolution chain
mrk.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 |
|---|---|---|---|---|
| 89.185.255.248 | 89.185.224.0/19 | AS24971 | MASTER-AS - MasterDC s.r.o. | CZ |
WHOIS identity
- Registrar
- registrar:reg-internet-cz
- Organization
- martin matak
- Contact emails
Subdomains
1,038 observed subdomains of mrk.cz.
Showing 25 of 1,038. View all subdomains →
Web-graph footprint
Distinct hostnames that link to or from mrk.cz in the public web crawl.
370 sites link to this hostname.
Threat posture
History
Mail and authentication
MX records
SPF policy
3 SPF mechanisms authorising senders for mrk.cz.
| Mechanism | Target |
|---|---|
| SPF_A | mrk.cz |
| SPF_IP | 89.185.255.248 |
| SPF_MX | mrk.cz |
Related pages
Pivot deeper into the graph from mrk.cz.
- IP · 89.185.255.248
- ASN · AS24971MASTER-AS - MasterDC s.r.o.
- Registrar · registrar:reg-internet-cz
- Country · CZ
- Email · martin@mrk.cz
- TLD · .cz
- Browse hostnames · mr…
- 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: "mrk.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.