109.164.53.18
# IP INTELLIGENCE BRIEFING
Subject: 109.164.53.18/32
Classification: CLEAN / LOW RISK
Date: 2026-07-26
---
## EXECUTIVE SUMMARY
IP 109.164.53.18 is a low-risk infrastructure address belonging to STARNET_CZ (ASN 44489) in Czech Republic. The address shows no malicious activity, no services in operation, and belongs to a clean subnet with zero abuse density.
---
## OWNERSHIP & GEOLOCATION
- Organization: MNT-CZSTARNET (STARNET_CZ)
- ASN: 44489
- Country: Czech Republic (CZ)
- City: Pilsen
- Network Block: 109.164.32.0/19
- RIR: ARIN
- Timezone: Europe/Prague
---
## RISK ASSESSMENT
| Metric | Value |
|---|---|
| Risk Score | 25 (Low Risk) |
| Reputation | Low Risk |
| Abuse Confidence | N/A |
| Blacklist Count | 0 |
| Tor Exit Node | No |
| Known Attacker | No |
| Spam Source | No |
Control Plane Indicators:
- DNSBL Listed: 1 of 8 total lists
- Operator Score: 0.2609 (Basic)
- Route Stability: False
- RPKI State: N/A
---
## NETWORK BEHAVIOR
- Service Status: Firewalled / No Services
- Open Ports: None detected
- DNS Resolution: nat-18f.starnet.cz (forward confirmed)
- Reverse DNS: nat-18f.starnet.cz
- HTTP/TLS: No services detected
---
## NEIGHBORHOOD ANALYSIS
- Subnet: 109.164.53.18/24
- Abuse Density: 0%
- Classification: Clean
- Total Siblings: 1
- Threat Siblings: 0
- Active Siblings: 0
Assessment: Clean subnet with no malicious activity detected among neighboring IPs.
---
## OBSERVATION HISTORY
- Total Observations: 16
- Recent Activity: 2026-07-26 (4 observations)
- Ownership Changes: 0
- Threat Persistence Days: 0
- Persistently Malicious: No
Historical Trend: Consistent clean classification across all observations. No changes in network role, geolocation, or threat indicators.
---
## RELATIONSHIP MAPPING
- DNS Associations: nat-18f.starnet.cz (x3)
- Network Affiliation: STARNET_CZ (x2)
- Certificate Matches: 0
---
## THREAT INDICATORS
- Campaign Likelihood: N/A
- Known Campaigns: None
- Cert Matches: 0
- Correlated IPs: 0
---
## RECOMMENDED ACTIONS
No immediate action required. This IP represents legitimate infrastructure with no malicious indicators.
SOC Monitoring Notes:
- Monitor for service activation if previously inactive
- No firewall rules required based on current profile
- No threat intelligence alerts triggered
- Subnet classification remains clean
---
Report Generated: IPDebrief Intelligence Platform
Confidentiality: Internal Use Only
This summary was generated by AI and may contain inaccuracies. Verify critical details independently.
🏢 Ownership & Registration
| Organization | MNT-CZSTARNET |
| ASN | AS44489 |
| Network Name | STARNET_CZ |
| CIDR Block | 109.164.32.0/19 |
| RIR | ARIN |
| Country | CZ |
| Abuse Contact | Available via RDAP |
🌐 DNS Intelligence
| PTR | nat-18f.starnet.cz |
| Forward Confirmed | Yes — FCrDNS verified |
| Forward Hostnames | nat-18f.starnet.cz |
🔐 DNS Hygiene
| Hygiene Score | 80% (Excellent) |
| SPF | Present |
| DMARC | Present |
| FCrDNS | Verified |
| DNSSEC | Valid |
| CAA | Not configured |
☁️ Network Classification
| Infrastructure | Unknown |
| Service Purpose | Firewalled / No Services |
| Network Tier | Tier 3 — Basic operator with some routing infrastructure |
🔌 Services & Open Ports
| Port | Service | Protocol | Banner |
|---|---|---|---|
| No open ports detected | |||
| Closed Ports | 22, 25, 80, 443, 3389, 8080, 8443 (0 open / 7 scanned) | ||
| Server | — |
| HTTP Title | — |
🔐 TLS Certificate
| SANs | None |
| Valid From | — |
| Valid Until | — |
🛡️ Public Network Snapshot
| Origin ASN | AS44489 |
| Network Prefix | 109.164.0.0/17 |
| Route mapping | Found |
🎯 Confidence Breakdown
Per-dimension confidence scores based on source diversity and data freshness
| Dimension | Score | Sources | Observations |
|---|---|---|---|
| threat | 23% | 2 | 4 |
| routing | 8% | 1 | 1 |
| services | 12% | 2 | 2 |
| ownership | 17% | 2 | 3 |
| reputation | 8% | 1 | 2 |
| geolocation | 20% | 2 | 2 |
| Overall | 15% | 10 | 14 |
| Data Coherence | Consistent (100%) |
| Attribution | Moderate (70%) |
| OwnershipFCrDNSGeo ConsensusGeo PlausibleIRR MatchRPKI Valid |
📅 Observation Timeline 🔄 Live
| First Seen | 2026-07-12 02:46:02 UTC |
| Last Seen | 2026-09-02 15:14:41 UTC |
| Profile Built | 2026-09-02 15:16:38 UTC |
| Data Freshness | Live |
| Signal Types | 20 |
| Total Observations | 24 |
Full dossier details are available via our API.
❓ Frequently Asked Questions About 109.164.53.18
Who owns the IP address 109.164.53.18?
109.164.53.18 is registered to MNT-CZSTARNET. The address falls within the 109.164.32.0/19 network block. Registration is held at ARIN.
Where is 109.164.53.18 located?
Geolocation data places 109.164.53.18 in České Budějovice, South Bohemian Region, Czechia. The local time zone is Europe/Prague. IP geolocation is approximate and indicates the network's registered or routed location rather than a precise physical address.
Is 109.164.53.18 malicious or safe?
109.164.53.18 currently carries a low risk assessment, meaning no significant threat indicators have been observed. This assessment is generated from continuously collected signals and can change over time.
What is the hostname for 109.164.53.18?
The reverse DNS (PTR) record for 109.164.53.18 is nat-18f.starnet.cz. This hostname is forward-confirmed, meaning it resolves back to the same address.