191.53.16.231
IP Intelligence Briefing: 191.53.16.231
*Generated via IPDebrief tools: Profile, History, Relationships, Neighbors*
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**1. Core Profile**
- Risk Score: 70 (High Risk)
- Ownership: Registered to MASTER S/A (ASN 28202, Brazil)
- Geolocation: Brazil (SP, Taubate), latitude -23.0732, longitude -45.4975
- Network Role: Firewalled / No Services (no open ports, TLS/HTTP inactive)
- Threat Indicators: No direct malicious indicators, but observation history notes "has threats" (ambiguous).
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**2. Observation History**
- Recent Activity (Last 30 Days):
- 17 signals recorded, including:
- Brazilian origin (Taubate, SP) with 0.75–0.90 confidence.
- DNSBL listings (4/8 lists, high-severity categories).
- Geolocation validation: 9,641.7 km from probe, RTT 159–162.6 ms.
- No persistent threats detected (threatObservationCount = 0).
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**3. Relationships**
- Network Associations:
- Linked to subnet 227148 (AS28202, MASTER S/A).
- DNS: PTR hostname 191-53-16-231.vga-wr.soumaster.com.br (repeatedly resolved).
- No connections to known malicious organizations or campaigns.
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**4. Neighborhood Analysis**
- Subnet: 191.53.16.231/24
- Neighbor Data:
- 0 active neighbors reported.
- Subnet abuse density: 0% (no risky sibling IPs).
- Isolated IP with no adjacent network activity.
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**5. Key Findings & Recommendations**
- High Risk: Despite no direct threats, the IP’s risk score and DNSBL listings suggest potential abuse.
- Geolocation Discrepancy: While geolocated to Brazil, the IP’s firewalled nature and lack of services may indicate a honeypot or misconfigured server.
- DNS Anomalies: Repeated DNS resolution to soumaster.com.br could signal misconfigured DNS or a spoofed host.
- Neighbor Isolation: Zero neighbors may indicate a single-host network or a low-traffic server.
SOC Action:
- Monitor DNSBL listings for updates.
- Investigate the PTR hostname (soumaster.com.br) for associated risks.
- Validate the IP’s geolocation and network behavior for anomalies.
- Consider blocking the IP if it persists in scanning or anomalous traffic.
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*Data sourced from IPDebrief. Use with operational security protocols.*
This summary was generated by AI and may contain inaccuracies. Verify critical details independently.
🏢 Ownership & Registration
| Organization | MASTER S/A |
| ASN | AS28202 |
| Network Name | 227148 |
| CIDR Block | 191.53.0.0/16 |
| RIR | LACNIC |
| Country | BR |
| Abuse Contact | — |
🌐 DNS Intelligence
| PTR | 191-53-16-231.vga-wr.soumaster.com.br |
| Forward Confirmed | No — PTR hostname does not resolve back to this IP (weak signal) |
| Forward Hostnames | 191-53-16-231.vga-wr.soumaster.com.br |
🔐 DNS Hygiene
| Hygiene Score | 20% (Poor) |
| SPF | Not configured |
| DMARC | Not configured |
| FCrDNS | Not verified |
| DNSSEC | Valid |
| CAA | Not configured |
☁️ Network Classification
| Infrastructure | Unknown |
| Service Purpose | Firewalled / No Services |
| Network Tier | Unknown — Insufficient routing data to classify |
🔌 Services & Open Ports
| Port | Service | Protocol | Banner |
|---|---|---|---|
| No open ports detected | |||
| Server | — |
| HTTP Title | — |
🔐 TLS Certificate
| SANs | None |
| Valid From | — |
| Valid Until | — |
🎯 Confidence Breakdown
Per-dimension confidence scores based on source diversity and data freshness
| Dimension | Score | Sources | Observations |
|---|---|---|---|
| threat | 13% | 1 | 1 |
| routing | 19% | 1 | 2 |
| services | 13% | 1 | 1 |
| ownership | 19% | 2 | 2 |
| reputation | 0% | 0 | 0 |
| geolocation | 13% | 1 | 1 |
| Overall | 13% | 6 | 7 |
| Data Coherence | Consistent (100%) |
| Attribution | Moderate (50%) |
| OwnershipFCrDNSGeo ConsensusGeo PlausibleIRR MatchRPKI Valid |
📅 Observation Timeline 🔄 Live
| First Seen | 2026-05-24 12:34:28 UTC |
| Last Seen | 2026-06-20 18:05:27 UTC |
| Profile Built | 2026-06-10 15:33:36 UTC |
| Data Freshness | Live |
| Signal Types | 19 |
| Total Observations | 23 |
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