191.240.96.81
IP Intelligence Briefing: 191.240.96.81/32
*Generated via IPDebrief tools (June 2026)*
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**1. Risk Profile**
- Overall Risk: Moderate (Risk Score: 55)
- Ownership: Owned by MASTER S/A (ASN 28202) in Brazil (BR).
- Geolocation: Pará de Minas, Minas Gerais, Brazil.
- Threat Indicators: No malware, phishing, or spam activity detected.
- Network Role: Firewalled with no open services (no TLS/HTTP/SSH ports).
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**2. Observation History**
- Recent Activity:
- BGP prefix 191.240.0.0/17 registered to MASTER S/A (2013).
- Subnet 191.240.96.81/24 has a 4.3% abuse density (1 high-risk, 20 medium-risk, 2 low-risk neighbors).
- No persistent malicious activity or repeated threats observed.
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**3. Relationships & Dependencies**
- DNS Associations: Linked to 191-240-96-81.prs-wr.mastercabo.com.br (no malicious domains).
- Network Context:
- Part of AS28202 (MASTER S/A) with 21 sibling IPs in the subnet.
- High-risk neighbors: 191.240.96.82 (Risk: 80), 191.240.96.216 (Risk: 70), 191.240.96.172 (Risk: 70).
- DNSBL Listings: Listed in 3 DNSBLs (low-severity abuse).
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**4. Network Behavior**
- Subnet Analysis:
- Abuse Density: 4.3% (mixed classification).
- Active IPs: 6 out of 21 siblings are active.
- Risk Inheritance: 17% of subnet’s risk score.
- Traffic Patterns:
- No open ports or services detected (scanned ports: none).
- DNSSEC valid, but no email auth (SPF/DKIM) configured.
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**5. Recommendations**
- Monitor Subnet: High-risk neighbors (e.g., 191.240.96.82) may indicate broader network compromise.
- Block High-Risk IPs: Consider isolating or blocking IPs with elevated risk scores (e.g., 191.240.96.82).
- Verify DNS: Investigate the domain mastercabo.com.br for potential spoofing or phishing activity.
- Update Policies: Adjust firewall rules to restrict traffic from this subnet if internal systems are exposed.
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*Note: No direct malicious activity detected, but contextual risks exist due to neighboring IPs and DNSBL listings.*
This summary was generated by AI and may contain inaccuracies. Verify critical details independently.
🏢 Ownership & Registration
| Organization | MASTER S/A |
| ASN | AS28202 |
| Network Name | 213404 |
| CIDR Block | 191.240.0.0/17 |
| RIR | LACNIC |
| Country | BR |
| Abuse Contact | — |
🌐 DNS Intelligence
| PTR | 191-240-96-81.prs-wr.mastercabo.com.br |
| Forward Confirmed | No — PTR hostname does not resolve back to this IP (weak signal) |
| Forward Hostnames | 191-240-96-81.prs-wr.mastercabo.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 | |||
| Closed Ports | 22, 25, 80, 443, 3389, 8080, 8443 (0 open / 7 scanned) | ||
| 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 | 28% | 2 | 4 |
| routing | 21% | 1 | 2 |
| services | 15% | 2 | 2 |
| ownership | 19% | 2 | 2 |
| reputation | 26% | 1 | 3 |
| geolocation | 30% | 2 | 3 |
| Overall | 23% | 10 | 16 |
| Data Coherence | Consistent (100%) |
| Attribution | Moderate (50%) |
| OwnershipFCrDNSGeo ConsensusGeo PlausibleIRR MatchRPKI Valid |
📅 Observation Timeline 🔄 Live
| First Seen | 2026-05-07 23:04:03 UTC |
| Last Seen | 2026-06-23 02:26:46 UTC |
| Profile Built | 2026-06-23 02:37:52 UTC |
| Data Freshness | Live |
| Signal Types | 21 |
| Total Observations | 25 |
Full dossier details are available via our API.