131.100.84.133📋 Copy

## IP Intelligence Briefing: 131.100.84.133/32

Executive Summary

IP 131.100.84.133 is a low-risk infrastructure address belonging to SEMPRE TELECOMUNICACOES LTDA (ASN 28198). The asset shows minimal threat indicators, with a risk score of 25/100 and no active malicious activity observed. Classification: Low Risk / Clean.

Ownership & Network Classification

• Organization: SEMPRE TELECOMUNICACOES LTDA
• ASN: 28198 (BR)
• CIDR: 131.100.84.0/22
• Geolocation: Divinópolis, Minas Gerais, Brazil
• Network Role: Firewalled infrastructure with no exposed services
• Registration: ARIN registry

Threat Indicators Assessment

• Risk Score: 25 (Low Risk)
• Blacklist Status: Listed on 1 of 8 DNSBL feeds
• Threat Indicators: None detected
• Known Campaigns: None
• Tor Exit: No
• Known Attacker: No
• Spam Source: No

Network Behavior Analysis

• Open Ports: None detected
• DNS Records: PTR resolves to 131-100-84-133.sempre.tec.br
• DNSBL Listing: Minimal (1 of 8 lists)
• Control Plane: Operator score 0.2609 (Basic classification)
• Route Stability: Unstable (route changes observed)
• Dnssec Valid: Yes

Historical Observations

Analysis of 15 historical signals reveals:

• Consistent ownership attribution to SEMPRE TELECOMUNICACOES LTDA
• No threat persistence detected
• No malicious activity patterns observed
• Stable geolocation data over time
• Recent observations (July 2026) confirm infrastructure status

Relationship Mapping

• DNS Associations: 131-100-84-133.sempre.tec.br
• Network References: 402919 (402919/22)
• External Links: None identified
• Certificates: None associated

Neighborhood Intelligence

• Subnet: 131.100.84.133/24
• Abuse Density: 0.0 (Clean)
• Threat Siblings: 0
• Active Siblings: 0
• Classification: Clean infrastructure subnet

SOC Actionable Recommendations

1. Allow/Block Decision: No immediate action required. IP shows legitimate infrastructure characteristics.

2. Monitoring: Continue standard monitoring. DNSBL listing warrants periodic review.

3. Firewall Rules: No specific blocking recommended. Standard egress controls apply.

4. Threat Hunting: Not a priority target for active threat hunting.

5. Investigation Trigger: Only investigate if associated with anomalous traffic patterns or observed in suspicious connection logs.

Conclusion

131.100.84.133 is classified as a low-risk, legitimate Brazilian telecommunications infrastructure IP with no evidence of malicious activity. The single DNSBL listing represents minimal concern and may be related to historical scanning activity. No immediate security actions required. Standard network policies apply.

This summary was generated by AI and may contain inaccuracies. Verify critical details independently.