138.255.206.224📋 Copy

# Intelligence Briefing: 138.255.206.224

## Executive Summary

IP address 138.255.206.224 is classified as High Risk (Risk Score: 80) with a reputation profile indicating malicious activity. The IP is associated with Brazilian infrastructure under CIT INFORMATICA (ASN 263983) and is currently firewalled with no active services.

## Ownership and Network Context

• Organization: CIT INFORMATICA
• ASN: 263983
• CIDR Block: 138.255.204.0/22
• Geolocation: Santa Catarina, Brazil (BR)
• Registration: ARIN

## Threat Assessment

• Risk Score: 80 (High Risk)
• Blacklist Status: Listed on 4 of 8 DNSBL lists
• Operator Score: 0.1304 (Minimal operator reputation)
• Threat Indicators: No active threat indicators detected (not Tor exit, not known attacker, not spam source)
• Network Role: Firewalled / No Services

## Technical Profile

• Open Ports: None detected
• DNS Resolution: No forward resolution; PTR records absent
• TLS/HTTP: No certificates, no HTTP headers detected
• Route Stability: Unstable (isRouteStable: false)
• BGP Prefix: 138.255.206.0/24

## Neighborhood Analysis

The /24 subnet (138.255.206.0/24) contains 35 total IPs with 24 active siblings:

• Abuse Density: 0.0571 (moderate)
• Classification: Mostly clean
• Threat Siblings: 2 IPs identified as threats
• Risk Distribution: 1 high-risk, 31 medium-risk, 2 low-risk neighbors
• Notable Neighbor: 138.255.206.220 (Risk Score: 80, same risk level as target)

## Observation History

Fourteen observations recorded from 2026-07-25:

• Most recent signals indicate geolocation (Brazil), subnet classification (mostly_clean), and minimal operator score
• No persistent malicious activity detected (threat_persistence_days: 0)
• Single threat observation recorded

## Recommended Actions

Immediate: Monitor for outbound connections; current firewalled state limits direct service enumeration.

Firewall Rules: Block inbound traffic to this IP; monitor for outbound connections to/from this IP.

Threat Hunting: Investigate 138.255.206.220 (same high-risk profile in same subnet).

Subnet Monitoring: Apply monitoring controls to the 138.255.206.0/24 block due to elevated abuse density (0.0571).

## Conclusion

The target IP represents a high-risk address with active blacklist listings but no open services. While the immediate threat is contained by firewalled status, the subnet exhibits elevated abuse density with multiple high-risk neighbors. Recommend continued monitoring and subnet-level controls.

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