189.39.138.78📋 Copy

# IP Intelligence Briefing: 189.39.138.78/32

Classification: Low Risk / Infrastructure

Date: 2026-07-26

Analyst: IPDebrief Intelligence

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## Executive Summary

IP address 189.39.138.78 is a low-risk infrastructure endpoint registered to MICRON LINE SERVICOS DE INFORMATICA LTDA - ME (AS28183) in Brazil. The IP shows no active threat indicators, no open services, and no association with known malicious campaigns. The subnet demonstrates minimal abuse density with two medium-risk neighbors identified.

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## Ownership & Network Attribution

Geolocation: Brazil, Espírito Santo, Irupi (-20.33, -41.66)

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## Threat Assessment

Risk Score: 0/100 (Low Risk)

Abuse Confidence Score: Not applicable

Blacklist Count: 0

DNSBL Listings: 0 (despite 8 associated lists)

Threat Indicators

• Tor Exit Node: No
• Known Attacker: No
• Spam Source: No
• Campaign Association: None detected
• Threat Persistence: None (1 threat observation only)
• Is Persistently Malicious: No

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## Network Role & Service Profile

• Infrastructure Type: Not classified (provider/hosting/proxy/VPN/CDN/Cloud: No)
• Service Purpose: Firewalled / No Services
• Open Ports: None detected
• TLS Certificate: None
• HTTP Title: None
• Server Banner: None
• Forward DNS Resolution: Not confirmed

Note: The IP appears to be a passive infrastructure endpoint with no publicly accessible services.

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## DNS Analysis

• PTR Hostnames: None
• Forward Resolution: 0 records
• Hosted Domains: 0
• Reverse DNS Zone: 78.138.39.189.in-addr.arpa
• DNSSEC Valid: Yes
• SPF/DMARC: Not applicable (no hosted domains)

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## Neighborhood Analysis (189.39.138.0/24)

Subnet Abuse Density: 0%

Total Siblings Analyzed: 4

Assessment: The subnet shows minimal threat concentration. Two neighboring IPs (189.39.138.6 and 189.39.138.49) carry medium-risk scores (40/100), suggesting potential legitimate infrastructure activity rather than coordinated malicious behavior.

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## Observation History (Last 12 Observations)

Recent activity from 2026-07-26 confirms stable ownership and network registration:

• ASN Resolution: AS28183 (MICRON LINE SERVICOS DE INFORMATICA LTDA - ME, BR)
• BGP Prefix: 189.39.138.0/24
• Ownership Stability: No changes observed
• Threat Persistence: None detected
• DNSSEC Validation: Consistently valid

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## Control Plane Analysis

• Origin ASN: 28183
• BGP Prefix: 189.39.138.0/24
• RPKI State: Not available
• IRR Consistency: Not available
• Route Stability: Not stable (route changes in 30 days: 0)
• DNSSEC Valid: Yes
• CNAME/CAA Records: Not detected

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## Behavioral Analysis

• Honeypot Hits: 0
• Enumeration Strikes: 0
• WAF Violations: 0
• Total Incidents: 0
• Categories: None detected

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## Recommended Actions

Current Risk Level: Low

Firewall Recommendations: No active recommendations generated

Analyst Notes

• No immediate blocking required based on current profile
• Monitor medium-risk neighbors (189.39.138.6, 189.39.138.49) if traffic patterns suggest escalation
• No active threat intelligence warrants immediate containment or blocking
• Consider baseline traffic analysis to establish normal patterns for this subnet

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Status: Monitor / No Action Required

Confidence Level: High (based on comprehensive data collection)

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