109.136.87.39📋 Copy

# IP Intelligence Briefing: 109.136.87.39

Classification: Low Risk / Residential Mobile

Generated: 2026-07-29

Status: Active Monitoring

## Executive Summary

IP address 109.136.87.39 is a low-risk residential mobile endpoint associated with Belgian carrier Proximus. No malicious activity, open services, or threat indicators detected. The IP demonstrates stable network infrastructure characteristics with clean neighborhood classification.

## Network Infrastructure Profile

## Network Role Classification

• Primary Type: Mobile Carrier Endpoint
• Mobile Carrier: Proximus (MCC: 206, MNC: 01)
• Connection Technology: LTE/5G
• Infrastructure: Firewalled / No Active Services
• Open Ports: None detected
• DNS Type: Dynamic (39.87-136-109.fia-dyn.isp.proximus.be)

## Threat Assessment

Threat Indicators: None

• Blacklist Count: 0
• Abuse Confidence Score: N/A
• Known Campaigns: None
• Tor Exit Node: No
• Known Attacker: No
• Spam Source: No
• Reputation Sources: None

Security Services:

• Email Authentication: SPF and DMARC configured
• TLS Certificates: None (no web services)
• HTTP Banner: None

## Geographic Validation

• Location: Brussels, Belgium
• Coordinates: 50.5°N, 4.47°E
• Geo Confidence: Moderate (0.52)
• Validation Method: Multi-signal inference
• RTT Analysis: Avg 105.6ms from probe locations
• Plausibility: Valid (236.8km from minimum RTT location)

## Network Stability Analysis

• BGP Prefix: 109.136.0.0/16
• AS Path: 3303 → 5432
• Route Stability: Unstable (2 changes in 30 days)
• MOAS Status: No
• RPKI State: Not verified
• IRR Consistency: Not checked
• Route Origin ASN: 5432

## Relationship Graph

Connected Entities (8 total):

• Network Associations: BE-BELGACOM-20090727 (multiple entries)
• DNS Associations: 39.87-136-109.fia-dyn.isp.proximus.be (4 entries)

## Neighborhood Analysis (109.136.87.0/24)

• Total Siblings: 1
• Active Siblings: 0
• Threat Siblings: 0
• Abuse Density: 0 (Clean)
• Classification: Clean
• Inherited Risk: 0

## Historical Signal Analysis

Observations: 21 signals tracked

• ASN Consistency: Stable (allocated since 1995-10-23)
• Ownership Changes: 0
• Threat Persistence: 0 days
• Threat Observation Count: 0
• Persistent Malicious Activity: False

Recent Observations (2026-07-29):

• ASN allocation status: Allocated (11,237 days)
• BGP route changes: 2 in 30-day window
• Geographic location: Belgium (confirmed)
• Network role: Not mobile in this specific observation (inconsistency noted)

## Recommended Actions

Based on risk profile and threat assessment:

1. Firewall Rules: No blocking required. Monitor as legitimate endpoint.

2. IDS/IPS: Standard residential/mobile signature rules apply.

3. Threat Intelligence: No enrichment needed. No correlation to known campaigns.

4. Geographic Filtering: Belgium endpoint – verify against business requirements.

## Conclusion

IP 109.136.87.39 represents a legitimate mobile subscriber address from Belgian carrier Proximus. The endpoint demonstrates clean security posture with no malicious indicators, no open services, and no neighborhood abuse. The BGP route instability is a network infrastructure characteristic rather than a security concern. No defensive action required beyond standard monitoring.

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