81.17.18.50📋 Copy

# IP Intelligence Briefing: 81.17.18.50/32

Date: 2026-07-28

Classification: Moderate Risk (Score: 55)

Status: No Active Threat Indicators

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## Executive Summary

IP 81.17.18.50 registers a moderate risk profile (55/100) with no active malicious indicators. The address resolves to Switzerland (Zurich) under ASN 51852 (Milciades Garcia) and associates with PTR hostname block1-che.interlayer.co.uk. No open ports or active services detected. The subnet environment is classified as clean with zero abuse density.

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## Technical Profile

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## Network Characteristics

Routing:

• BGP Origin: 81.17.16.0/20
• AS Path: 34549 → 43440 → 51852
• Route Stability: Unstable (1 change observed in 30-day window)
• MoAS: No
• Operator Score: 0.2174 (Minimal)
• DNSSEC: Valid

Connectivity:

• Hop Count: 18
• First Hop RTT: 0.2ms
• Last Hop RTT: 115.2ms
• Geographic Consensus: Valid (plausible coordinates confirmed)

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## Threat Intelligence

Indicators:

• Tor Exit Node: No
• Known Attacker: No
• Spam Source: No
• Campaign Correlation: None detected
• Certificates: None detected

Historical Signals (28 observations):

• Recent ASN resolution signals (07:59 UTC, 2026-07-28)
• Route stability signals (07:59 UTC, 2026-07-28)
• General signal observation (13:15 UTC, 2026-07-28)

Temporal Analysis:

• Ownership Changes: 0
• Threat Persistence Days: 0
• Is Persistently Malicious: No

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## Subnet Neighborhood Analysis

Subnet: 81.17.18.50/24

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

No neighboring IPs flagged for abuse or malicious activity detected.

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## Relationship Graph

Network Associations:

• Multiple same-network relationships to NATHAN_HENDERS

DNS Associations:

• block1-che.interlayer.co.uk (10 relationship instances)

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## Observations & Recommendations

Key Findings:

1. No active services or open ports detected (Firewalled / No Services)

2. DNSBL presence (3/8 lists) indicates historical reputation concerns

3. Route instability detected (1 BGP change in 30 days)

4. Subnet environment is clean with no sibling threats

5. PTR hostname suggests interlayer.co.uk infrastructure association

Recommended Actions:

• Monitor DNSBL listings for changes
• Verify BGP route changes if route instability impacts operations
• Standard traffic monitoring recommended due to moderate risk score
• No immediate blocking required; observe traffic patterns

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Source: IPDebrief Intelligence Platform

Data Sufficiency: 16 sources across 7 dimensions

Confidence Level: 40% overall

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