83.135.15.74📋 Copy

# IP Intelligence Briefing: 83.135.15.74/32

Classification: Low Risk / Residential Infrastructure

Date: Current Analysis

Analyst: IPDebrief Intelligence Operations

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## Executive Summary

IP address 83.135.15.74 is assigned to 1&1 Versatel GmbH (ASN 8881) within the DE-VERSATEL-20040128 network block (83.135.0.0/16). Current risk assessment indicates LOW RISK with a risk score of 25/100. The IP is geolocated to Leipzig, Saxony, Germany and is configured with active firewalling (no open services detected). The subnet demonstrates clean abuse density with minimal threat indicators.

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## Technical Profile

Network Ownership & Classification

• Organization: 1&1 Versatel GmbH
• ASN: 8881
• CIDR Block: 83.135.0.0/16
• RIR: Ripe
• Network Role: Residential/Consumer Infrastructure
• Service Status: Firewalled / No Services Exposed

Geolocation

• Country: Germany (DE)
• Region: Saxony
• City: Leipzig
• Coordinates: 51.17°N, 10.45°E
• Accuracy: 400km radius
• Geo-Validation: Consensus confirmed across multiple sources

DNS Infrastructure

• PTR Record: i53870F4A.versanet.de
• Forward Resolution: Confirmed (versanet.de domain)
• Email Auth: SPF record present, DMARC not configured
• DNSSEC: Valid

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## Threat Assessment

Risk Indicators

• Risk Score: 25/100 (Low)
• Abuse Confidence: Not applicable (no active threats)
• Blacklist Status: Listed on 1 of 8 DNSBLs (max severity: high)
• Known Attacker: No
• Spam Source: No
• Tor Exit Node: No
• Campaign Correlations: None detected

Control Plane Analysis

• BGP Prefix: 83.135.0.0/20
• Route Stability: False
• MOAS: No
• RPKI State: Not evaluated
• IRR Consistency: Not evaluated

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## Observation History

Total Observations: 17 signals tracked

Recent Activity Timeline:

• 2026-07-26 19:41:24 – Port scan activity detected (confidence: 70%)
• 2026-07-26 19:40:25 – Geolocation inference: DE, Leipzig (confidence: 52%)
• 2026-07-26 19:39:48 – ASN/RIR identification: 1&1 Versatel GmbH (confidence: 90-95%)
• 2026-07-26 19:39:41 – Blacklist correlation: 1 listing with high severity flag

The IP demonstrates persistent monitoring across standard threat intelligence categories (geolocation, ASN, DNS, blacklist status). No escalation in threat behavior observed over observation period.

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## Neighborhood Analysis

Subnet: 83.135.15.0/24

Abuse Density: 0.0 (Clean)

Risk Classification: Clean

Sibling IP Risk Distribution:

The /24 subnet maintains low abuse density with minimal threat indicators. No high-risk siblings detected.

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## Network Relationships

Identified Associations:

• DNS Hostname: i53870F4A.versanet.de (forward confirmed)
• Network Entity: DE-VERSATEL-20040128
• Provider: 1&1 Versatel GmbH (ASN 8881)

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## Recommended Actions

Based on current risk profile, the following security actions are recommended:

1. Firewall Rule: Allow inbound traffic from 83.135.0.0/16 with standard logging. No immediate block required.

2. DNSBL Monitoring: Monitor the 1 active DNSBL listing for potential reputation changes.

3. Email Security: Note absence of DMARC record on versanet.de domain for email validation.

4. Neighborhood Watch: Monitor sibling IP 83.135.15.236 (risk score 40) for correlation activity.

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## Conclusion

IP 83.135.15.74 represents low-risk residential infrastructure within a clean subnet. The single DNSBL listing and high-severity flag warrant continued observation but do not indicate active malicious use. No immediate threat mitigation required. Standard defensive monitoring procedures are appropriate.

Clearance: Review Complete

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