187.34.131.123📋 Copy

# IP INTELLIGENCE BRIEFING

Target: 187.34.131.123/32

Classification: Low Risk / Residential ISP Infrastructure

Date: 2026-07-25

Analyst: IPDebrief Intelligence Team

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## EXECUTIVE SUMMARY

IP 187.34.131.123 is a residential telecommunications endpoint operated by TELEFÔNICA BRASIL S.A (AS27699). The IP exhibits a low overall risk profile (risk score: 15/100) with no active threat indicators. The address resolves to a firewalled endpoint with no open services, classified as residential ISP infrastructure. Historical observations indicate stable ownership and minimal threat activity.

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## OWNERSHIP & GEOLOCATION

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## NETWORK CLASSIFICATION

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## THREAT INTELLIGENCE

Threat Indicators: None detected

Blacklist Count: 0

Abuse Confidence Score: Not applicable

Pulsedive Risk: Not applicable

Known Campaigns: None

Threat Feeds: None

Control Plane Data:

• DNSBL Listed: 1 of 8 total lists
• Route Stability: Unstable
• Operator Score: 0.1304 (Minimal)
• RPKI/Irr Consistency: Not evaluated

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## DNS & EMAIL REPUTATION

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## NEIGHBORHOOD ANALYSIS (Subnet: 187.34.131.0/24)

Neighbor Risk Distribution:

• High Risk: 0
• Medium Risk: 3
• Low Risk: 3

Notable Neighbors:

• 187.34.131.129: Risk Score 40
• 187.34.131.182: Risk Score 40
• 187.34.131.196: Risk Score 40

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## OBSERVATION HISTORY

Total Observations: 16

Latest Signal: 2026-07-25 09:42 UTC

Recent Signal Types:

1. Subnet Analysis (Confidence: 75%) - Abuse density 0.1429, mostly_clean classification

2. Geolocation (Confidence: 95%) - Brazil, LACNIC RIR, 187.34.0.0/15 CIDR

3. Geographic Threat (Confidence: 75%) - Multiple threat pulses detected in region

4. Geolocation Variance (Confidence: 35%) - Geographic inconsistencies observed

5. Blacklist Detection (Confidence: 85%) - Listed on 1 of 8 threat lists (medium severity)

Temporal Analysis:

• Ownership Changes: 0
• Threat Persistence Days: 0
• Is Persistently Malicious: False
• Threat Observation Count: 0

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## RELATED ENTITIES

1. Network: 126543 (TELEFÔNICA BRASIL S.A)

2. DNS Hostnames: 187-34-131-123.dsl.telesp.net.br (2 associations)

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## TRACEROUTE ANALYSIS

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## RECOMMENDED ACTIONS

Based on the IP's low-risk profile and residential classification, no immediate blocking actions are recommended. The IP does not exhibit characteristics of malicious infrastructure. Standard residential ISP traffic handling applies.

Firewall/Security Recommendations:

• No blocking required
• Standard residential traffic rules apply
• Monitor if unexpected behavior is observed

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## ANALYST NOTES

The target IP represents typical residential broadband infrastructure from a major Brazilian telecom provider. The single threat listing observed (medium severity) may represent historical or false-positive detection. The subnet shows moderate abuse density (14.29%) with three medium-risk neighbors, which is consistent with residential ISP environments. No correlation with known malicious campaigns or active threat actors was detected.

Confidence Level: High

Threat Severity: Low

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