216.151.138.198📋 Copy

# IP Intelligence Briefing: 216.151.138.198/32

Classification: Low Risk - Cisco Webex Infrastructure

Generated: 2026-06-24

## Executive Summary

IP address 216.151.138.198 is a Cisco Webex LLC infrastructure endpoint located in San Jose, CA. The IP presents low individual risk (score 30/100) with no active threat indicators. While the /24 neighborhood exhibits elevated abuse density, this specific endpoint remains benign with no services exposed.

## Key Findings

Ownership & Network Classification

• Organization: Cisco Webex LLC (ASN 13445)
• Network: 216.151.128.0/20 (ARIN)
• Geolocation: San Jose, California, United States
• Infrastructure Type: Corporate/CDN infrastructure (firewalled, no public services)
• Control Plane: Valid RPKI, stable route (no recent changes)

Risk Profile

• Individual Risk Score: 30/100 (Low Risk)
• Abuse Confidence: Not applicable (legitimate infrastructure)
• Blacklist Status: Listed on 1 of 8 threat feeds (minor concern)
• Threat Indicators: None detected (not attacker, spam source, or Tor exit)

Services & Exposure

• Open Ports: None detected
• DNS Records: No PTR hostnames or reverse resolution
• SSL/TLS: No certificates or services exposed
• Network Role: Firewalled / No Services (expected for backend infrastructure)

## Neighborhood Context

• Subnet: 216.151.138.0/24
• Abuse Density: 1 (moderate)
• Active Siblings: 161 out of 256 IPs
• Neighbor Risk Distribution: 70 medium, 30 low, 0 high
• Inherited Risk Score: 40/100 (neighborhood-level concern)

## Observation History

• Total Signals: 56 observations
• Recent Activity: Consistent ASN and geolocation reporting from 2026-06-24
• Threat Persistence: 0 days (not persistently malicious)
• Pattern: Stable corporate infrastructure with no anomalous behavior

## Relationships

• Same Network Relationships: 500 relationships identified (primarily CS-1711 network)
• Associated Entities: Cisco Webex infrastructure components
• Correlated IPs: None identified as malicious

## Recommended Actions

Firewall Rules

No blocking recommended. This IP represents legitimate Cisco Webex infrastructure.

Monitoring Guidelines

• Accept Traffic: Allow standard connectivity from Cisco Webex IPs
• Log Analysis: Monitor for unusual outbound connections if this IP appears to initiate traffic
• Threat Intel Correlation: Cross-reference with Cisco threat advisories

SOC Analyst Notes

This IP is part of Cisco's enterprise security infrastructure. The single DNSBL listing is likely a false positive or historical artifact. The elevated neighborhood risk score reflects general abuse activity in the /24 subnet but does not indicate specific compromise of this endpoint. No immediate threat action required.

Status: CLEAR - Legitimate Infrastructure Endpoint

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