216.151.137.226📋 Copy

# IPDEBRIEF INTELLIGENCE BRIEFING

Target: 216.151.137.226/32

Classification: MODERATE RISK

Date: 2026-06-24

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## EXECUTIVE SUMMARY

IP address 216.151.137.226 is assigned to Cisco Webex LLC (ASN 13445) with a risk score of 40. The IP is located in New York, US, and is classified as "Firewalled / No Services" with no active open ports. Despite enterprise infrastructure ownership, the IP appears in a subnet showing elevated abuse density (216.151.137.0/24), with 51 medium-risk and 49 low-risk neighboring IPs. No direct threat indicators, blacklists, or known campaigns were observed.

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## OWNERSHIP & INFRASTRUCTURE

The IP resides within the Cisco Webex infrastructure BGP prefix 216.151.128.0/20, indicating legitimate enterprise allocation. Control plane data shows origin ASN 13445 with stable routing (isMoas: false).

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## THREAT ASSESSMENT

Current Risk Score: 40 (Moderate)

Operator Score: 0.2174 (Minimal)

Threat Indicators:

• Blacklist Count: 0
• DNSBL Listed Count: 0
• Known Attacker: False
• Tor Exit Node: False
• Spam Source: False
• Active Threat Indicators: None detected

Neighborhood Risk Analysis:

• Subnet: 216.151.137.0/24
• Neighbors Analyzed: 100
• Risk Distribution: 0 High / 51 Medium / 49 Low
• Abuse Density: 0.3008 (Mixed)
• Inherited Risk: 12

The /24 subnet demonstrates moderate abuse activity with significant risk concentration among medium-risk neighbors.

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## OBSERVATION HISTORY

Total Observations: 49 signals recorded

Recent Signal Activity:

• Certificate Signals: 0 certificates resolved (crt-sh)
• Subnet Analysis: Recent observations show abuse_density 0.3008 with classification "mixed" and 77 threat siblings in the subnet
• Geolocation: Multiple sources confirm US location with 2500km accuracy radius
• Blacklist Activity: High-severity blacklist listing detected in one observation

Temporal Analysis:

• Ownership Changes: 0
• Threat Persistence Days: 0
• Threat Observation Count: 1
• Persistently Malicious: False

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## NETWORK RELATIONSHIPS

Total Relationships: 264 detected

Primary Relationship Types:

• Same Network (CS-1711): 259+ relationships

The IP maintains extensive network-level relationships within the Cisco Webex infrastructure, primarily through network routing associations (CS-1711 network).

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## RECOMMENDED ACTIONS

Based on risk profile analysis, the following defensive measures are recommended:

Implementation Notes: These recommendations are probabilistic. Consider combining with additional threat intelligence signals before deployment, particularly given the enterprise infrastructure ownership.

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## INTELLIGENCE NOTES

• No open services detected on the target IP
• DNS resolution not confirmed (forwardConfirmed: false)
• Email reputation scoring unavailable
• Geographic validation inconclusive due to ICMP blocking
• The subnet's elevated abuse density suggests broader infrastructure compromise risk despite legitimate ownership

Analyst Recommendation: Monitor subnet-level activity. While individual IP shows no direct threats, the neighborhood risk profile warrants ongoing observation for lateral movement or infrastructure abuse patterns.

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