38.3.133.77📋 Copy

# INTELLIGENCE BRIEFING: 38.3.133.77/32

Classification: LOW RISK

Report Date: Current

Analyst: IPDebrief Intelligence Unit

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## EXECUTIVE SUMMARY

IP address 38.3.133.77 is assigned to Cogent Communications, LLC (AS274614) within the COGENT-A network. The asset presents a low-risk profile with zero threat indicators, zero blacklist listings, and no observed malicious activity. Geolocation data exhibits moderate inconsistency between current profile (Brazil) and historical observations (US), warranting continued monitoring.

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## ASSET PROFILE

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## THREAT INTELLIGENCE

Threat Status: CLEAN

• Blacklist Count: 0
• Known Attacks: None
• Spam Source: No
• Tor Exit Node: No
• Active Campaigns: None
• Threat Feeds: Empty

Network Behavior:

• No open ports detected
• No TLS certificates or HTTP services observed
• DNS forward resolution: Not confirmed
• PTR records: None
• Email authentication: No SPF/DMARC records

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## OBSERVATION HISTORY

Total Observations: 12

Latest Signal Date: 2026-07-29

Signal Summary:

• Geolocation: Mixed signals (US in historical data, Brazil in current profile; confidence 0.35)
• DNSSEC: Valid (confidence 0.90)
• Blacklist Monitoring: 8 total lists monitored, 0 current listings
• ASN Information: Consistent with AS274614

Temporal Analysis:

• Ownership changes: 0
• Threat persistence days: 0
• Threat observation count: 0
• Persistently malicious: False

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## NETWORK RELATIONSHIPS

Connected Entities: 1

• COGENT-A (Network) — Same network classification

Cross-Reference: No additional relationships identified (hostnames, organizations, certificates, or related IPs).

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## SUBNET NEIGHBORHOOD ANALYSIS

Subnet: 38.3.133.77/24

• Neighbor Count: 0
• Abuse Density: 0.00
• Risk Distribution: No high/medium/low risk siblings detected
• Threat Siblings: 0
• Active Siblings: 0

Conclusion: The /24 subnet exhibits benign activity with no correlated malicious neighbors.

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## TECHNICAL INDICATORS

Control Plane:

• BGP Prefix: 38.3.133.0/24
• Route Changes (30d): 0
• Route Stability: False
• RPKI State: Not reported
• DNSSEC Valid: True

Connectivity:

• Traceroute Hop Count: 16
• First Hop RTT: 0.3ms
• Last Hop RTT: 146.8ms
• Timed Out Hops: 4
• Transit Networks: Comcast

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## RECOMMENDED ACTIONS

Current Risk Level: LOW

Action Priority: MONITOR

Recommended Measures:

1. No immediate firewall rules required

2. Continue routine geolocation validation due to Brazil/US discrepancy

3. Monitor for service activation (current state: no open ports/services)

4. Maintain blacklist monitoring (currently clean)

Firewall Rules: Not applicable (no risk indicators warranting blocking)

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## ANALYST NOTES

This IP address represents a legitimate Cogent Communications infrastructure asset with no observed threat activity. The geolocation inconsistency between profile and historical data should be noted but does not currently indicate malicious behavior. The subnet shows clean activity with no threat siblings. Standard monitoring protocols are sufficient; no blocking or alerting actions are recommended at this time.

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End of Briefing

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