47.128.121.99📋 Copy

# IP INTELLIGENCE BRIEFING: 47.128.121.99/32

Classification: Moderate Risk | Timestamp: Current Analysis | Status: Active

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## EXECUTIVE SUMMARY

IP address 47.128.121.99 is an AWS-hosted EC2 instance located in Singapore (ap-southeast-1). The address exhibits moderate risk (score: 40) with a valid AWS hostname and cloud infrastructure classification. While no active threat indicators are present, the subnet demonstrates elevated abuse density (0.6), warranting continued monitoring.

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## TECHNICAL PROFILE

Ownership & Network:

• Organization: Amazon Data Services Singapore
• ASN: 16509 (Amazon.com, Inc.)
• Infrastructure: CloudCompute (AWS EC2)
• CIDR Block: 47.128.0.0/14

Geolocation:

• Country: Singapore (SG)
• Coordinates: 1.35°N, 103.82°E
• Accuracy: 150 km radius
• Geolocation Confidence: Validated (multi-source consensus)

DNS Resolution:

• PTR Hostname: ec2-47-128-121-99.ap-southeast-1.compute.amazonaws.com
• Forward Resolution: Confirmed (1 hostname)
• DNSSEC: Valid
• Email Auth: SPF and DMARC records present

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## THREAT ASSESSMENT

Risk Indicators:

• Risk Score: 40/100 (Moderate)
• Abuse Confidence Score: Not applicable
• Known Campaigns: None identified
• Blacklist Count: 0
• DNSBL Listings: 1 of 8 total lists

Service Exposure:

• Open Ports: None detected
• HTTPS/TLS: No certificates observed
• HTTP Services: None active
• Classification: Firewalled / No Services

Threat Indicators:

• Not a Tor exit node
• Not a known attacker IP
• Not a spam source
• No active threat feed matches

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## SUBNET CONTEXT (47.128.121.0/24)

Neighborhood Analysis:

• Total Siblings: 80 IPs
• Active Siblings: 54
• Threat Siblings: 48
• Abuse Density: 0.6 (High Abuse Classification)
• Inherited Risk: 24

Risk Distribution in Subnet:

• High Risk: 0%
• Medium Risk: 79%
• Low Risk: 9%

The subnet demonstrates elevated abuse activity relative to typical cloud infrastructure, with nearly half of active addresses flagged as threats.

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## OBSERVATION HISTORY

Activity Timeline: 22 observations recorded

• Most Recent: 2026-06-20 09:53 UTC
• Signal Types: Subnet abuse density, geolocation, operator scoring, routing validation
• Trend: Persistent cloud infrastructure with consistent Singapore geolocation

Stability Indicators:

• Ownership changes: 0
• Threat persistence days: 0
• Is persistently malicious: No

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## RELATIONSHIP GRAPH

Identified Associations (42 total):

• DNS Associations: ec2-47-128-121-99.ap-southeast-1.compute.amazonaws.com (multiple entries)
• Network Association: AMAZON-SIN
• Control Plane: Origin ASN 16509, BGP prefix 47.128.0.0/14
• Route Stability: False (indicating potential prefix churn)

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## RECOMMENDED ACTIONS

Firewall/Security:

1. Allow with Monitoring: Traffic may be legitimate AWS infrastructure; no immediate block recommended

2. DNSBL Review: Investigate source of single DNSBL listing for context

3. Subnet Context: Consider broader monitoring of 47.128.121.0/24 subnet due to elevated abuse density

Detection Rules:

• Monitor for outbound connections from this subnet to unusual destinations
• Watch for any changes in service exposure on this IP
• Track DNSBL listing sources and changes

Priority: LOW-MEDIUM

Rationale: Legitimate AWS hosting with moderate risk profile. No active threats identified, but subnet context warrants awareness.

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Data Sources: IPDebrief Intelligence Platform | Analysis: Current Profile Snapshot

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