115.66.150.33📋 Copy

# Intelligence Briefing: 115.66.150.33/32

Classification: Moderate Risk

Date: Current

Analyst: IPDebrief SOC Intelligence

## Executive Summary

The IP address 115.66.150.33 belongs to Singtel (ASN 9506) in Singapore and presents moderate risk (score: 60). The address is associated with mobile carrier infrastructure (Singtel LTE/5G) and shows no active services. The subnet demonstrates clean classification with zero abuse density across 115.66.150.0/24.

## Ownership & Infrastructure

The IP resolved to mobile carrier infrastructure with Singtel as the carrier (MCC 525, MNC 01). DNS PTR record bb115-66-150-33.singnet.com.sg confirms infrastructure association. No open ports detected; services remain firewalled with no active HTTP/HTTPS endpoints.

## Threat Assessment

The address exhibited one threat observation with no persistent malicious activity detected. Route changes occurred within the 30-day window, indicating some routing instability.

## Network Neighborhood Analysis

The 115.66.150.0/24 subnet showed zero abuse density across all monitored sibling addresses. No active or threat siblings detected. The neighborhood classification remains "clean" with no inherited risk from adjacent addresses.

## Historical Observations

Nineteen observations recorded, with the most recent activity dated 2026-07-29. Ownership remained stable with zero changes. Threat persistence days registered at zero. The address is not classified as persistently malicious.

## Recommended Actions

Firewall/Routing:

• Monitor for connection attempts (mobile carrier IP)
• Allow traffic from Singtel mobile network ranges if legitimate use required
• No immediate blocking recommended given clean subnet classification

Investigation Priorities:

• Review DNSBL listings to determine blocking rationale
• Verify if the 2 DNSBL listings relate to specific campaigns or false positives
• Monitor for any emergence of services on this mobile carrier IP

## Conclusion

IP 115.66.150.33 represents mobile carrier infrastructure from Singtel with moderate risk scoring primarily from DNSBL associations. The subnet demonstrates clean characteristics with no abuse density. SOC teams should monitor but need not block unless specific threat indicators emerge. The mobile carrier designation suggests legitimate traffic patterns; blocking may impact legitimate users.

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