157.55.39.56📋 Copy

# IP Intelligence Briefing: 157.55.39.56/32

Classification: Legitimate Cloud Infrastructure

Date: Current

Risk Level: Low (Score: 25/100)

## Executive Summary

IP 157.55.39.56 is a Microsoft Azure cloud infrastructure endpoint associated with MSN Search Bot operations. The IP exhibits standard cloud provider characteristics with no malicious indicators. All observed signals align with legitimate Microsoft Corporation infrastructure.

## Ownership & Network Classification

## Technical Profile

DNS Resolution:

• PTR Hostname: msnbot-157-55-39-56.search.msn.com
• Forward Hostname: msnbot-157-55-39-56.search.msn.com
• Primary Domain: msn.com
• DNSSEC Valid: Yes
• CAA Records: Present

Services:

• Open Ports: None detected
• TLS Certificate: None
• HTTP Title: Not available (firewalled)
• Connection Status: No services exposed

Threat Indicators:

• Blacklist Count: 0
• Abuse Confidence Score: N/A
• Is Tor Exit: No
• Is Known Attacker: No
• Is Spam Source: No
• Known Campaigns: None

## Neighborhood Analysis

Subnet: 157.55.39.0/24

Abuse Density: 0%

Total Siblings: 22

Active Siblings: 6

Threat Siblings: 7

Risk Distribution:

• High Risk: 0
• Medium Risk: 2
• Low Risk: 26

Most neighboring IPs in the /24 subnet maintain consistent risk scores (25-50) with authority scores of 60, indicating standardized cloud infrastructure characteristics across the Microsoft Azure block.

## Observation History

Total Observations: 23

Most Recent: 2026-06-14T19:32:42Z

Signal Trends:

• Network classification consistently identifies Microsoft Azure cloud infrastructure
• Geolocation signals confirm US/Washington location with 0.56 confidence
• DNS signals confirm MSN search bot association
• No malicious signal transitions observed
• Risk profile has remained stable over observation period

## Intelligence Assessment

The IP address represents legitimate Microsoft Azure infrastructure used for search indexing operations. Key indicators supporting benign classification include:

1. Microsoft Ownership: Directly associated with Microsoft Corporation (ASN 8075)

2. Cloud Infrastructure: Standard Azure compute environment characteristics

3. Search Bot Activity: DNS records confirm MSN search crawler operations

4. No Malicious Signals: Zero blacklist entries, no threat feed matches

5. Stable Profile: Consistent network behavior with no risk escalation

## Recommended Actions

Firewall Policy: Allow with monitoring or default allow (legitimate cloud provider)

Threat Hunt: No action required

IOC Generation: Not recommended (benign infrastructure)

False Positive Mitigation: Maintain in allow list for Microsoft Azure traffic

SOC Analyst Notes: This IP should not be treated as malicious. The low risk score (25), Microsoft Azure classification, and MSN search bot DNS association confirm legitimate cloud infrastructure operations. No blocking or mitigation actions recommended.

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