# 157.55.39.16 — IP Intelligence Summary

157.55.39.16 is an IPv4 address operated by Microsoft Corporation (AS8075), geolocated to Quincy, United States. Its reverse DNS name is msnbot-157-55-39-16.search.msn.com. As of October 10, 2026, IPDebrief rates it Low Risk (25/100); no anonymizing service was detected.

- Canonical page: https://ipdebrief.com/157.55.39.16
- Last updated: 2026-10-10

## Ownership

- Organization: Microsoft Corporation
- Network name: MSFT-GFS
- Allocated block: 157.54.0.0/15
- ASN: AS8075 (https://ipdebrief.com/asn/8075)
- Regional registry: ARIN
- Cloud / hosting provider: Bingbot

## Location

- City: Quincy
- Region: WA
- Country: United States
- Time zone: America/Los_Angeles

## Network classification

- Infrastructure type: —
- Datacenter / hosting: no
- Residential: no
- Mobile: no
- Anycast: no
- Tor exit node: no
- VPN: no
- Proxy: no

## Risk assessment

- Assessment: Low Risk (25/100)
- Blocklist listings: 0
- Suspicious activity indicators: no
- Spam source: no

## Reverse DNS

- msnbot-157-55-39-16.search.msn.com
- Forward-confirmed: yes

## Analyst narrative

\# IP Intelligence Briefing: 157.55.39.16/32

\## Executive Summary

IP 157.55.39.16 is a Microsoft Corporation cloud infrastructure address operating as a Bing/Microsoft search crawler (Bingbot). Risk assessment indicates Low Risk status with no active threat indicators. The IP is part of legitimate Microsoft Azure cloud computing infrastructure used for search indexing activities.

\## Infrastructure Profile

| Attribute | Value |

|-----------|-------|

| **Risk Score** | 0/100 (Low Risk) |

| **Organization** | Microsoft Corporation (AS8075) |

| **Network** | 157.54.0.0/15 (MSFT-GFS) |

| **Geolocation** | Quincy, WA, US |

| **Infrastructure Type** | CloudCompute (Azure) |

| **DNS Hostname** | msnbot-157-55-39-16.search.msn.com |

\## Threat Assessment

\- **Blacklist Status:** Not listed on any threat feeds

\- **Tor/Proxy Status:** Not a Tor exit node, not a proxy, not a CDN

\- **Known Campaigns:** None identified

\- **Active Threat Indicators:** 0 detected

\- **Campaign Likelihood:** None

\## Neighborhood Analysis

The /24 subnet (157.55.39.0/24) shows a **mostly_clean** classification:

\- **Total Siblings:** 39 (38 active)

\- **Abuse Density:** 0.1026 (low)

\- **Threat Distribution:** 0 high-risk, 1 medium-risk, 37 low-risk

\- **Notable Siblings:** Multiple IPs with risk score 25 (likely Microsoft infrastructure with elevated authority scores); one sibling at 157.55.39.223 with risk score 50

\## Observed Behavior

**Recent Observations (25 total):**

\- DNS resolution consistently to msn.com search crawler hostname

\- Network classification stable as cloud infrastructure

\- Traceroute paths show 24 hops with stable routing

\- No service banners or open ports detected

\- No HTTP/HTTPS services exposed (Firewalled/No Services)

\## Security Assessment

This IP represents legitimate Microsoft search infrastructure. The address is not associated with malicious activity, command and control, or data exfiltration patterns. The absence of open ports and services suggests this crawler may operate in a restricted network segment.

\## Recommended Actions

No specific mitigation actions required. Standard monitoring protocols apply. The IP may be observed in inbound traffic to Microsoft services or outbound traffic from Microsoft cloud infrastructure.

**Classification:** LOW RISK - Legitimate Cloud Infrastructure

**Priority:** Routine Monitoring

## Nearby addresses

- 157.55.39.6 (https://ipdebrief.com/157.55.39.6)
- 157.55.39.7 (https://ipdebrief.com/157.55.39.7)
- 157.55.39.8 (https://ipdebrief.com/157.55.39.8)
- 157.55.39.9 (https://ipdebrief.com/157.55.39.9)
- 157.55.39.10 (https://ipdebrief.com/157.55.39.10)
- 157.55.39.11 (https://ipdebrief.com/157.55.39.11)
- 157.55.39.12 (https://ipdebrief.com/157.55.39.12)
- 157.55.39.13 (https://ipdebrief.com/157.55.39.13)
- 157.55.39.14 (https://ipdebrief.com/157.55.39.14)
- 157.55.39.15 (https://ipdebrief.com/157.55.39.15)
- 157.55.39.48 (https://ipdebrief.com/157.55.39.48)
- 157.55.39.49 (https://ipdebrief.com/157.55.39.49)

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Source: IPDebrief, "157.55.39.16 IP intelligence", https://ipdebrief.com/157.55.39.16, updated 2026-10-10. Assessments are probabilistic.