157.55.39.193
157.55.39.193 is an IPv4 address operated by Microsoft Corporation (AS8075), geolocated to Quincy, United States. Its reverse DNS name is msnbot-157-55-39-193.search.msn.com. As of October 9, 2026, IPDebrief rates it Low Risk (25/100); no anonymizing service was detected.
INTELLIGENCE BRIEFING: 157.55.39.193/32
Date: Current Analysis Cycle
Classification: Low Risk / Legitimate Infrastructure
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EXECUTIVE SUMMARY
IP 157.55.39.193 is identified as Microsoft Bingbot search crawler infrastructure operating within Microsoft Azure Cloud. Risk score of 25 indicates low threat profile. No active malicious indicators detected. IP belongs to MSFT-GFS network block (157.54.0.0/15), registered to Microsoft Corporation (ASN 8075).
TECHNICAL PROFILE
| Attribute | Value |
|---|---|
| **Risk Score** | 25 (Low Risk) |
| **Organization** | Microsoft Corporation |
| **ASN** | AS8075 |
| **Geolocation** | Quincy, WA, US |
| **Infrastructure** | Microsoft Azure CloudCompute |
| **DNS** | msnbot-157-55-39-193.search.msn.com |
| **Network Classification** | Cloud Provider / Search Bot |
| **Open Ports** | None detected |
THREAT INDICATORS
- Abuse Confidence Score: Not applicable (legitimate infrastructure)
- Known Attacker: False
- Spam Source: False
- Tor Exit: False
- Blacklist Count: 1 of 8 DNSBL lists
- Threat Persistence: 0 days observed
- Campaign Correlation: None identified
NETWORK CONTEXT
Subnet Analysis (157.55.39.0/24):
- Total Siblings: 39
- Abuse Density: 0%
- Classification: Mostly Clean
- Risk Distribution: 0 High, 1 Medium, 37 Low
- Inherited Risk: 4/100
Related Entities:
- DNS: msnbot-157-55-39-193.search.msn.com
- Network: MSFT-GFS (157.55.0.0/16)
OBSERVATION HISTORY
25 historical observations collected. Recent signals indicate:
- Bingbot activity with 90% confidence
- Microsoft Corporation attribution with 95% confidence
- Cloud infrastructure classification consistent
- One signal flagged with "has_threats: true" requiring monitoring
RECOMMENDED ACTIONS
No immediate blocking recommended. IP represents legitimate Microsoft search crawler infrastructure. Monitor for behavioral changes or anomalous traffic patterns.
Action Priority: Monitor
Blocking Status: Not Recommended
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ANALYST NOTES: IP shows consistent Microsoft Azure infrastructure characteristics with Bingbot search crawler behavior. Low-risk classification supported by organization attribution, geolocation consistency, and subnet cleanliness. No evidence of malicious activity or compromised infrastructure.
End of Briefing
This summary was generated by AI and may contain inaccuracies. Verify critical details independently.
🏢 Ownership & Registration
| Organization | Microsoft Corporation |
| ASN | AS8075 |
| Network Name | MSFT-GFS |
| CIDR Block | 157.54.0.0/15 |
| RIR | ARIN |
| Country | United States |
| Abuse Contact | Available via RDAP |
🌐 DNS Intelligence
| PTR | msnbot-157-55-39-193.search.msn.com |
| Forward Confirmed | Yes — FCrDNS verified |
| Forward Hostnames | msnbot-157-55-39-193.search.msn.com |
🔐 DNS Hygiene
| Hygiene Score | 80% (Excellent) |
| SPF | 2/2 domains |
| DMARC | 2/2 domains |
| FCrDNS | Verified |
| DNSSEC | Not signed |
| CAA | Present |
| Domains Checked | 2 domains |
☁️ Network Classification
| Infrastructure | Unknown |
| Service Purpose | Firewalled / No Services |
| Network Tier | Unknown — Insufficient routing data to classify |
🔌 Services & Open Ports
| Port | Service | Protocol | Banner |
|---|---|---|---|
| No open ports detected | |||
| Closed Ports | 22, 25, 80, 443, 3389, 8080, 8443 (0 open / 7 scanned) | ||
| Server | — |
| HTTP Title | — |
🔐 TLS Certificate
| SANs | None |
| Valid From | — |
| Valid Until | — |
🛡️ Public Network Snapshot
| Origin ASN | AS8075 |
| Network Prefix | 157.55.0.0/16 |
| Route mapping | Found |
🎯 Confidence Breakdown
Per-dimension confidence scores based on source diversity and data freshness
| Dimension | Score | Sources | Observations |
|---|---|---|---|
| threat | 30% | 2 | 4 |
| routing | 24% | 2 | 3 |
| services | 12% | 2 | 2 |
| ownership | 17% | 2 | 3 |
| reputation | 13% | 1 | 2 |
| geolocation | 24% | 2 | 3 |
| Overall | 20% | 11 | 17 |
| Data Coherence | Consistent (100%) |
| Attribution | Moderate (70%) |
| OwnershipFCrDNSGeo ConsensusGeo PlausibleIRR MatchRPKI Valid |
📅 Observation Timeline 🔄 Live
| First Seen | 2026-07-02 04:21:05 UTC |
| Last Seen | 2026-10-09 03:56:55 UTC |
| Profile Built | 2026-10-09 03:58:40 UTC |
| Data Freshness | Live |
| Signal Types | 26 |
| Total Observations | 29 |
Full dossier details are available via our API.
❓ Frequently Asked Questions About 157.55.39.193
Who owns the IP address 157.55.39.193?
157.55.39.193 is registered to Microsoft Corporation. The address falls within the 157.54.0.0/15 network block. Registration is held at ARIN.
Where is 157.55.39.193 located?
Geolocation data places 157.55.39.193 in Quincy, WA, United States. The local time zone is America/Los_Angeles. IP geolocation is approximate and indicates the network's registered or routed location rather than a precise physical address.
Is 157.55.39.193 malicious or safe?
157.55.39.193 currently carries a low risk assessment, meaning no significant threat indicators have been observed. This assessment is generated from continuously collected signals and can change over time.
What is the hostname for 157.55.39.193?
The reverse DNS (PTR) record for 157.55.39.193 is msnbot-157-55-39-193.search.msn.com. This hostname is forward-confirmed, meaning it resolves back to the same address.