54.39.210.153📋 Copy

# IP Intelligence Briefing: 54.39.210.153/32

Classification: Moderate Risk

Date: 2026-06-25

Analyst: IPDebrief Intelligence Team

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## Executive Summary

IP 54.39.210.153 is a cloud computing endpoint hosted on OVH infrastructure in Canada with a moderate risk score (50). While the IP itself shows no direct threat indicators, it resides within a high-abuse-density subnet (54.39.210.0/24) classified as having elevated abuse activity. The endpoint resolves to ahrefs.net but exhibits geolocation inconsistencies that warrant monitoring.

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## Ownership & Infrastructure

• Organization: Dmytro, Ahrefs Pte Ltd
• ASN: AS16276 (OVH SAS)
• Network Block: 54.39.210.0/24
• Infrastructure Type: Cloud Compute / Hosting
• Country: Canada (QC - Beauharnois)
• Status: Firewall / No Services Detected

The IP is part of OVH's cloud hosting infrastructure, specifically under customer account OVH-CUST-281059686. The infrastructure designation as "CloudCompute" with "isHosting: true" confirms this is a legitimate hosting environment.

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## DNS Resolution

• PTR Hostname: proxy-ca007-san153.ahrefs.net
• Resolved Domain: ahrefs.net
• Forward Resolution: Confirmed (1 hostname)
• Email Authentication: SPF/DMARC not configured
• CAA Records: Present (DNSSEC Valid)

DNS records confirm legitimate association with ahrefs.net, a known SEO analytics service. However, forward resolution failed to confirm the PTR record, suggesting potential misconfiguration or reverse DNS issues.

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## Threat Assessment

Current Risk Score: 50 (Moderate Risk)

Threat Indicators: None detected

Blacklist Status: 0 blacklists

Known Campaigns: None

Direct threat indicators are absent. The IP is not identified as a Tor exit node, known attacker, or spam source. However, the subnet-level context presents elevated concerns.

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## Subnet Analysis (54.39.210.0/24)

Abuse Density: 0.5547 (High Abuse)

Classification: High Abuse

Total Siblings: 256

Active Siblings: 208

Threat Siblings: 142

The /24 subnet exhibits significant abuse activity with 55.47% abuse density. Of 208 active IPs, 142 show threat indicators, indicating this is a heavily utilized hosting block with mixed legitimate and potentially compromised endpoints.

Neighbor Risk Distribution (Sample):

• 54.39.210.0-5: Risk Score 40, Authority Score 50 (all neighbors show similar moderate-risk profiles)

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## Control Plane & Routing

• Operator Score: 0.2174 (Minimal)
• DNSBL Listed: 2 of 8 total lists
• Route Stability: Unstable
• RPKI State: Not Available
• IRR Consistency: Not Available

Route instability and DNSBL listings on 2 of 8 lists suggest some reputation issues at the network level, though the operator score remains minimal.

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## Geolocation Discrepancy

Observed: CA (Canada) - Beauharnois, QC

RTT-Based Distance: 5628.6km

Minimum Possible RTT: 112.6ms

Actual RTT: 26.0ms

Alert: Significant geolocation violation detected. The observed RTT of 26.0ms contradicts the reported distance of 5628.6km (minimum expected RTT 112.6ms). This discrepancy indicates potential geolocation spoofing or data source inconsistency.

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## Historical Observations (23 Signals)

Recent signal timeline (2026-06-25):

1. 16:53: Minimal operator score (0.087)

2. 16:55: Geolocation from Alienvault OTX - Beauharnois, QC, CA with threat indicators present

3. 16:56: ASN 16276 (OVH SAS) - Hosting infrastructure confirmed

4. 16:58: Subnet abuse density 0.5547, high_abuse classification

5. 17:14: Domain resolution to ahrefs.net with CAA records

Threat Persistence: 0 days (not persistently malicious)

Observation Count: 1 threat-related observation

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## Recommended Security Actions

Immediate Actions:

1. Monitor Subnet Activity: Given 142 threat siblings in the /24, implement enhanced monitoring for traffic patterns across 54.39.210.0/24

2. Verify Geolocation: Investigate the RTT/geolocation discrepancy to determine if traffic is truly originating from Canada or being proxied

3. DNS Verification: Validate forward/reverse DNS consistency for ahrefs.net endpoints

Firewall Rules (Recommended):

• Block if: Traffic from this subnet shows port scanning or connection attempts to sensitive services
• Monitor if: Traffic to/from this IP shows unusual connection patterns given the high-abuse subnet context
• Allow if: Business relationship with ahrefs.net is confirmed and traffic appears legitimate

Long-term Considerations:

• The subnet's high abuse density (0.5547) suggests this hosting block should be treated with elevated scrutiny
• The geolocation discrepancy warrants investigation to rule out proxy or anonymization services
• Monitor for any correlation with known ahrefs.net campaigns or threats

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## Conclusion

IP 54.39.210.153 presents a moderate risk profile with legitimate cloud infrastructure hosting. While no direct threat indicators exist for this specific endpoint, the high-abuse subnet context and geolocation anomalies require ongoing monitoring. The association with ahrefs.net suggests legitimate use, but the subnet-level abuse density and technical discrepancies warrant continued observation.

Priority: Medium

Action Required: Monitoring and verification of geolocation data

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