51.195.215.48📋 Copy

# Intelligence Briefing: 51.195.215.48/32

Classification: MODERATE RISK

Date: June 28, 2026

Analyst: IPDebrief SOC Intelligence

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## Executive Summary

IP 51.195.215.48 is a cloud-based infrastructure endpoint assigned to OVH SAS (ASN 16276), operating under the Ahrefs Pte Ltd organization. The IP maintains a moderate risk score of 40 and is geolocated to London, England. The address resolves to ahosted domain (proxy-uk009-san48.ahrefs.net) with no active open services detected, indicating a firewalled configuration.

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## Infrastructure Profile

DNS Resolution: proxy-uk009-san48.ahrefs.net (ahrefs.net)

Service Status: Firewalled / No Services Detected

TLS Certificate: Not detected

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## Threat Assessment

Current Risk Indicators:

• DNSBL Listings: 1 out of 8 total lists (dnsblListedCount)
• Operator Score: 0.2174 (Minimal)
• Abuse Confidence: Not elevated
• Known Attacker: No
• Tor Exit Node: No
• Spam Source: No

Control Plane Data:

• BGP Prefix: 51.195.0.0/16
• Route Stability: False (route changes observed)
• DNSSEC Valid: Yes
• RPKI State: Available

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## Neighborhood Analysis

Subnet: 51.195.215.0/24

Abuse Density: 0.7344 (High Abuse)

Total Siblings: 256

Active Siblings: 199

Threat Siblings: 188

Risk Distribution in /24:

• High Risk: 0
• Medium Risk: 52
• Low Risk: 48

*Note: The subnet exhibits elevated abuse activity with approximately 73% of addresses showing threat indicators. This IP inherits an inherited risk score of 29 from neighborhood context.*

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## Historical Observations

Total Observations: 21 signals tracked

Recent Signal Timeline:

• June 28, 2026: Confirmed cloud infrastructure (OVH), not CDN/Tor/VPN
• June 20, 2026: Operator score registered at 0.2174 (Minimal); 1 DNSBL listing detected
• June 20, 2026: Early observations confirmed hosting classification

Behavioral Trends: No persistent malicious behavior detected. Ownership remains stable with 0 ownership changes. Threat observation count: 0.

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## Relationship Graph

Total Relationships: 36 detected

Primary Relationships: Same Network (OVH_282347345) — 36 occurrences

The IP shares network infrastructure relationships with multiple OVH-managed endpoints, indicating shared hosting or data center allocation.

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## Recommended Actions

Defense-in-Depth Recommendations:

1. Monitor Traffic: Given moderate risk score and neighborhood abuse density, implement rate limiting for this IP

2. DNSBL Verification: Investigate the single DNSBL listing to determine source and rationale

3. Egress Filtering: Verify legitimate outbound traffic patterns for this Ahrefs infrastructure

4. Subnet Context: Evaluate other /24 addresses (51.195.215.0-255) showing elevated abuse density

Firewall Rule (iptables):

```bash

iptables -A INPUT -s 51.195.215.48/32 -m limit --limit 5/min -j ACCEPT

iptables -A INPUT -s 51.195.215.0/24 -m limit --limit 10/min -j ACCEPT

```

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## Conclusion

IP 51.195.215.48 represents a moderate-risk cloud infrastructure endpoint associated with Ahrefs operations. While the IP itself shows no active malicious indicators, its neighborhood context (73% abuse density) warrants continued monitoring. The firewalled configuration and lack of open services suggest legitimate hosting use, but traffic should be validated against organizational baseline behavior.

Status: Monitor

Priority: Medium

Next Review: 30 days

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*Report generated by IPDebrief Intelligence Platform*

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