54.39.6.6📋 Copy

## IP Intelligence Briefing: 54.39.6.6

Date: 2026-06-18

Classification: Moderate Risk (Score: 40/100)

Status: Active Monitoring Recommended

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EXECUTIVE SUMMARY

IP 54.39.6.6 is a cloud infrastructure endpoint operating from OVH's Canadian hosting network. While the endpoint itself shows no active threat indicators, the /24 subnet exhibits elevated abuse density (0.6602) with 169 of 174 active siblings flagged as threats. The IP resolves to Ahrefs infrastructure (proxy-ca001-san6.ahrefs.net) but presents no current malicious activity.

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NETWORK ATTRIBUTION

• Organization: Dmytro, Ahrefs Pte Ltd
• ASN: 16276 (OVH)
• CIDR: 54.39.6.0/24
• Geolocation: Canada, Quebec (Beauharnois)
• Infrastructure Type: CloudCompute / Hosting Provider
• Network Role: Firewalled / No Services Detected

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THREAT ASSESSMENT

Current Risk Profile:

• Risk Score: 40 (Moderate)
• Abuse Confidence: Not scored
• Known Campaigns: None
• Blacklist Status: Clean (0 lists)
• Tor/Proxy: Not identified
• Known Attacker: No

Risk Context:

The /24 subnet shows inherited risk of 26 with high_abuse classification. Of 174 active sibling IPs in the same /24, 169 are classified as threats. This suggests the subnet hosts compromised or misconfigured endpoints, though this specific IP shows no active threat signals.

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OBSERVATION HISTORY

• Total Observations: 21 signals
• Recent Activity: 2026-06-18 (subnet abuse density, operator score)
• DNS Activity: Resolves to ahrefs.net domain (CAA records verified, DNSSEC valid)
• Threat Persistence: 0 days (not persistently malicious)
• Ownership Changes: 0 (stable)

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RELATED ENTITIES

• Primary Network: OVH-CUST-281059680 (44 relationship links)
• Associated Domain: ahrefs.net
• Subnet Classification: high_abuse (0.6602 density)

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RECOMMENDED ACTIONS

Firewall Recommendations:

• iptables: `iptables -A INPUT -s 54.39.6.6 -j DROP`
• nftables: `nft add rule inet filter input ip saddr 54.39.6.6 drop`
• Cloudflare WAF: Block with expression `ip.src eq 54.39.6.6`
• AWS WAF: Block with address `54.39.6.6/32`

SOC Guidance:

1. Monitor for lateral movement from related subnet addresses (54.39.6.0-255)

2. Review recent traffic patterns from this /24 for anomalies

3. Consider broader subnet blocking (54.39.6.0/24) if traffic volume warrants

4. No immediate blocking required; maintain baseline monitoring

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INTELLIGENCE NOTES

The IP demonstrates legitimate cloud hosting characteristics with no evidence of active exploitation. However, the elevated sibling threat count within the subnet warrants ongoing monitoring. The association with Ahrefs infrastructure may indicate this is a legitimate proxy endpoint, though the hosting context suggests potential for abuse by third-party actors.

Confidence Level: Medium

Data Sources: IPDebrief Intelligence Platform

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