54.39.203.246📋 Copy

# IP Intelligence Briefing: 54.39.203.246

## Executive Summary

IP 54.39.203.246 presents a moderate risk profile (risk score: 40) operating within a high-abuse subnet environment. The address belongs to OVH infrastructure (ASN 16276) and resolves to a proxy hostname associated with ahrefs.net. While no active threat indicators were detected, the subnet context suggests elevated abuse potential requiring monitoring.

## Infrastructure Profile

Ownership and Network:

• ASN: 16276 (OVH)
• Organization: Dmytro, Ahrefs Pte Ltd
• Network Block: 54.39.203.0/24
• Infrastructure Type: CloudCompute with hosting services
• Classification: Cloud provider environment, not CDN, VPN, or proxy

Geolocation:

• Reported Location: Beauharnois, Quebec, Canada
• RTT Validation: Significant discrepancy detected (30ms measured vs 112.6ms minimum possible for 5,629km distance), indicating geolocation data may be inaccurate
• Geo Plausibility: False

## Network Services and DNS

DNS Resolution:

• PTR Hostname: proxy-ca008-san246.ahrefs.net
• Domain: ahrefs.net
• Forward Resolution: Confirmed to single hostname
• No email authentication records (SPF/DMARC absent)

Services:

• No open ports detected
• No TLS certificates or HTTP services observed
• No server banners or content fingerprints identified

## Threat Indicators

Assessment:

• Abuse Confidence Score: Not populated
• Known Attacker Status: False
• Tor Exit Node: False
• Spam Source: False
• Blacklist Count: 0
• No active threat feeds correlations

Campaign Analysis:

• Campaign Likelihood: None
• Zero certificate matches or correlated IPs

## Neighborhood Analysis

Subnet Risk Profile (54.39.203.0/24):

• Abuse Density: 0.6523 (classified as high_abuse)
• Total Siblings: 256 addresses
• Active Siblings: 218
• Threat Siblings: 167
• Risk Distribution: 59 medium, 41 low, 0 high risk neighbors

The subnet demonstrates significant abuse concentration, with 77% of active addresses showing threat indicators.

## Observation History

Temporal Signals:

• Total Observations: 29
• Most Recent Signal: 2026-06-28 (operator score: 0.35)
• Subnet abuse classification observed: 2026-06-20 (high_abuse classification)
• DNS resolution to ahrefs.net confirmed: 2026-06-20
• No persistent malicious activity detected

## Recommended Actions

Based on the moderate risk profile and high-abuse subnet context, the following firewall rules are recommended:

iptables: `iptables -A INPUT -s 54.39.203.246 -j DROP`

nftables: `nft add rule inet filter input ip saddr 54.39.203.246 drop`

nginx: `deny 54.39.203.246;`

Cloudflare WAF: Block IP with expression `ip.src eq 54.39.203.246`

AWS WAF: Add `54.39.203.246/32` to block list with description "IPDebrief risk 40"

## Intelligence Narrative

The IP address 54.39.203.246 operates within OVH's cloud infrastructure in a subnet characterized by elevated abuse density. Despite the moderate individual risk score of 40, the subnet context presents notable concern: 167 of 218 active neighbors in the /24 block are flagged as threats, yielding an abuse density of 0.6523. The address resolves to a proxy hostname (proxy-ca008-san246.ahrefs.net) under the ahrefs.net domain, which may indicate legitimate SaaS infrastructure or potentially misconfigured hosting.

No active threat indicators were observed in current scans. However, the combination of high-abuse subnet placement, missing email authentication records, and geolocation validation failures warrants continued monitoring. The IP is not classified as a Tor exit node, known attacker, or spam source, but the neighborhood risk profile suggests defensive blocking is warranted as a precautionary measure.

Recommendation: Implement blocking rules at perimeter security controls while monitoring for any changes in threat indicators or service activity.

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