54.39.203.27📋 Copy

# IP Intelligence Briefing: 54.39.203.27/32

Classification: Moderate Risk / Cloud Infrastructure

Report Date: 2026-06-20

Analyst: IPDebrief Threat Intelligence Team

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## Executive Summary

IP address 54.39.203.27 is classified as Moderate Risk with a risk score of 40/100. The address is owned and operated by OVH (ASN 16276) under the customer organization "Dmytro, Ahrefs Pte Ltd." The IP resolves to hostname proxy-ca008-san27.ahrefs.net, indicating association with Ahrefs infrastructure. While no active threat indicators were detected, the subnet exhibits elevated abuse density (0.707), suggesting this IP shares a hosting environment with potentially malicious activity.

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## Technical Profile

Ownership and Network Classification

• ASN: 16276 (OVH)
• Organization: Dmytro, Ahrefs Pte Ltd
• CIDR Block: 54.39.203.0/24
• Network Role: Cloud Compute / Hosting Infrastructure
• Service Status: Firewalled / No Services Open
• Infrastructure Type: OVH Cloud Provider

Geolocation Data

• Country: Canada (CA)
• Region: Quebec (QC)
• City: Beauharnois
• Geographic Validation: FLAGGED — RTT measurement violation detected (29ms observed vs 112.6ms minimum possible for 5629km distance). This suggests geolocation data may be inaccurate or the IP is part of an anycast/mirror network.

DNS Analysis

• PTR Hostname: proxy-ca008-san27.ahrefs.net
• Domain: ahrefs.net
• Forward Resolution: Confirmed (1 hostname)
• Email Authentication: No SPF or DMARC records detected
• DNSBL Status: Listed on 1 of 8 threat lists (dnsblListedCount: 1)

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## Threat Indicators

Current Threat Assessment

• Abuse Confidence Score: Not available
• Known Attacker: No
• Spam Source: No
• Tor Exit Node: No
• Blacklist Count: 0
• Active Threat Campaigns: None detected
• Cert Matches: 0
• Correlated IPs: 0

Risk Breakdown

• Provider Score: 0
• Authority Score: 0
• Stability Score: 0
• Operator Score: 0.2174 (Minimal)
• Subnet Abuse Density: 0.707 (High)
• Inherited Risk: 28/100

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## Neighborhood Analysis

The IP resides in subnet 54.39.203.0/24 with the following characteristics:

• Total Siblings: 256
• Active Siblings: 225
• Threat Siblings: 181
• Classification: High Abuse
• Abuse Density: 0.707

Risk distribution across sampled neighbors:

• High Risk: 0
• Medium Risk: 36
• Low Risk: 64

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## Historical Observations

Recent signal history (2026-06-20):

• Subnet abuse density consistently reported at 0.707 (high abuse)
• Ownership remains stable (0 changes)
• Not flagged as persistently malicious
• Threat observation count: 1
• Geographic validation consistently shows implausible RTT metrics

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## Recommended Security Actions

Based on the moderate risk profile and neighborhood abuse density:

1. Monitoring: Flag for enhanced monitoring due to high-abuse subnet context

2. Firewall Rules: No immediate blocking recommended; maintain logging for outbound connections

3. DNS Policy: Consider blocking or rate-limiting DNS queries to ahrefs.net if not explicitly required

4. Email Reputation: No email authentication records (SPF/DMARC) detected — exercise caution if this IP is used for mail relay

5. Geolocation Validation: The RTT violation suggests this may be a mirror or anycast node; verify actual physical location if geolocation accuracy is critical

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## Intelligence Narrative

IP 54.39.203.27 functions as cloud infrastructure within OVH's Canadian hosting environment, specifically associated with Ahrefs Pte Ltd. The IP currently shows no active malicious behavior, but the subnet's high abuse density (0.707) indicates this hosting block has been leveraged for malicious activities by other tenants. The geolocation validation failure (RTT implausibility for claimed location) is typical of cloud hosting and anycast deployments. While no direct threats were observed, the neighborhood context warrants continued monitoring, particularly for outbound connections from this IP range. The absence of open services and firewalled status reduces immediate exploitation risk, though the high sibling threat count (181 out of 225 active IPs) suggests this environment may be attractive for command-and-control infrastructure or compromised tenants.

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