54.39.136.170📋 Copy

# IP Intelligence Briefing: 54.39.136.170/32

## Executive Summary

The IP address 54.39.136.170 is a moderate-risk (50) cloud infrastructure endpoint operated by OVH on behalf of Ahrefs Pte Ltd. The IP resolves to a hostname in the ahrefs.net domain and is located in Quebec, Canada, though geolocation data shows significant anomalies. The subnet exhibits high abuse density with 174 out of 256 active siblings flagged as threats.

## Network Profile

• IP Address: 54.39.136.170/32
• Risk Score: 50 (Moderate Risk)
• ASN: 16276 (OVH)
• Organization: Dmytro, Ahrefs Pte Ltd
• Network: 54.39.136.0/24
• Infrastructure Type: CloudCompute / Hosting
• Country: Canada (CA)
• Region: Quebec (QC)
• City: Beauharnois

## Threat Indicators

• DNSBL Listings: 2 of 8 lists
• Tor Exit: No
• Known Attacker: No
• Spam Source: No
• Active Threats: None currently detected
• Network Role: Firewalled / No Services (no open ports detected)

## Geolocation Anomalies

Geolocation data exhibits significant inconsistencies:

• Claimed location: Beauharnois, Quebec
• Inferred geolocation: Latitude 56.13, Longitude -106.35 (implies Canadian Arctic region)
• RTT Anomaly: Observed RTT of 27ms contradicts minimum possible RTT of 112.6ms for 5,628km distance
• Geo-plausibility: False

## Subnet Analysis

The /24 subnet (54.39.136.0/24) demonstrates elevated abuse characteristics:

• Abuse Density: 0.6797 (High)
• Classification: High Abuse
• Active Siblings: 182
• Threat Siblings: 174
• Inherited Risk Score: 27
• Neighborhood Risk Distribution: 100 medium-risk IPs, 0 high-risk IPs

## DNS Resolution

• PTR Hostname: proxy-ca002-san170.ahrefs.net
• Resolved Domain: ahrefs.net
• Forward Confirmation: False
• DNSSEC Valid: Yes
• CAA Records: Present
• Email Authentication: No SPF or DMARC records detected

## Historical Observations (19 Total)

Recent signals indicate:

• Multiple confirmed OVH hosting classification
• Consistent ahrefs.net DNS association
• Persistent geolocation discrepancies
• No persistent malicious activity observed (threat persistence: 0 days)
• No ownership changes detected

## Relationship Graph

• Network Associations: Multiple entries for OVH-CUST-281059681
• DNS Associations: proxy-ca002-san170.ahrefs.net (15 relationship entries)
• No external campaign correlations

## Recommended Actions

Based on risk profile, the following firewall rules are recommended:

iptables:

```bash

iptables -A INPUT -s 54.39.136.170 -j DROP

```

nftables:

```bash

nft add rule inet filter input ip saddr 54.39.136.170 drop

```

nginx:

```nginx

deny 54.39.136.170;

```

Cloudflare WAF:

```json

{"description":"Block 54.39.136.170 — IPDebrief risk score 50","action":"block","filter":{"expression":"ip.src eq 54.39.136.170"}}

```

AWS WAF:

```json

{"Addresses":["54.39.136.170/32"],"Description":"IPDebrief risk 50"}

```

## Intelligence Assessment

This IP represents legitimate cloud infrastructure (OVH hosting for Ahrefs) but resides in a high-abuse-density subnet. The geolocation anomalies and DNSBL listings suggest potential reputation issues within the hosting environment. While no active malicious indicators are present, the inherited subnet risk (27) and high abuse density warrant monitoring. The moderate risk score (50) combined with the subnet context suggests defensive blocking may be warranted depending on organizational threat tolerance.

Classification: Moderate Risk — Monitor/Block Based on Context

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