54.39.89.226📋 Copy

# IP INTELLIGENCE BRIEFING: 54.39.89.226/32

Classification: Moderate Risk – Subnet Context Warning

Date: 2026-06-15

Analyst: IPDebrief Intelligence Team

## EXECUTIVE SUMMARY

IP 54.39.89.226 is a cloud hosting endpoint within OVH infrastructure associated with the ahrefs.net domain ecosystem. While the individual IP shows no direct malicious activity indicators, the /24 subnet (54.39.89.0/24) demonstrates elevated abuse characteristics with high abuse density (0.7539) and 193 flagged threat siblings out of 256 total addresses.

## NETWORK IDENTIFICATION

## THREAT ASSESSMENT

Individual IP Risk Score: 40/100 (Moderate Risk)

Direct Indicators

• Blacklist Status: 0 direct blacklist hits
• Tor Exit Node: No
• Known Attacker: No
• Spam Source: No
• Known Campaigns: None identified
• Open Services: None detected (firewalled/no services)
• DNS Records: proxy-ca012-san226.ahrefs.net (ahrefs.net domain)

Subnet Context Risk

The parent /24 subnet exhibits concerning abuse patterns:

• Abuse Density: 0.7539 (HIGH)
• Threat Siblings: 193 of 256 IPs flagged as threats
• Active Siblings: 125 currently active
• Inherited Risk: 30/100
• Risk Distribution: All 100 sampled neighbors show consistent riskScore of 40

## OBSERVATION HISTORY

Analysis of 19 signal observations reveals:

• Recent DNS resolution to ahrefs.net infrastructure
• High abuse density classification confirmed in recent scans
• 8 total DNSBL listings with 1 active listing (maximum severity: high)
• Operator score: 0.2174 (Minimal threat operator classification)
• No evidence of persistent malicious behavior or sustained threat campaigns

## RELATIONSHIP GRAPH

37 relationships identified, primarily network-level associations:

• Multiple Same Network references to OVH-CUST-281059691
• No interconnection to known malicious campaigns or coordinated botnet infrastructure

## RECOMMENDED ACTIONS

Based on risk profile and subnet context, the following defensive measures are recommended:

Firewall Blocking:

```bash

# iptables

iptables -A INPUT -s 54.39.89.226 -j DROP

# nftables

nft add rule inet filter input ip saddr 54.39.89.226 drop

# Cloudflare WAF

{"description":"Block 54.39.89.226 — IPDebrief risk score 40","action":"block"}

```

Operational Guidance:

• Monitor for lateral movement within the 54.39.89.0/24 subnet
• Consider subnet-level blocking due to high abuse density
• Investigate any traffic patterns from the ahrefs.net reverse DNS hostname
• Evaluate context: ahrefs.net is a legitimate SEO tools provider; verify business justification for this endpoint

## CONCLUSION

IP 54.39.89.226 presents moderate risk primarily driven by subnet-level abuse patterns rather than direct malicious activity. The legitimate DNS association with ahrefs.net suggests potential legitimate hosting, but the high-density abuse environment warrants defensive blocking and ongoing monitoring. SOC analysts should correlate with local threat intelligence and consider the operational context before implementing blocking measures.

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*Intelligence generated by IPDebrief™ — Defensive Security Platform*

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