54.39.210.128📋 Copy

# IP Intelligence Briefing: 54.39.210.128/32

## Executive Summary

The IP address 54.39.210.128 is associated with OVH hosting infrastructure in Canada and presents a moderate risk profile (Risk Score: 40). The address belongs to a high-abuse density subnet (54.39.210.0/24) with an abuse density of 0.7852 and 201 threat-identified sibling IPs out of 256 total addresses. The IP resolved to a domain associated with ahrefs.net but is hosted on cloud infrastructure rather than representing the legitimate service.

## Network Infrastructure

• Organization: Dmytro, Ahrefs Pte Ltd
• ASN: 16276 (OVH)
• CIDR Block: 54.39.210.0/24
• Geolocation: Canada, Quebec, Beauharnois (±3,000km accuracy radius)
• Infrastructure Type: Cloud/Hosting environment
• Connection Type: Firewall protected with no open services detected

## Threat Indicators

• Blacklist Status: Listed on 1 of 8 DNSBLs
• Threat Classifications: Not identified as Tor exit node, known attacker, or spam source
• Campaign Activity: No known campaign associations detected
• Operator Score: 0.2174 (Minimal risk rating)
• Route Stability: Unstable routing configuration detected

## DNS Analysis

• PTR Hostname: proxy-ca007-san128.ahrefs.net
• Forward Resolution: Confirms ahrefs.net domain association
• Email Authentication: SPF and DMARC records absent
• DNSSEC: Valid delegation with CAA records present

## Neighborhood Analysis

The /24 subnet (54.39.210.0/24) exhibits elevated risk characteristics:

• Abuse Density: 0.7852 (high classification)
• Threat Siblings: 201 IPs flagged as threats
• Risk Distribution: 100 medium-risk neighbors across sampled addresses
• Inherited Risk: 31 from subnet-level analysis

## Historical Observations

Nineteen observations recorded, with recent activity dated 2026-06-26. Key signals included:

• Cloud infrastructure classification confirmed
• Multiple blacklist listings detected with high severity
• DNS and ownership signals consistently present
• No persistent malicious behavior patterns observed

## Recommended Actions

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

iptables:

```

iptables -A INPUT -s 54.39.210.128 -j DROP

```

nftables:

```

nft add rule inet filter input ip saddr 54.39.210.128 drop

```

Cloudflare WAF:

```json

{

"description": "Block 54.39.210.128 — IPDebrief risk score 40",

"action": "block",

"filter": {

"expression": "ip.src eq 54.39.210.128"

}

}

```

AWS WAF:

```json

{

"Addresses": ["54.39.210.128/32"],

"Description": "IPDebrief risk 40"

}

```

## Analyst Notes

While the IP resolves to a legitimate ahrefs.net domain, the hosting environment is located on OVH infrastructure with no services actively running. The high-abuse subnet context warrants traffic blocking or rate-limiting, particularly given the DNSBL listing. The absence of open ports suggests the IP may be used for outbound connections or as a relay endpoint. Monitor for any service activation on this address.

Classification: Moderate Risk

Confidence Level: Medium

Recommended Action: Block at perimeter firewall with monitoring

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