54.39.0.183📋 Copy

# Intelligence Briefing: IP 54.39.0.183

## Executive Summary

IP 54.39.0.183 was classified as Moderate Risk with a risk score of 40. The address operates under OVH cloud infrastructure (AS16276) and resolves to the ahrefs.net domain namespace. Despite showing no persistent malicious activity, the IP resides within a high-abuse density subnet (54.39.0.0/24) exhibiting significant threat activity among neighboring addresses.

## Technical Profile

Ownership & Infrastructure:

• ASN: 16276 (OVH)
• Organization: Dmytro, Ahrefs Pte Ltd
• Network: OVH-CUST-281059683 / 54.39.0.0/24
• Infrastructure Type: CloudCompute (hosting environment)
• DNS: proxy-ca004-san183.ahrefs.net (forward resolved)

Geolocation:

• Country: Canada (CA)
• Region: Quebec (QC)
• City: Beauharnois
• Geolocation consensus: True (1 source)
• GeoPlausible flag: False (potential data inconsistency)

Network Classification:

• Cloud: Yes
• Hosting: Yes
• CDN: No
• Proxy/VPN/Tor: No
• Mobile: No
• Residential: No
• Bogon: No

Services:

• Open ports: None detected
• TLS Certificate: Not detected
• HTTP Banner: Not detected
• Classification: Firewalled / No Services

Threat Indicators:

• Known Attacker: No
• Spam Source: No
• Tor Exit Node: No
• Known Campaigns: None
• Blacklist Count: 0
• DNSBL Listed: 1 of 8 total lists

## Historical Analysis

Observation history recorded 20 signals. The IP demonstrated stable ownership with zero ownership changes. Threat persistence days measured at 0, indicating no persistently malicious behavior. Historical signals included consistent cloud infrastructure classification from June 2020 through June 2026.

Geolocation data showed validation issues with RTT measurements (26ms observed vs. 112.6ms minimum possible for 5,629km distance). Control plane analysis indicated route instability with isRouteStable set to false.

## Network Context

Subnet Analysis (54.39.0.0/24):

• Abuse Density: 0.707 (high_abuse classification)
• Total Siblings: 256
• Active Siblings: 220
• Threat Siblings: 181
• Inherited Risk Score: 28

Relationship Graph:

• 41 relationships identified
• Primary relationship type: Same Network (OVH-CUST-281059683)
• No external organization or certificate relationships detected

Neighborhood Risk Distribution (Sampled 100 neighbors):

• High Risk: 0
• Medium Risk: 58
• Low Risk: 42

## Recommended Actions

Based on risk profile assessment, the following security actions are recommended:

Firewall Rules:

```bash

iptables -A INPUT -s 54.39.0.183 -j DROP

nft add rule inet filter input ip saddr 54.39.0.183 drop

nginx: deny 54.39.0.183;

```

Cloud Provider Rules:

• Cloudflare WAF: Block with expression `ip.src eq 54.39.0.183` (Risk score: 40)
• AWS WAF: Block address 54.39.0.183/32 with description "IPDebrief risk 40"

Risk Mitigation Notes:

• No recommended blocking actions were generated by the system due to moderate risk classification
• However, subnet-level abuse density (0.707) suggests consideration of broader subnet filtering
• Monitor for correlation with other threat indicators in the 54.39.0.0/24 range
• The high number of threat siblings (181) within the subnet indicates elevated lateral risk potential

## Assessment Summary

IP 54.39.0.183 presented as a cloud-based hosting address with moderate risk characteristics. While the IP itself showed no active malicious indicators, its placement within a high-abuse subnet with significant threat activity among neighboring addresses warrants monitoring. The lack of open services and firewalled status reduced immediate exploitability, but the network context suggests potential for abuse in other addresses within the same /24 block.

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