54.39.210.79📋 Copy

## IP INTELLIGENCE BRIEFING: 54.39.210.79/32

Classification: Moderate Risk (Score: 50/100)

Date: June 20, 2026

Intelligence Source: IPDebrief Threat Intelligence Platform

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OWNERSHIP & INFRASTRUCTURE

Network Assignment:

• ASN: 16276 (OVH)
• Organization: Dmytro, Ahrefs Pte Ltd
• CIDR Block: 54.39.210.0/24
• Network Name: OVH-CUST-281059686
• Registry: RIPE NCC

Infrastructure Classification:

• Type: Cloud Compute / Hosting Provider
• Anycast: No
• CDN/Proxy/Vpn: No
• Tor Exit: No
• Status: Firewalled / No Services

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GEOLOCATION VALIDATION

Reported Location: Beauharnois, QC, Canada

Validation Status: ⚠️ GEOLOCATION INCONSISTENCY DETECTED

Anomaly: Reverse geolocation indicates 5,629km distance from probe location with minimum possible RTT of 112.6ms. Observed RTT was 27.0ms, which is physically impossible for this distance. This suggests either:

• Incorrect geolocation database
• IP spoofing or misattribution
• Data from an anonymized proxy

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DNS & NETWORK SERVICES

PTR Hostname: proxy-ca007-san79.ahrefs.net

Domain: ahrefs.net

Services: None detected (ports closed or filtered)

TLS/Certificates: No active certificates

HTTP: No open HTTP services

Email Authentication:

• SPF: Not configured
• DMARC: Not configured
• TXT Records: 0

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THREAT INDICATORS

DNSBL Status: Listed on 2 of 8 available threat lists

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NETWORK CONTEXT & ABUSE PROFILE

Subnet Analysis (54.39.210.0/24):

• Abuse Density: 0.8008 (High Abuse Classification)
• Total Siblings: 256 IPs
• Active Siblings: 178 IPs
• Threat Siblings: 205 IPs
• Inherited Risk: 32

Neighborhood Risk Distribution:

• High Risk: 0 IPs
• Medium Risk: 100 IPs
• Low Risk: 0 IPs

Assessment: The /24 subnet exhibits elevated abuse density with 80% of IPs flagged as medium-risk. This indicates a hosting environment with significant abuse potential or shared infrastructure risk.

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CONTROL PLANE DATA

• Origin ASN: 16276
• BGP Prefix: 54.39.0.0/16
• AS Path: 1403 → 16276
• Route Stability: Stable (no changes in 30 days)
• Delegation Age: 9,251 days (~25 years)
• RPKI State: Not validated
• DNSSEC: Valid
• Has CAA Records: Yes
• Operator Score: 0.4348 (Basic)

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OBSERVATION HISTORY

Total Observations: 23 signals

Recent Activity: June 20, 2026

Threat Persistence: 0 days

Persistent Malicious: No

Key Historical Signals:

• Subnet abuse density classification: high_abuse
• Ownership changes: 0 (stable ownership)
• ASN allocation: February 15, 2001 (legacy infrastructure)
• Multiple port scans detected (recent activity)

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RELATIONSHIP GRAPH

Total Relationships: 44

Primary Relationship Type: Same Network (OVH-CUST-281059686)

Correlated Entities:

• 39+ duplicate network relationships detected
• No external hostname or organization links beyond network assignment
• No certificate correlations

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RECOMMENDED ACTIONS

Firewall Implementation:

```bash

# iptables

iptables -A INPUT -s 54.39.210.79 -j DROP

# nftables

nft add rule inet filter input ip saddr 54.39.210.79 drop

# nginx

deny 54.39.210.79;

# pfSense

54.39.210.79/32

# Cloudflare WAF

{"description": "Block 54.39.210.79 — IPDebrief risk score 50", "action": "block", "filter": {"expression": "ip.src eq 54.39.210.79"}}

# AWS WAF

{"Addresses":["54.39.210.79/32"],"Description":"IPDebrief risk 50"}

```

---

10. INTELLIGENCE SUMMARY

Threat Assessment: This IP represents a moderate-risk endpoint hosted on OVH infrastructure within a high-abuse density subnet. The IP is associated with Ahrefs domain infrastructure (proxy-ca007-san79.ahrefs.net), but no active services or threat indicators have been detected.

Risk Factors:

1. Subnet Abuse Context: 80% of /24 neighbors flagged as medium risk

2. Geolocation Inconsistency: RTT validation failure suggests data integrity issues

3. DNSBL Listings: Present on 2 of 8 threat intelligence feeds

4. No Services: Closed ports may indicate compromised or dormant host

Recommendations:

• Implement blocking across perimeter defenses
• Monitor for service activation on this IP
• Consider blocking entire /24 if threat activity escalates
• Investigate geolocation discrepancy for potential

Recommendations (continued):

• Block entire /24 subnet only if specific threat patterns emerge across multiple IPs
• Enable logging for all traffic to this network range for forensic analysis
• Monitor DNS queries to ahrefs.net for potential data exfiltration patterns

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11. END-OF-LIFECYCLE STATUS

Last Updated: June 20, 2026 14:55 UTC

Data Freshness: Real-time (within 5 minutes)

Confidence Level: Moderate (0.70-0.85 average across signals)

Action Priority: Medium (implement blocking pending operational validation)

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12. DISPOSITION

Status: Pending Operational Review

Recommended Action: Block at perimeter, monitor for activity

Reassessment Trigger: Service activation, blacklist additions, or campaign correlation

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13. REPORT METADATA

Tool Version: IPDebrief v2026.06.20

Analysis Engine: Threat Intelligence Framework v4.2

Data Sources: 12+ feeds integrated

Coverage: Global threat intelligence aggregation

Classification: Internal Use (SOC Operations)

End of Briefing

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FOR SOC TEAM ACTION ONLY

*This intelligence is generated from automated threat detection systems. All findings must be validated through operational channels before enforcement.*

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