51.222.95.120📋 Copy

# INTELLIGENCE BRIEFING: 51.222.95.120/32

Classification: Moderate Risk (Score: 40/100)

Date: 2026-06-20

Analyst: IPDebrief SOC Intelligence

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## EXECUTIVE SUMMARY

IP address 51.222.95.120 is classified as a moderate-risk infrastructure endpoint hosted on OVH cloud compute infrastructure. The address resolves to ahrdfs.net with no open services detected. Despite moderate individual risk scoring, the /24 subnet exhibits high abuse density (0.7539) with 193 of 256 sibling IPs flagged as threats.

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## OWNERSHIP & INFRASTRUCTURE

Control Plane Analysis:

• BGP Prefix: 51.222.0.0/16
• Route Stability: Stable (0 route changes in 30d)
• RPKI State: Validated
• Delegation Age: 9,229 days
• DNSSEC: Valid

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## NETWORK THREAT INDICATORS

Blacklist Status:

• DNSBL Listings: 1 of 8 lists
• Abuse Confidence Score: Not assessed
• Known Campaigns: None detected
• Threat Feeds: No indicators

Threat Classification:

• Is Tor Exit: No
• Is Known Attacker: No
• Is Spam Source: No
• Is Proxy/VPN: No

DNS Analysis:

• PTR Hostname: proxy-ca010-san120.ahrefs.net
• Forward Resolution: 1 hostname (ahrefs.net)
• Email Authentication: No SPF/DMARC records
• Domain Reputation: Not scored

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## GEOSPATIAL DISCREPANCY

Note: Critical geolocation inconsistency detected.

• Registered Country: CA (Canada)
• Reported Coordinates: Singapore region
• Distance: 5,597.9 km
• RTT Violation: 26ms vs minimum possible 112ms for distance
• Assessment: Geolocation data unreliable; source validation recommended

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## SUBNET NEIGHBORHOOD ANALYSIS

Subnet: 51.222.95.0/24

Abuse Density: 0.7539 (HIGH)

Classification: high_abuse

Sibling Statistics:

• Total Siblings: 256
• Active Siblings: 213 (83% utilization)
• Threat Siblings: 193 (76% threat rate)

Risk Distribution:

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

Inherited Risk Score: 30/100

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## OBSERVATION HISTORY

Total Observations: 27 signals tracked

Recent Activity (2026-06-20):

• Operator Score: 0.4348 (Basic classification)
• DNS Resolution: Confirmed to ahrefs.net
• Blacklist Check: High-severity listing detected
• Port Scan: Multiple ports scanned (details trimmed)

Temporal Analysis:

• Ownership Changes: 0 (Stable)
• Threat Persistence Days: 0
• Is Persistently Malicious: No
• Threat Observation Count: 1

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## RELATIONSHIP MAPPING

Total Relationships: 35 detected

Primary Relationship Types:

• Same Network: Multiple instances of OVH-CUST-281059689

Correlated Entities:

• Hosted Domain: ahrefs.net
• Network: OVH customer subnet

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## SERVICE FINGERPRINTING

Assessment: No active services detected; endpoint appears firewalled or passive.

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## RECOMMENDED ACTIONS

Firewall Rules:

• iptables: `iptables -A INPUT -s 51.222.95.120 -j DROP`
• nftables: `nft add rule inet filter input ip saddr 51.222.95.120 drop`
• nginx: `deny 51.222.95.120;`
• pfSense: Block 51.222.95.120/32
• Cloudflare WAF: Block rule with expression `ip.src eq 51.222.95.120`
• AWS WAF: Block address `51.222.95.120/32`

Mitigation Priority: MEDIUM

• The subnet's high abuse density warrants monitoring
• Individual IP lacks active threat indicators
• Consider blocking at perimeter if traffic patterns match malicious behavior

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## INTELLIGENCE ASSESSMENT

51.222.95.120 presents as a low-threat infrastructure endpoint within a high-abuse environment. The IP itself shows no active malicious indicators, but the parent subnet (51.222.95.0/24) demonstrates elevated abuse rates. The geolocation discrepancy suggests potential data quality issues that warrant validation.

Recommended Approach: Monitor rather than block; investigate any suspicious traffic patterns from this subnet. The high abuse density indicates legitimate infrastructure that may be compromised or misused, requiring contextual analysis before enforcement.

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Source: IPDebrief Intelligence Platform

Data Freshness: Current as of 2026-06-20

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