51.222.168.130📋 Copy

# IP Intelligence Briefing: 51.222.168.130/32

Classification: Moderate Risk / High-Abuse Infrastructure

Date: Analysis based on current observational data

IP Address: 51.222.168.130

---

## Executive Summary

IP address 51.222.168.130 is assigned to OVH (ASN 16276) within the 51.222.168.0/24 subnet under organization "Dmytro, Ahrefs Pte Ltd." The IP presents a moderate overall risk score of 40 but operates within a high-abuse density subnet (0.7812) with 200 of 256 sibling IPs classified as threats. Geographic data validation failed with RTT anomalies indicating distance inconsistencies. No direct threat indicators (Tor exit, known attacker, or spam source) were observed, but infrastructure is hosted on OVH cloud services with DNS PTR records pointing to Ahrefs infrastructure.

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## Technical Profile

Ownership & Classification:

• Provider: OVH (ASN 16276)
• Organization: Dmytro, Ahrefs Pte Ltd
• CIDR Block: 51.222.168.0/24
• Infrastructure Type: Cloud Hosting
• RIR: ARIN

Geolocation Discrepancy:

• Reported Country: Canada (CA)
• Actual Location: Singapore
• Validation Status: FAILED
• Distance Violation: RTT 26ms vs minimum possible 112ms for 5,598km separation
• Accuracy Radius: 3,000km (exceeds plausible bounds)

Network Role:

• Cloud Infrastructure: Yes
• CDN/VPN/Proxy: No
• Hosting: Yes
• Bogon: No

---

## Threat Indicators

Direct Threats: None observed

• Tor Exit Node: No
• Known Attacker: No
• Spam Source: No
• Blacklist Count: 0

Subnet Threat Context:

• Abuse Density: 0.7812 (HIGH)
• Threat Siblings: 200 of 256 IPs in /24 subnet
• Neighborhood Classification: high_abuse
• Inherited Risk Score: 31

---

## DNS & Network Resolution

• PTR Hostname: proxy-ca018-san130.ahrefs.net
• Forward Resolution: 51.222.168.130 → proxy-ca018-san130.ahrefs.net
• Hosted Domain: ahrefs.net
• Open Ports: None detected
• Active Services: Firewallled / No Services

---

## Historical Observations

Total signal observations: 31

• Recent Activity: 2026-06-25 (cloud infrastructure classification confirmed)
• Subnet Abuse Density: Recorded 2026-06-19 as high_abuse (0.7812)
• Certificate Scanning: Observed 2026-06-19 (0 certificates resolved)
• Threat Persistence: 0 days
• Is Persistently Malicious: No

---

## Recommended Security Actions

Firewall Rule Recommendations:

```bash

# iptables

iptables -A INPUT -s 51.222.168.130 -j DROP

# nftables

nft add rule inet filter input ip saddr 51.222.168.130 drop

# nginx

deny 51.222.168.130;

```

Cloud WAF Integration:

• Cloudflare WAF: Block with expression `ip.src eq 51.222.168.130`
• AWS WAF: Add to block list with CIDR 51.222.168.130/32

---

## Intelligence Assessment

The IP should be treated with elevated caution despite moderate overall risk scoring. The high-abuse subnet classification (0.7812 density, 200 threat siblings) combined with geographic validation failure suggests potential misconfiguration, compromised hosting, or legitimate services operating in an abuse-prone environment. The Ahrefs-associated DNS records indicate this may be legitimate SEO/marketing infrastructure, but the subnet-level abuse context warrants monitoring.

Recommended Actions:

1. Implement blocking at perimeter firewall per rules above

2. Monitor for service activity on this IP

3. Consider subnet-level blocking (51.222.168.0/24) if lateral threat movement is suspected

4. Update geo-IP databases with validated Singapore location

---

Analysis Generated: IPDebrief Intelligence Platform

Data Sources: Full profile, neighborhood analysis, relationship graph, observation history

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