# IP Intelligence Briefing: 51.222.168.34/32
Classification: Moderate Risk IP Address โ High-Abuse Cloud Infrastructure Environment
Report Date: 2026-06-21
Intel Level: Operational
Assigned Risk Score: 40/100
---
## Executive Summary
IP 51.222.168.34 is an OVH CloudCompute host within a high-abuse density subnet (51.222.168.0/24). While the individual IP lacks direct threat indicators, the subnet exhibits 80.47% abuse density with 206 of 229 active sibling IPs classified as threats. The IP resolves to the Ahrefs domain infrastructure and is registered under OVH-CUST-281059697.
---
## Technical Profile
| Attribute | Value |
|---|---|
| **ASN** | 16276 (OVH) |
| **Organization** | Dmytro, Ahrefs Pte Ltd |
| **Network** | 51.222.168.0/24 |
| **Geolocation** | CA (Canada) โ 3000km accuracy radius |
| **Infrastructure** | CloudCompute, Hosting |
| **DNS Resolution** | proxy-ca018-san34.ahrefs.net |
| **Open Ports/Services** | None detected |
| **Threat Indicators** | None identified |
| **Blacklist Status** | Clean (0 listings) |
---
## Risk Assessment
Individual IP Risk: 40/100 (Moderate)
Subnet Abuse Density: 80.47% (High)
Inherited Risk Score: 32/100
Threat Persistence: Not persistent (single observation)
Key Observations:
- Subnet 51.222.168.0/24 contains 256 total IPs with 229 active
- 206 active sibling IPs classified as threats
- Operator score: 0.2174 (Minimal)
- Route stability: False
- DNSSEC: Valid
---
## Relationship Graph
36 relationships identified, primarily same-network associations to OVH-CUST-281059697. No external certificate or hostname relationships beyond Ahrefs infrastructure. Traceroute indicates 18 hops with Comcast as transit network; 6 hops timed out.
---
## Historical Observations
21 total observations recorded. Recent activity (2026-06-21) shows:
- Subnet classification: High-abuse
- Geolocation signals: Inconsistent (CA with 3000km radius)
- Cloud infrastructure: Confirmed OVH
- No threat campaign correlation
---
## Recommended Actions
Firewall/Blocking Rules:
- iptables: `iptables -A INPUT -s 51.222.168.34 -j DROP`
- nftables: `nft add rule inet filter input ip saddr 51.222.168.34 drop`
- Nginx: `deny 51.222.168.34;`
- Cloudflare WAF: Block with expression `ip.src eq 51.222.168.34`
- AWS WAF: Add `51.222.168.34/32` to IP set
Operational Guidance:
- Block at perimeter firewall due to high-abuse subnet context
- Monitor for lateral movement if any internal systems interact with this IP
- Ahrefs domain association requires correlation with legitimate traffic patterns
- Consider subnet-level filtering if organizational risk tolerance allows
---
## Intelligence Conclusion
IP 51.222.168.34 presents a moderate individual risk but operates within a high-threat cloud environment. The combination of 80.47% subnet abuse density and 206 threat siblings warrants defensive blocking. No direct evidence of malicious activity exists for this specific IP, but the neighborhood context suggests elevated risk exposure. Recommend blocking at network edge and monitoring for any outbound connections from internal systems to this address.
Status: Action Required
Priority: Medium
This summary was generated by AI and may contain inaccuracies. Verify critical details independently.
๐ข Ownership & Registration
| Organization | Dmytro, Ahrefs Pte Ltd |
| ASN | AS16276 |
| Network Name | OVH-CUST-281059697 |
| CIDR Block | 51.222.168.0/24 |
| RIR | ARIN |
| Country | Singapore |
| Abuse Contact | โ |
๐ DNS Intelligence
| PTR | proxy-ca018-san34.ahrefs.net |
| Forward Confirmed | No โ PTR hostname does not resolve back to this IP (weak signal) |
| Forward Hostnames | proxy-ca018-san34.ahrefs.net |
๐ DNS Hygiene
| Hygiene Score | 40% (Fair) |
| SPF | Not configured |
| DMARC | Not configured |
| FCrDNS | Not verified |
| DNSSEC | Valid |
| CAA | Present |
โ๏ธ Network Classification
| Infrastructure | Infrastructure / Datacenter |
| Service Purpose | Firewalled / No Services |
| Network Tier | Hosting โ Infrastructure provider without advanced routing |
๐ Services & Open Ports
| Port | Service | Protocol | Banner |
|---|---|---|---|
| No open ports detected | |||
| Closed Ports | 22, 25, 80, 443, 3389, 8080, 8443 (0 open / 7 scanned) | ||
| Server | โ |
| HTTP Title | โ |
๐ TLS Certificate
| SANs | None |
| Valid From | โ |
| Valid Until | โ |
๐ฏ Confidence Breakdown
Per-dimension confidence scores based on source diversity and data freshness
| Dimension | Score | Sources | Observations |
|---|---|---|---|
| threat | 42% | 2 | 6 |
| routing | 8% | 1 | 1 |
| services | 15% | 2 | 2 |
| ownership | 19% | 2 | 2 |
| reputation | 26% | 1 | 4 |
| geolocation | 19% | 2 | 2 |
| Overall | 21% | 10 | 17 |
| Data Coherence | Mostly Consistent (80%) โ 1 contradiction(s) |
| Attribution | Low (35%) |
| OwnershipFCrDNSGeo ConsensusGeo PlausibleIRR MatchRPKI Valid |
๐ Observation Timeline ๐ Live
| First Seen | 2026-05-25 18:48:22 UTC |
| Last Seen | 2026-06-29 02:11:13 UTC |
| Profile Built | 2026-06-29 02:13:33 UTC |
| Data Freshness | Live |
| Signal Types | 22 |
| Total Observations | 22 |
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