51.161.65.205
IP Intelligence Briefing: 51.161.65.205
*Generated via IPDebrief tools: Profile, History, Relationships, & Neighborhood Analysis*
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**Core Profile**
- Risk Score: 40 (Moderate Risk)
- Ownership:
- ASN: 16276 (OVH)
- Organization: Dmytro, Ahrefs Pte Ltd
- Network: OVH-CUST-281059690
- Geolocation:
- Country: Canada (CA)
- City: Singapore
- Geo Plausibility: False (RTT mismatch for distance)
- Threat Indicators: No detected malicious activity, spam, or known attackers.
- Network Role: CloudCompute (OVH-hosted infrastructure).
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**Observation History**
- Latest Activity: 2026-06-09
- Abuse Density: 0.54 (high-risk subnet, 54.33% of neighbors flagged).
- Threat Persistence: No persistent malicious signals.
- Key Trends:
- Subnet classification: High Abuse.
- Inherited risk: 21/100 (moderate).
- 138 threat siblings in the 51.161.65.0/24 subnet.
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**Relationships**
- Network Associations:
- Linked to OVH-CUST-281059690 (same network).
- DNS: PTR hostname `proxy-ca011-san205.ahrefs.net` (Ahrefs infrastructure).
- Certificates: No TLS/SSL certificates detected.
- No Correlated Threat Campaigns.
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**Neighborhood Analysis**
- Subnet: 51.161.65.0/24
- Abuse Density: 54.33% (high-risk).
- Neighbor Risk Distribution:
- Medium Risk: 96 IPs
- Low Risk: 4 IPs
- High Risk: 0 IPs
- Active Siblings: 172 IPs (138 flagged as threats).
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**Actionable Insights**
1. Monitor Subnet Activity: The 51.161.65.0/24 subnet has a high abuse density. Investigate traffic patterns between 51.161.65.205 and neighboring IPs.
2. Verify DNS Configuration: The PTR hostname `proxy-ca011-san205.ahrefs.net` may indicate a proxy or load balancer. Confirm if this aligns with Ahrefs’ infrastructure.
3. Geolocation Discrepancy: The IP’s reported location in Singapore conflicts with its RTT (27ms) for a 6,082km distance. Validate geolocation accuracy.
4. Network Segmentation: Given the subnet’s high risk, consider isolating this IP from critical assets.
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Conclusion: 51.161.65.205 is part of a high-risk OVH subnet linked to Ahrefs. While no direct threats are detected, the neighborhood’s abuse density and moderate risk score warrant closer monitoring. Further investigation into DNS associations and subnet activity is recommended.
This summary was generated by AI and may contain inaccuracies. Verify critical details independently.
🏢 Ownership & Registration
| Organization | Dmytro, Ahrefs Pte Ltd |
| ASN | AS16276 |
| Network Name | OVH-CUST-281059690 |
| CIDR Block | 51.161.65.0/24 |
| RIR | ARIN |
| Country | Singapore |
| Abuse Contact | — |
🌐 DNS Intelligence
| PTR | proxy-ca011-san205.ahrefs.net |
| Forward Confirmed | No — PTR hostname does not resolve back to this IP (weak signal) |
| Forward Hostnames | proxy-ca011-san205.ahrefs.net |
🔐 DNS Hygiene
| Hygiene Score | 40% (Fair) |
| SPF | Not configured |
| DMARC | Not configured |
| FCrDNS | Not verified |
| DNSSEC | Valid |
| CAA | Present |
☁️ Network Classification
| Infrastructure | Infrastructure / Datacenter |
| Service Purpose | Firewalled / No Services |
| Network Tier | Hosting — Infrastructure provider without advanced routing |
🔌 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 | — |
| HTTP Title | — |
🔐 TLS Certificate
| SANs | None |
| Valid From | — |
| Valid Until | — |
🎯 Confidence Breakdown
Per-dimension confidence scores based on source diversity and data freshness
| Dimension | Score | Sources | Observations |
|---|---|---|---|
| threat | 31% | 2 | 4 |
| routing | 13% | 1 | 1 |
| services | 15% | 2 | 2 |
| ownership | 19% | 2 | 2 |
| reputation | 31% | 1 | 3 |
| geolocation | 33% | 2 | 3 |
| Overall | 24% | 10 | 15 |
| Data Coherence | Mostly Consistent (80%) — 1 contradiction(s) |
| Attribution | Low (35%) |
| OwnershipFCrDNSGeo ConsensusGeo PlausibleIRR MatchRPKI Valid |
📅 Observation Timeline 🔄 Live
| First Seen | 2026-05-21 21:00:51 UTC |
| Last Seen | 2026-06-28 16:12:17 UTC |
| Profile Built | 2026-06-29 04:15:49 UTC |
| Data Freshness | Live |
| Signal Types | 21 |
| Total Observations | 24 |
Full dossier details are available via our API.