51.161.37.166
IP Intelligence Briefing: 51.161.37.166
Date: 2026-06-11
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**1. IP Profile**
- Risk Rating: Moderate Risk (Risk Score: 40)
- Ownership:
- ASN: 16276 (OVH)
- Organization: Dmytro, Ahrefs Pte Ltd
- Netname: OVH-CUST-281059684
- Geolocation:
- Country: Canada (CA)
- City: Singapore
- Latitude/Longitude: Not fully resolved (accuracy radius: 3000 km)
- Network Role:
- Provider: OVH (CloudCompute)
- Subnet: 51.161.37.0/24
- Classification: High abuse density (63.28%)
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**2. Threat & Activity**
- Threat Indicators:
- No direct malicious indicators (no known campaigns, blacklists, or spam).
- Subnet abuse density: High (162/256 siblings flagged as threats).
- Services:
- No open ports or TLS certificates detected.
- DNS PTR hostname: `proxy-ca005-san166.ahrefs.net` (linked to Ahrefs).
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**3. Historical Observations**
- Recent Activity (Last 30 Days):
- No persistent malicious behavior.
- Subnet abuse density increased from 0.5 to 0.63.
- No changes in ownership or network role.
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**4. Relationships**
- Network Associations:
- Linked to OVH-CUST-281059684 (same subnet).
- DNS association with `proxy-ca005-san166.ahrefs.net` (Ahrefs).
- Organizational Context:
- Ahrefs is a legitimate SEO tool provider, but its infrastructure may be probed for exploitation.
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**5. Neighborhood Analysis**
- Subnet: 51.161.37.0/24
- Neighbor Risk Distribution:
- High Risk: 0 IPs
- Medium Risk: 98 IPs
- Low Risk: 2 IPs
- Abuse Density: 63.28% (classified as "high_abuse").
- Notable Neighbors:
- 162/256 IPs in the subnet are flagged as threats.
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**6. Recommendations**
- Monitoring:
- Continuously monitor the 51.161.37.0/24 subnet due to high abuse density.
- Investigate the DNS hostname `proxy-ca005-san166.ahrefs.net` for potential C2 or data exfiltration.
- Network Segmentation:
- Consider isolating high-risk subnets to limit lateral movement.
- Threat Intelligence:
- Cross-reference with Ahrefs' infrastructure for potential compromise indicators.
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End of Briefing
*Generated by IPDebrief – Cybersecurity Threat Intelligence Platform*
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-281059684 |
| CIDR Block | 51.161.37.0/24 |
| RIR | ARIN |
| Country | Singapore |
| Abuse Contact | — |
🌐 DNS Intelligence
| PTR | proxy-ca005-san166.ahrefs.net |
| Forward Confirmed | No — PTR hostname does not resolve back to this IP (weak signal) |
| Forward Hostnames | proxy-ca005-san166.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 | |||
| 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 | 27% | 2 | 3 |
| routing | 8% | 1 | 1 |
| services | 8% | 1 | 1 |
| ownership | 19% | 2 | 2 |
| reputation | 22% | 1 | 3 |
| geolocation | 35% | 2 | 3 |
| Overall | 20% | 9 | 13 |
| Data Coherence | Mostly Consistent (80%) — 1 contradiction(s) |
| Attribution | Low (35%) |
| OwnershipFCrDNSGeo ConsensusGeo PlausibleIRR MatchRPKI Valid |
📅 Observation Timeline 🔄 Live
| First Seen | 2026-05-26 12:52:13 UTC |
| Last Seen | 2026-06-29 03:09:51 UTC |
| Profile Built | 2026-06-29 03:12:45 UTC |
| Data Freshness | Live |
| Signal Types | 22 |
| Total Observations | 22 |
Full dossier details are available via our API.