51.161.37.90
IP Intelligence Briefing: 51.161.37.90
Date: 2026-06-10
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**Profile Summary**
- Risk Score: 50 (Moderate Risk)
- Provider: OVH (ASN 16276)
- Organization: Dmytro, Ahrefs Pte Ltd
- Geolocation: Montreal, Quebec, Canada (CA)
- Network Role: CloudCompute Hosting (OVH-managed subnet 51.161.37.0/24)
- Threat Indicators: No direct malicious activity detected (no malware, C2, or spam associations).
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**Observation History**
- Recent Activity:
- 2026-06-09: High-severity listings (truncated data) linked to the IP.
- 2026-06-01: DNS and network analysis confirmed ownership by Ahrefs.
- Trends: No persistent threat signals; IP appears stable but linked to mixed-risk subnets.
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**Network Relationships**
- DNS Associations:
- Linked to `proxy-ca005-san90.ahrefs.net` (Ahrefs infrastructure).
- Network Connections:
- Part of OVH subnet `51.161.37.0/24` (252 IPs total, 120 active).
- Subnet classified as "mixed" with 40.48% abuse density.
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**Subnet Neighborhood**
- Subnet: `51.161.37.0/24`
- Risk Distribution:
- 47 IPs with medium risk (score 25–50), 53 with low risk.
- No high-risk IPs reported.
- Abuse Density: 40.48% (moderate risk for subnet).
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**Actionable Insights**
1. Monitor Subnet: The 51.161.37.0/24 subnet has mixed risk; investigate neighboring IPs for potential compromises.
2. Verify Ahrefs Infrastructure: Confirm if the IP is part of legitimate Ahrefs services or anomalous activity.
3. DNS Monitoring: Track DNS records (`proxy-ca005-san90.ahrefs.net`) for unexpected changes or misuse.
4. Network Segmentation: Ensure cloud-hosted assets (OVH) are isolated from internal networks to mitigate potential lateral movement.
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Note: No direct malicious indicators found, but the IP’s association with a mixed-risk subnet warrants further investigation.
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-san90.ahrefs.net |
| Forward Confirmed | No — PTR hostname does not resolve back to this IP (weak signal) |
| Forward Hostnames | proxy-ca005-san90.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 | 29% | 2 | 4 |
| routing | 13% | 1 | 1 |
| services | 12% | 2 | 2 |
| ownership | 19% | 2 | 2 |
| reputation | 31% | 1 | 3 |
| geolocation | 33% | 2 | 3 |
| Overall | 23% | 10 | 15 |
| Data Coherence | Mostly Consistent (80%) — 1 contradiction(s) |
| Attribution | Low (35%) |
| OwnershipFCrDNSGeo ConsensusGeo PlausibleIRR MatchRPKI Valid |
📅 Observation Timeline 🔄 Live
| First Seen | 2026-05-20 17:48:39 UTC |
| Last Seen | 2026-06-28 12:23:47 UTC |
| Profile Built | 2026-06-29 06:28:34 UTC |
| Data Freshness | Live |
| Signal Types | 22 |
| Total Observations | 25 |
Full dossier details are available via our API.