51.161.37.82
IP Intelligence Briefing: 51.161.37.82
Date: 2026-06-14
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**1. Core Profile**
- Risk Score: 40 (Moderate Risk)
- Ownership: Registered to Ahrefs Pte Ltd (OVH ASN 16276).
- Geolocation:
- Country: Canada (CA)
- City: Singapore (inconsistent with distance metrics).
- Latitude/Longitude: Unavailable.
- Threat Indicators: No malicious activity detected (no indicators, blacklists, or campaigns).
- Network Role: Hosting provider (OVH infrastructure).
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**2. Observation History**
- Recent Activity (Last 30 Days):
- 23 observations, with 14 linked to high_abuse subnet classification.
- Geolocation anomalies: RTT (43ms) inconsistent with 6082km distance (minimum expected: 121.6ms).
- BGP analysis: Stable route with OVH ASN, no recent route changes.
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**3. Relationships**
- Network: Part of OVH-CUST-281059684 subnet (51.161.37.0/24).
- DNS:
- PTR hostname: `proxy-ca005-san82.ahrefs.net` (linked to Ahrefs).
- No email authentication records (SPF/DKIM).
- Certificates: No TLS certificates or HTTP services detected.
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**4. Subnet Analysis**
- Subnet: 51.161.37.0/24
- Abuse Density: 57.48% (high abuse classification).
- Neighbor Risk:
- 146/254 IPs in subnet flagged as threats.
- 87 IPs with medium risk, 13 with low risk.
- Key Neighbors:
- IPs like `51.161.37.0` (risk score 50) and `51.161.37.1` (risk score 40) show similar risk profiles.
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**5. Recommendations**
- Monitor: Track this IP for unexpected DNS changes or new services (e.g., TLS certificates).
- Network Segmentation: Isolate high-risk subnets (51.161.37.0/24) to mitigate lateral movement risks.
- Verify Geolocation: Investigate inconsistencies in geolocation data (e.g., Singapore vs. Canada).
- Check Ahrefs: Review Ahrefs’ infrastructure for potential misconfigurations or abuse.
Conclusion: While the IP itself shows no direct malicious activity, its subnet’s high abuse density and OVH hosting role warrant closer scrutiny. Focus on subnet-level threats and ensure network segmentation to limit potential exposure.
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-san82.ahrefs.net |
| Forward Confirmed | No — PTR hostname does not resolve back to this IP (weak signal) |
| Forward Hostnames | proxy-ca005-san82.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 | 26% | 2 | 4 |
| routing | 13% | 1 | 1 |
| services | 15% | 2 | 2 |
| ownership | 15% | 2 | 2 |
| reputation | 28% | 1 | 3 |
| geolocation | 35% | 2 | 3 |
| Overall | 22% | 10 | 15 |
| Data Coherence | Mostly Consistent (80%) — 1 contradiction(s) |
| Attribution | Low (35%) |
| OwnershipFCrDNSGeo ConsensusGeo PlausibleIRR MatchRPKI Valid |
📅 Observation Timeline 🔄 Live
| First Seen | 2026-05-07 23:04:25 UTC |
| Last Seen | 2026-06-27 06:20:24 UTC |
| Profile Built | 2026-06-28 00:24:02 UTC |
| Data Freshness | Live |
| Signal Types | 21 |
| Total Observations | 26 |
Full dossier details are available via our API.