51.161.37.112
IP Intelligence Briefing: 51.161.37.112
Date: 2026-06-14
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**1. Core Profile**
- Risk Score: 40 (Moderate Risk)
- Ownership:
- ASN: 16276 (OVH)
- Organization: "Dmytro, Ahrefs Pte Ltd"
- Network: 51.161.37.0/24
- Geolocation:
- Country: Canada (CA)
- City: Singapore (geo validation flagged as implausible due to RTT anomalies)
- Network Role:
- Type: Cloud Compute (OVH)
- Hosting: Yes
- Subnet Abuse Density: 51.18% (high abuse classification)
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**2. Threat Indicators**
- No direct malicious activity detected (no indicators, blacklists, or campaigns).
- Neighboring IPs:
- Threat Siblings: 130/254 IPs in subnet (51.161.37.0/24) flagged as high-risk.
- Abuse Density: 51.18% (high abuse classification).
- DNS:
- Resolves to `proxy-ca005-san112.ahrefs.net` (linked to Ahrefs).
- No SPF/DKIM records detected.
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**3. Temporal Observations**
- Recent Activity (30 days):
- 1 threat observation (low confidence).
- Subnet abuse density increased from 51.18% (June 3) to 64.45% (June 14).
- Geolocation Anomalies:
- RTT (30ms) inconsistent with claimed distance (6,082km).
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**4. Relationships & Network**
- Linked Entities:
- Network: OVH-CUST-281059684 (51.161.37.0/24).
- Domain: `ahrefs.net` (resolves to IP).
- Control Plane:
- BGP Prefix: 51.161.0.0/17
- RPKI State: Not reported.
- Route Stability: Unstable (route changes detected).
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**5. Recommendations**
- Monitor Subnet: 51.161.37.0/24 has high abuse density; prioritize monitoring for lateral movement or command-and-control activity.
- Verify Geolocation: Investigate Singapore/Canada discrepancy; potential spoofing or misconfigured DNS.
- Block High-Risk Neighbors: Consider blocking IPs with >50 risk scores in the subnet.
- DNS Security: Enable SPF/DKIM for `ahrefs.net` to mitigate spoofing risks.
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Source: IPDebrief Threat Intelligence Platform | Product: IPDebrief | Copyright: 2026 Jason Alberino. All rights reserved.
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-san112.ahrefs.net |
| Forward Confirmed | No — PTR hostname does not resolve back to this IP (weak signal) |
| Forward Hostnames | proxy-ca005-san112.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 | 24% | 2 | 4 |
| routing | 8% | 1 | 1 |
| services | 12% | 2 | 2 |
| ownership | 19% | 2 | 2 |
| reputation | 28% | 1 | 3 |
| geolocation | 32% | 2 | 3 |
| Overall | 20% | 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 06:08:00 UTC |
| Profile Built | 2026-06-28 00:16:08 UTC |
| Data Freshness | Live |
| Signal Types | 22 |
| Total Observations | 27 |
Full dossier details are available via our API.