51.161.37.175
IP Intelligence Briefing: 51.161.37.175
*Generated via IPDebrief tools: Profile, History, Relationships, & Neighbors*
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**1. Overview**
- Risk Score: Moderate (50/100)
- Ownership: Owned by OVH (ASN 16276), registered to Dmytro, Ahrefs Pte Ltd.
- Geolocation: Listed as Singapore (CA country code, potential data inconsistency).
- Network Role: Hosting provider (OVH), no open ports or TLS services detected.
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**2. Threat Indicators**
- No direct malicious activity detected (no blacklists, campaigns, or TLS threats).
- Subnet Risk:
- 51.161.37.0/24 has high abuse density (0.5118), with 130/254 IPs flagged as threats.
- Inherited Risk: 20% chance of association with malicious activity due to subnet context.
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**3. Observation History**
- First Seen: June 3, 2026.
- Signals:
- Classified as cloud-hosted (OVH), firewalled, and no public services.
- DNSSEC and CAA records present, but no email authentication (SPF/DKIM).
- Route stability: Unstable (0 route changes in 30 days).
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**4. Relationships**
- Network: Linked to OVH-CUST-281059684 (same ASN, subnet).
- DNS: Resolves to proxy-ca005-san175.ahrefs.net (Ahrefs Pte Ltd).
- No direct ties to known attackers, Tor, or spam sources.
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**5. Neighborhood Analysis**
- Subnet: 51.161.37.0/24.
- Neighbor Risk Distribution:
- 79% medium risk, 21% low risk.
- 130 IPs in subnet flagged as threats (abuse density: 51.18%).
- Actionable Insight: High-risk subnet suggests potential lateral movement or shared infrastructure risks.
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**6. Recommendations**
- Monitor Subnet: Due to high abuse density, investigate traffic patterns within 51.161.37.0/24.
- Restrict Access: Apply network segmentation to isolate this subnet from critical assets.
- Verify Geolocation: Investigate discrepancy in country code (CA vs. Singapore).
- Check DNS: Ensure DNSSEC and CAA records are properly configured for resilience.
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*End of Briefing*
*Generated by IPDebrief (© 2026 Jason Alberino)*
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-san175.ahrefs.net |
| Forward Confirmed | No — PTR hostname does not resolve back to this IP (weak signal) |
| Forward Hostnames | proxy-ca005-san175.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 | 20% | 2 | 3 |
| ownership | 15% | 2 | 2 |
| reputation | 28% | 1 | 3 |
| geolocation | 25% | 2 | 2 |
| Overall | 22% | 10 | 15 |
| Data Coherence | Consistent (100%) |
| Attribution | Moderate (50%) |
| OwnershipFCrDNSGeo ConsensusGeo PlausibleIRR MatchRPKI Valid |
📅 Observation Timeline 🔄 Live
| First Seen | 2026-05-07 23:04:25 UTC |
| Last Seen | 2026-06-27 06:11:31 UTC |
| Profile Built | 2026-06-28 00:16:08 UTC |
| Data Freshness | Live |
| Signal Types | 20 |
| Total Observations | 27 |
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