51.161.65.131
IP Intelligence Briefing: 51.161.65.131
*Generated from IPDebrief analysis (June 14, 2026)*
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**Risk Assessment**
- Overall Risk Score: 25 (Low Risk)
- Network Role: CloudCompute (OVH infrastructure)
- Ownership:
- ISP/Provider: OVH (ASN 16276)
- Organization: Dmytro, Ahrefs Pte Ltd
- Network: OVH-CUST-281059690
- Threat Indicators: No malicious activity detected. No known campaigns, spam, or blacklist entries.
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**Geolocation & Network Context**
- Location: Registered to Singapore (CA), but geoPlausible is false (RTT discrepancy).
- Subnet: 51.161.65.131/24
- Abuse Density: 45.97% (moderate risk)
- Neighbor Risk: 9 high-risk IPs, 91 medium-risk IPs, 9 low-risk IPs
- Active Siblings: 162/248 IPs in subnet
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**Observation History**
- First Seen: June 5, 2026
- Signal Stability: Stable routing (BGP route stability confirmed).
- DNS: Resolves to `proxy-ca011-san131.ahrefs.net` (ahrefs.net domain).
- Services: No open ports or TLS services detected.
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**Network Relationships**
- Linked Entities:
- Network: OVH-CUST-281059690
- Domains: ahrefs.net (CAA records present)
- Routing:
- BGP Path: 34549 16276
- RPKI State: Valid
- Route Stability: 30-day stability confirmed
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**Actionable Insights**
1. Monitor Subnet: The /24 subnet contains 9 high-risk neighbors; investigate potential lateral movement or shared infrastructure risks.
2. Verify Geolocation: Discrepancy between RTT (26ms) and distance (6,082km) suggests spoofed geolocation; validate with additional probes.
3. Cloud Instance: As a CloudCompute asset, ensure it aligns with Ahrefs’ legitimate operations. Check for unexpected outbound traffic.
4. DNS Security: Confirm DNSSEC and CAA records for `ahrefs.net` to prevent spoofing.
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Conclusion: 51.161.65.131 is a low-risk cloud instance associated with Ahrefs. While no direct threats are detected, the subnet’s moderate abuse density warrants ongoing monitoring.
*Generated by IPDebrief for SOC analysis.*
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-281059690 |
| CIDR Block | 51.161.65.0/24 |
| RIR | ARIN |
| Country | Singapore |
| Abuse Contact | — |
🌐 DNS Intelligence
| PTR | proxy-ca011-san131.ahrefs.net |
| Forward Confirmed | No — PTR hostname does not resolve back to this IP (weak signal) |
| Forward Hostnames | proxy-ca011-san131.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 | 28% | 2 | 4 |
| routing | 20% | 2 | 3 |
| services | 15% | 2 | 2 |
| ownership | 22% | 3 | 3 |
| reputation | 27% | 1 | 3 |
| geolocation | 31% | 2 | 3 |
| Overall | 24% | 12 | 18 |
| Data Coherence | Mostly Consistent (80%) — 1 contradiction(s) |
| Attribution | Low (35%) |
| OwnershipFCrDNSGeo ConsensusGeo PlausibleIRR MatchRPKI Valid |
📅 Observation Timeline 🔄 Live
| First Seen | 2026-05-08 23:18:41 UTC |
| Last Seen | 2026-06-27 14:37:21 UTC |
| Profile Built | 2026-06-28 08:43:44 UTC |
| Data Freshness | Live |
| Signal Types | 28 |
| Total Observations | 34 |
Full dossier details are available via our API.