IP Intelligence Briefing: 51.161.65.71
*Generated via IPDebrief Threat Intelligence Platform*
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**1. Core Profile**
- Risk Score: 40 (Moderate Risk)
- Ownership:
- ASN: 16276 (OVH)
- Organization: Dmytro, Ahrefs Pte Ltd
- Network: OVH-CUST-281059690
- Geolocation:
- Country: Canada (CA)
- City: Singapore
- Coordinates: Unresolved
- Threat Indicators:
- No malicious indicators, spam, or known attacker activity.
- No DNSBL listings.
- Network Role:
- Cloud Compute Hosting (OVH infrastructure)
- No CDN, VPN, Tor, or residential/reseller ISP activity.
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**2. Observation History**
- Recent Activity (Last 30 Days):
- Subnet abuse density: 0.5686 (High Abuse classification).
- 145 malicious sibling IPs in the 51.161.65.0/24 subnet.
- No persistent malicious activity or campaign associations.
- Stability:
- Route instability detected (BGP route changes).
- Operator score: 0.2174 (Minimal).
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**3. Relationships & Dependencies**
- Network Associations:
- Linked to OVH-CUST-281059690 (same network).
- DNS: `proxy-ca011-san71.ahrefs.net` (Ahrefs Pte Ltd).
- Certificates & Services:
- No TLS certificates or open ports detected.
- No HTTP server banners or email authentication records.
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**4. Neighborhood Analysis**
- Subnet: 51.161.65.0/24
- Neighbor Risk:
- 100 IPs in subnet (255 total).
- 96 IPs flagged as medium risk (score 40โ50), 4 low risk.
- Subnet abuse density: 0.5686 (High Abuse).
- Inherited Risk: 22 (moderate).
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**5. Actionable Insights**
- Monitor Subnet: The 51.161.65.0/24 subnet has a high abuse density, suggesting potential for lateral movement or shared hosting compromises.
- Verify Hosting: Ahrefs Pte Ltdโs cloud infrastructure may require closer scrutiny if this IP is associated with unusual traffic patterns.
- Check DNS: The `proxy-ca011-san71.ahrefs.net` hostname is tied to this IP; ensure it aligns with expected Ahrefs infrastructure.
- No Immediate Mitigation: No direct threats detected, but subnet-level risks warrant ongoing monitoring.
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Threat Level: Moderate (Subnet-Level Risk)
Recommended Next Steps: Correlate with internal logs, verify DNS behavior, and monitor the 51.161.65.0/24 subnet for anomalies.
*Generated by IPDebrief Threat Intelligence Platform*
This summary was generated by AI and may contain inaccuracies. Verify critical details independently.
๐ข 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 | โ |
๐ DNS Intelligence
| PTR | proxy-ca011-san71.ahrefs.net |
| Forward Confirmed | No โ PTR hostname does not resolve back to this IP (weak signal) |
| Forward Hostnames | proxy-ca011-san71.ahrefs.net |
๐ DNS Hygiene
| Hygiene Score | 40% (Fair) |
| SPF | Not configured |
| DMARC | Not configured |
| FCrDNS | Not verified |
| DNSSEC | Valid |
| CAA | Present |
โ๏ธ Network Classification
| Infrastructure | Infrastructure / Datacenter |
| Service Purpose | Firewalled / No Services |
| Network Tier | Hosting โ Infrastructure provider without advanced routing |
๐ 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 | โ |
| HTTP Title | โ |
๐ TLS Certificate
| SANs | None |
| Valid From | โ |
| Valid Until | โ |
๐ฏ 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 | 15% | 2 | 2 |
| ownership | 15% | 2 | 2 |
| reputation | 28% | 1 | 3 |
| geolocation | 25% | 2 | 2 |
| Overall | 21% | 10 | 14 |
| Data Coherence | Consistent (100%) |
| Attribution | Moderate (50%) |
| OwnershipFCrDNSGeo ConsensusGeo PlausibleIRR MatchRPKI Valid |
๐ Observation Timeline ๐ Live
| First Seen | 2026-05-23 12:24:00 UTC |
| Last Seen | 2026-06-28 21:37:59 UTC |
| Profile Built | 2026-06-29 09:42:57 UTC |
| Data Freshness | Live |
| Signal Types | 21 |
| Total Observations | 24 |
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