51.161.65.123
IP Intelligence Briefing: 51.161.65.123
Date: 2026-06-18
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**1. Core Profile**
- Risk Score: 40 (Moderate Risk)
- Ownership:
- AS: AS16276 (OVH)
- Organization: Dmytro, Ahrefs Pte Ltd (OVH-CUST-281059690)
- Geolocation: Montreal, Quebec, Canada (latitude 56.13, longitude -106.35)
- Network Role: CloudCompute (OVH infrastructure, hosting services)
- Threat Indicators: No known malicious activity, no blacklist entries, no Tor/VPN/proxy associations.
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**2. Observation History**
- Latest Activity: June 18, 2026 (minimal risk signals).
- Subnet Abuse:
- 51.161.65.0/24 has 0.5898 abuse density (high_abuse classification).
- 151 threat siblings (malicious IPs in the same subnet).
- Geolocation Discrepancy:
- RTT (24ms) inconsistent with 6,082km distance, suggesting potential spoofing or proxy use.
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**3. Network Relationships**
- Connected Entities:
- Linked to OVH-CUST-281059690 (same network).
- DNS: PTR hostname `proxy-ca011-san123.ahrefs.net` (Ahrefs domain).
- Services: No open ports, no TLS certificates, no HTTP services detected.
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**4. Neighborhood Analysis**
- Subnet: 51.161.65.0/24 (256 IPs).
- Risk Distribution:
- 98 IPs: Medium risk (score 40–50).
- 2 IPs: Low risk.
- Abuse Density: 58.98% of siblings are flagged as abusive.
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**5. Recommendations**
1. Monitor Subnet: High abuse density in 51.161.65.0/24 warrants closer scrutiny of traffic patterns.
2. Verify Geolocation: Investigate the RTT anomaly to rule out spoofing or proxy activity.
3. Check Ahrefs Infrastructure: Confirm if the associated Ahrefs domain is under active threat campaigns.
4. Network Segmentation: Consider isolating high-risk siblings in the subnet to mitigate potential lateral movement.
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Source: IPDebrief Threat Intelligence Platform
Note: This IP is associated with a legitimate cloud provider (OVH), but its subnet exhibits elevated abuse risk. Further investigation is advised.
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-san123.ahrefs.net |
| Forward Confirmed | No — PTR hostname does not resolve back to this IP (weak signal) |
| Forward Hostnames | proxy-ca011-san123.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 | 36% | 2 | 4 |
| routing | 13% | 1 | 1 |
| services | 15% | 2 | 2 |
| ownership | 19% | 2 | 2 |
| reputation | 31% | 1 | 3 |
| geolocation | 39% | 2 | 3 |
| Overall | 25% | 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 06:22:15 UTC |
| Profile Built | 2026-06-28 00:26:23 UTC |
| Data Freshness | Live |
| Signal Types | 22 |
| Total Observations | 28 |
Full dossier details are available via our API.