51.161.65.82
IP Intelligence Briefing: 51.161.65.82
*Generated via IPDebrief analysis*
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**1. Core Profile**
- Risk Score: 40 (Moderate Risk)
- Ownership:
- ISP: OVH (ASN 16276)
- Organization: Dmytro, Ahrefs Pte Ltd
- Subnet: 51.161.65.0/24
- Geolocation:
- Country: Canada (QC, Montreal)
- Plausibility: Invalid (RTT inconsistency with 6,082km distance)
- Threat Indicators:
- No direct malicious activity (no malware, phishing, or C2 indicators).
- Subnet abuse density: High (0.5433), with 138 threat siblings in 254 total IPs.
- Network Role:
- Cloud Compute (OVH-hosted, no public services).
- DNS: Resolves to `proxy-ca011-san82.ahrefs.net` (Ahrefs.net).
- BGP: Prefix `51.161.0.0/17`, route stability: Unstable.
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**2. Temporal Observations**
- History:
- Last 30 days: No persistent malicious activity.
- Subnet abuse density increased from 0.42 to 0.54 (June 9, 2026).
- Geo Validation:
- Spoofed Location: RTT of 27ms inconsistent with 6,082km distance (min expected: 121.6ms).
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**3. Network Relationships**
- Subnet: 51.161.65.0/24
- Key Associations:
- OVH-CUST-281059690 (same network).
- Ahrefs.net (DNS host).
- Threat Context:
- 138 threat siblings in subnet (96 medium-risk, 4 high-risk).
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**4. Neighborhood Analysis**
- Subnet Abuse Density: 54.33% (High).
- Neighbor Risk Distribution:
- High Risk: 0 IPs
- Medium Risk: 96 IPs
- Low Risk: 4 IPs
- Notable Neighbors:
- 51.161.65.0 (risk score 40), 51.161.65.1 (risk score 40), etc.
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**5. Recommendations**
- Monitor Subnet: High abuse density suggests potential for lateral movement or shared infrastructure risks.
- Verify Geolocation: Investigate spoofed Montreal location; consider IP geolocation spoofing.
- Network-Level Mitigations:
- Block subnet `51.161.65.0/24` if further threats emerge.
- Apply DNS filtering for `ahrefs.net` to mitigate potential spoofing.
- SOC Actions:
- Correlate with known Ahrefs infrastructure for context.
- Watch for unusual traffic patterns in the subnet.
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*End of Briefing*
*Generated by IPDebrief – Threat Intelligence for SOC Teams*
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-san82.ahrefs.net |
| Forward Confirmed | No — PTR hostname does not resolve back to this IP (weak signal) |
| Forward Hostnames | proxy-ca011-san82.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 | 2026-05-21 21:00:52 UTC |
| Last Seen | 2026-06-28 16:14:17 UTC |
| Profile Built | 2026-06-29 04:18:04 UTC |
| Data Freshness | Live |
| Signal Types | 21 |
| Total Observations | 25 |
Full dossier details are available via our API.