51.161.65.88
IP Intelligence Briefing: 51.161.65.88/32
*Generated via IPDebrief Analysis*
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**1. Risk Profile**
- Risk Score: 40 (Moderate Risk)
- Ownership:
- ISP/Provider: OVH (ASN 16276)
- Organization: Dmytro, Ahrefs Pte Ltd
- Network: OVH-CUST-281059690
- Geolocation:
- Country: Canada (CA)
- City: Singapore (geo validation questionable)
- Accuracy Radius: 3,000 km
- Threat Indicators:
- No known malicious activity, spam, or attacker campaigns.
- DNSSEC Valid: Yes.
- DNSBL Listings: 1/8 (low confidence).
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**2. Network & Subnet Analysis**
- Subnet: 51.161.65.88/24
- Abuse Density: 50.59% (High Abuse Classification)
- Neighbor Risk:
- Total Siblings: 253 IPs
- Active Siblings: 170
- Threat Siblings: 128 (medium/high risk)
- Risk Distribution: 95% medium, 5% low.
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**3. Historical Observations**
- Recent Activity (2026-06-15):
- Listed in 2 threat feeds (confidence 0.85).
- Geolocation inferred as Canada (56.13°N, -106.35°W).
- Subnet abuse density flagged as "high_abuse."
- Stability:
- BGP route stability: Unstable (0 route changes in 30 days).
- Operator score: 0.2174 (Minimal Risk).
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**4. Relationships & Context**
- Linked Entities:
- Network: OVH-CUST-281059690
- Domains: `ahrefs.net` (PTR hostname: `proxy-ca011-san88.ahrefs.net`).
- Services:
- No open ports or TLS certificates detected.
- Hosted domains: 0.
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**5. Recommendations**
- Monitor Subnet: High abuse density in 51.161.65.0/24 suggests potential lateral movement or compromised hosts.
- Verify Geolocation: Discrepancy between inferred Canada and Singapore location may indicate misconfigured DNS or spoofing.
- Check DNSBL Listings: Investigate 1/8 DNSBL entries for potential spam or phishing activity.
- Block/Allowlist: Consider blocking the subnet if it correlates with suspicious activity, given its association with Ahrefs (a legitimate SEO tool) but high abuse density.
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*End of Briefing*
*Generated by IPDebrief – Cybersecurity Threat Intelligence Platform*
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-san88.ahrefs.net |
| Forward Confirmed | No — PTR hostname does not resolve back to this IP (weak signal) |
| Forward Hostnames | proxy-ca011-san88.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 | 39% | 2 | 3 |
| routing | 13% | 1 | 1 |
| services | 15% | 2 | 2 |
| ownership | 15% | 2 | 2 |
| reputation | 22% | 1 | 2 |
| geolocation | 33% | 2 | 3 |
| Overall | 23% | 10 | 13 |
| Data Coherence | Mostly Consistent (80%) — 1 contradiction(s) |
| Attribution | Low (35%) |
| OwnershipFCrDNSGeo ConsensusGeo PlausibleIRR MatchRPKI Valid |
📅 Observation Timeline 🔄 Live
| First Seen | 2026-05-15 20:48:18 UTC |
| Last Seen | 2026-06-28 02:55:53 UTC |
| Profile Built | 2026-06-28 21:01:47 UTC |
| Data Freshness | Live |
| Signal Types | 19 |
| Total Observations | 22 |
Full dossier details are available via our API.