51.161.37.36
IP Intelligence Briefing: 51.161.37.36
Date: 2026-06-09
**1. Risk Profile**
- Risk Score: 50 (Moderate Risk)
- Provider: OVH (AS16276)
- Ownership: Registered to *Dmytro, Ahrefs Pte Ltd* (OVH-CUST-281059684)
- Geolocation: Canada (country code CA), but DNS records point to Singapore (city field may be inaccurate).
- Network Role: Hosting provider (OVH infrastructure), no public services detected.
**2. Threat Indicators**
- No direct malicious activity: No indicators of spam, attacks, or abuse in threat feeds.
- DNS Associations: Linked to `proxy-ca005-san36.ahrefs.net` (likely a proxy server).
- Subnet Risk:
- /24 subnet (51.161.37.0/24): Mixed risk with 49 medium-risk IPs and 51 low-risk IPs.
- Abuse Density: 0.4048 (moderate risk within the subnet).
**3. Observation History**
- Recent Activity (30 days):
- Stable network classification.
- No persistent malicious behavior detected.
- DNS records show consistent resolution to Ahrefs-related domains.
**4. Relationships**
- Network: Same subnet as 120 active IPs, 102 of which are flagged as high-risk.
- DNS: Directly tied to Ahrefs' proxy infrastructure.
- Hosting: Likely used for cloud services (OVH hosting).
**5. Recommended Actions**
- Firewall Rules:
- Block the IP using standard rules (iptables, nftables, etc.).
- Example: `iptables -A INPUT -s 51.161.37.36 -j DROP`.
- Monitoring: Track DNS activity and subnet changes due to mixed risk in the /24 network.
- Geolocation Discrepancy: Investigate the Singapore vs. Canada location inconsistency.
Conclusion: This IP is part of a hosting network with no direct malicious signals, but its subnet contains a moderate risk of abuse. Monitor for unusual activity, especially given the mixed-risk environment.
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-281059684 |
| CIDR Block | 51.161.37.0/24 |
| RIR | ARIN |
| Country | Singapore |
| Abuse Contact | — |
🌐 DNS Intelligence
| PTR | proxy-ca005-san36.ahrefs.net |
| Forward Confirmed | No — PTR hostname does not resolve back to this IP (weak signal) |
| Forward Hostnames | proxy-ca005-san36.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 | |||
| 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 | 33% | 2 | 3 |
| routing | 13% | 1 | 1 |
| services | 8% | 1 | 1 |
| ownership | 19% | 2 | 2 |
| reputation | 31% | 1 | 3 |
| geolocation | 21% | 2 | 2 |
| Overall | 21% | 9 | 12 |
| Data Coherence | Consistent (100%) |
| Attribution | Moderate (50%) |
| OwnershipFCrDNSGeo ConsensusGeo PlausibleIRR MatchRPKI Valid |
📅 Observation Timeline 🔄 Live
| First Seen | 2026-05-21 14:57:54 UTC |
| Last Seen | 2026-06-28 14:13:42 UTC |
| Profile Built | 2026-06-29 02:18:06 UTC |
| Data Freshness | Live |
| Signal Types | 17 |
| Total Observations | 20 |
Full dossier details are available via our API.