51.161.37.234
IP Intelligence Briefing: 51.161.37.234
*Generated via IPDebrief Analysis*
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**Key Findings**
- Risk Profile: Moderate risk (score: 50) with no direct threat indicators (no malware, spam, or attacker associations).
- Ownership: Registered to Ahrefs Pte Ltd (OVH ASN 16276), a legitimate hosting provider. Subnet 51.161.37.0/24 shows mixed risk with 55% medium-risk neighbors.
- Geolocation: Montreal, Canada (QC). Geolocation data shows plausible origin, but RTT anomalies suggest potential misconfiguration or spoofing.
- Network Role: Identified as a cloud compute instance (OVH provider), likely hosting Ahrefs infrastructure. No signs of CDN, VPN, or proxy activity.
- DNS Associations: Linked to hostname proxy-ca005-san234.ahrefs.net, consistent with Ahrefs' domain structure.
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**Threat Observations**
- No Malicious Activity: No abuse confidence scores, blacklist entries, or campaign correlations.
- Subnet Analysis: Subnet 51.161.37.0/24 has 252 IPs, with 108 flagged as high-risk. While the IP itself is low-risk, the subnet’s abuse density (42.86%) warrants monitoring.
- Historical Data: First observed on June 1, 2026, as a cloud-hosted server. No persistent malicious behavior detected.
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**Recommended Actions**
1. Monitor Subnet Activity: Track neighboring IPs (e.g., 51.161.37.0–255) for unusual traffic patterns or new high-risk entries.
2. Verify DNS Configuration: Confirm DNS records for proxy-ca005-san234.ahrefs.net align with Ahrefs’ infrastructure to prevent spoofing.
3. Allow Traffic with Caution: Permit traffic from this IP as part of legitimate hosting operations, but ensure firewall rules include subnet-level scrutiny.
4. Check for Configuration Issues: Investigate RTT anomalies (e.g., 28ms vs. expected 121ms) to rule out geolocation spoofing or misconfigured routing.
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Conclusion: 51.161.37.234 is a legitimate cloud-hosted IP associated with Ahrefs. While no direct threats are detected, its subnet contains a notable number of high-risk IPs. SOC teams should monitor for deviations in behavior or unexpected traffic patterns.
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-san234.ahrefs.net |
| Forward Confirmed | No — PTR hostname does not resolve back to this IP (weak signal) |
| Forward Hostnames | proxy-ca005-san234.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 | 33% | 2 | 3 |
| Overall | 24% | 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 21:00:50 UTC |
| Last Seen | 2026-06-28 16:08:24 UTC |
| Profile Built | 2026-06-29 04:12:21 UTC |
| Data Freshness | Live |
| Signal Types | 21 |
| Total Observations | 24 |
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