51.161.65.199
IP Intelligence Briefing: 51.161.65.199
Date: June 2026
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**1. Core Profile**
- Risk Assessment: Moderate Risk (Risk Score: 50). No malicious indicators detected.
- Ownership:
- ASN: 16276 (OVH).
- Organization: Ahrefs Pte Ltd (registered under OVH-CUST-281059690).
- Geolocation: Singapore (country code CA, likely misclassification).
- Network Role: CloudCompute infrastructure (OVH-hosted, no public services).
- Threat Indicators: Clean. No abuse confidence scores, blacklist entries, or campaign ties.
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**2. Observation History**
- Recent Activity (Last 30 Days):
- Stable as a cloud-hosted IP (OVH provider).
- No port scanning or TLS certificate anomalies detected.
- DNS resolution consistently linked to `proxy-ca011-san199.ahrefs.net`.
- Geolocation Discrepancy:
- RTT (27ms) inconsistent with 6,082km distance to Singapore.
- Likely synthetic or spoofed geolocation.
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**3. Network Relationships**
- DNS Associations:
- Resolves to `proxy-ca011-san199.ahrefs.net` (Ahrefs’ internal proxy).
- No external domain hosting or email authentication records.
- Network Links:
- Subnet: `51.161.65.0/24` (OVH-managed).
- Shared ASN (16276) with 248 sibling IPs (132 active, 76 flagged as risky).
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**4. Neighborhood Analysis**
- Subnet Abuse Density: 30.65% (moderate risk).
- Neighbor Risks:
- 65 IPs with medium risk (avg. score 40–50).
- 35 IPs with low risk (avg. score 25–30).
- Notable Neighbors:
- `51.161.65.0` (high risk, 40 score).
- `51.161.65.4` (medium risk, 50 score).
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**5. Recommendations**
- Monitor: Track geolocation anomalies and subnet abuse density.
- Verify: Confirm Ahrefs’ use of this IP for legitimate cloud infrastructure.
- Network Segmentation: Isolate high-risk neighbors in the `51.161.65.0/24` subnet.
- DNS Analysis: Investigate `proxy-ca011-san199.ahrefs.net` for potential spoofing.
Conclusion: This IP is part of a cloud infrastructure with no direct malicious activity. However, geolocation inconsistencies and a moderately risky subnet warrant further scrutiny.
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-san199.ahrefs.net |
| Forward Confirmed | No — PTR hostname does not resolve back to this IP (weak signal) |
| Forward Hostnames | proxy-ca011-san199.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 | 32% | 2 | 4 |
| routing | 13% | 1 | 1 |
| services | 15% | 2 | 2 |
| ownership | 19% | 2 | 2 |
| reputation | 32% | 1 | 3 |
| geolocation | 34% | 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 | 2026-05-23 12:23:59 UTC |
| Last Seen | 2026-06-28 21:36:28 UTC |
| Profile Built | 2026-06-29 03:40:03 UTC |
| Data Freshness | Live |
| Signal Types | 21 |
| Total Observations | 23 |
Full dossier details are available via our API.