51.222.168.183
IP Intelligence Briefing: 51.222.168.183
Date: 2026-06-15
---
**1. Core Profile**
- Risk Score: 25 (Low Risk)
- Ownership:
- Organization: Ahrefs Pte Ltd (OVH ASN 16276)
- Network: OVH-CUST-281059697 (51.222.168.0/24)
- Geolocation:
- Country: Canada (CA)
- Region: QC (Quebec)
- City: Singapore (geo-plausibility flagged as questionable)
- Network Role:
- Type: Cloud Compute (OVH infrastructure)
- Services: No open ports; no TLS/HTTP signatures detected.
---
**2. Threat & Behavior**
- Threat Indicators:
- No malicious indicators, abuse reports, or spam associations.
- DNS: Linked to `proxy-ca018-san183.ahrefs.net` (Ahrefs infrastructure).
- Observation History (Last 30 Days):
- DNSSEC: Validated (no issues).
- CAA Records: Present, no misconfigurations.
- Operator Score: "Minimal" risk (0.2174).
- Abuse Density: 0.416 (moderate risk in subnet).
---
**3. Relationships & Dependencies**
- Network Associations:
- Part of OVH-CUST-281059697 (51.222.168.0/24).
- Subnet Abuse Density: 41.6% (104/250 IPs flagged).
- DNS Links:
- Resolves to `proxy-ca018-san183.ahrefs.net` (Ahrefs domain).
- No email authentication (SPF/DKIM) detected.
---
**4. Neighborhood Analysis**
- Subnet: 51.222.168.0/24
- Neighbor Risk Distribution:
- High Risk: 0 IPs
- Medium Risk: 97 IPs
- Low Risk: 3 IPs
- Notable Neighbors:
- 51.222.168.0 (riskScore: 40)
- 51.222.168.1 (riskScore: 40)
- 51.222.168.2 (riskScore: 50)
---
**5. Recommendations**
- Monitoring:
- Track DNS activity for `proxy-ca018-san183.ahrefs.net` to confirm legitimacy.
- Monitor the 51.222.168.0/24 subnet for unusual traffic patterns.
- Firewall:
- Consider allowing traffic only from trusted sources for the subnet.
- Apply granular rules for Ahrefs-related domains.
- Validation:
- Verify geolocation anomalies (Singapore vs. Canada) with the ISP.
Conclusion: This IP is associated with legitimate Ahrefs infrastructure but resides in a subnet with moderate abuse risk. No immediate threat detected, but ongoing monitoring is advised.
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-281059697 |
| CIDR Block | 51.222.168.0/24 |
| RIR | ARIN |
| Country | Singapore |
| Abuse Contact | — |
🌐 DNS Intelligence
| PTR | proxy-ca018-san183.ahrefs.net |
| Forward Confirmed | No — PTR hostname does not resolve back to this IP (weak signal) |
| Forward Hostnames | proxy-ca018-san183.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 | 8% | 1 | 1 |
| services | 15% | 2 | 2 |
| ownership | 19% | 2 | 2 |
| reputation | 32% | 1 | 3 |
| geolocation | 27% | 2 | 3 |
| Overall | 23% | 10 | 15 |
| Data Coherence | Mostly Consistent (80%) — 1 contradiction(s) |
| Attribution | Low (35%) |
| OwnershipFCrDNSGeo ConsensusGeo PlausibleIRR MatchRPKI Valid |
📅 Observation Timeline 🔄 Live
| First Seen | 2026-05-25 00:41:38 UTC |
| Last Seen | 2026-06-29 01:02:57 UTC |
| Profile Built | 2026-06-29 07:06:42 UTC |
| Data Freshness | Live |
| Signal Types | 23 |
| Total Observations | 24 |
Full dossier details are available via our API.