54.39.203.105
IP Intelligence Briefing: 54.39.203.105
Date: 2026-06-08
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**1. Core Profile**
- Risk Score: Moderate (50/100)
- Provider: OVH (ASN 16276)
- Organization: Ahrefs Pte Ltd (OVH-CUST-281059687)
- Geolocation: Canada (QC, Beauharnois)
- Network Role: Cloud Compute (OVH Hosting)
- Subnet: 54.39.203.0/24 (Abuse Density: 44.98%)
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**2. Threat Indicators**
- No Direct Threats: No malicious indicators, spam, or known attacker associations.
- DNS Associations: Linked to `proxy-ca008-san105.ahrefs.net` (likely a legitimate proxy service).
- Security Posture:
- DNSSEC valid, CAA records present.
- Subnet shows mixed classification with 112 threat siblings (medium/high risk).
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**3. Observation History**
- Recent Signals (30d):
- DNSSEC validation and CAA records (confidence: 60%).
- Subnet abuse density analysis (confidence: 19%).
- No persistent malicious activity or campaign correlations.
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**4. Relationships & Network**
- Key Associations:
- Same network: OVH-CUST-281059687.
- DNS: `proxy-ca008-san105.ahrefs.net` (AHREFS domain).
- Subnet Neighbors (54.39.203.0/24):
- 42 IPs flagged as medium risk.
- 58 IPs flagged as low risk.
- 17 inherited risk from subnet.
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**5. Actionable Insights**
- Monitor Subnet: The subnet has a moderate abuse density (44.98%), suggesting potential for future threats.
- Verify DNS Usage: Confirm legitimacy of `proxy-ca008-san105.ahrefs.net` as part of Ahrefs’ infrastructure.
- Watch for Changes: Track shifts in the subnet’s risk profile or new threat indicators.
- Firewall Rules: Consider blocking high-risk neighbors (42 IPs) if they are not part of your infrastructure.
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Conclusion:
This IP is part of a legitimate cloud-hosted service (Ahrefs) with no direct malicious activity. However, its subnet contains a notable number of medium-risk neighbors, warranting closer monitoring. No immediate mitigation is required, but ongoing observation 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-281059687 |
| CIDR Block | 54.39.203.0/24 |
| RIR | ARIN |
| Country | Singapore |
| Abuse Contact | — |
🌐 DNS Intelligence
| PTR | proxy-ca008-san105.ahrefs.net |
| Forward Confirmed | No — PTR hostname does not resolve back to this IP (weak signal) |
| Forward Hostnames | proxy-ca008-san105.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 | 29% | 2 | 4 |
| routing | 13% | 1 | 1 |
| services | 12% | 2 | 2 |
| ownership | 19% | 2 | 2 |
| reputation | 31% | 1 | 3 |
| geolocation | 33% | 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 | 2026-05-19 03:36:42 UTC |
| Last Seen | 2026-06-28 08:35:29 UTC |
| Profile Built | 2026-06-29 02:40:51 UTC |
| Data Freshness | Live |
| Signal Types | 21 |
| Total Observations | 24 |
Full dossier details are available via our API.