54.39.136.1
IP Intelligence Briefing: 54.39.136.1
Date: 2026-06-04
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**1. Profile Summary**
- Risk Score: 40 (Moderate Risk)
- Provider: OVH (ASN 16276)
- Organization: Ahrefs Pte Ltd (OVH-CUST-281059681)
- Geolocation: Canada (QC, Beauharnois), inferred from DNS and routing data.
- Network Role: Cloud compute infrastructure (OVH-hosted, no public services detected).
- Threat Indicators: No direct malicious activity (no abuse confidence, spam, or known attacker flags).
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**2. Observation History**
- Recent Signals:
- Geolocation: Confirmed as Canada (QC, Beauharnois) with 3000km accuracy radius.
- Network Stability: Route instability detected (BGP route changes in 30 days).
- DNS: Resolves to `proxy-ca002-san1.ahrefs.net` (linked to Ahrefs).
- Trend: No significant changes in risk profile over time.
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**3. Relationships**
- Network Links:
- Subnet: `54.39.136.0/24` (OVH-CUST-281059681).
- Linked to Ahrefs Pte Ltd (cloud hosting provider).
- DNS:
- PTR record: `proxy-ca002-san1.ahrefs.net` (no email auth records).
- Certificates/TLS: No TLS certificates or services detected.
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**4. Neighborhood Analysis**
- Subnet: `54.39.136.0/24` (247 IPs total).
- Abuse Density: 50.2% (high abuse classification).
- Neighbor Risk:
- 86 IPs with medium risk (40–50 score).
- 14 IPs with low risk.
- Notable: 124 neighbors flagged as threats (potential botnet or malicious activity).
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**5. Threat Assessment**
- Direct Risk: Low. No direct malicious indicators (no blacklists, spam, or campaigns).
- Indirect Risk: High. Subnet has high abuse density (50.2%), suggesting potential for network compromise.
- Recommendations:
- Monitor subnet for unusual traffic patterns.
- Block high-risk neighbors (e.g., IPs with >50 risk score) if not required for operations.
- Verify Ahrefs’ compliance with security best practices for cloud infrastructure.
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Source: IPDebrief Threat Intelligence Platform.
Note: This briefing is for defensive analysis. Further investigation may be required for confirmed threats.
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-281059681 |
| CIDR Block | 54.39.136.0/24 |
| RIR | ARIN |
| Country | Singapore |
| Abuse Contact | — |
🌐 DNS Intelligence
| PTR | proxy-ca002-san1.ahrefs.net |
| Forward Confirmed | No — PTR hostname does not resolve back to this IP (weak signal) |
| Forward Hostnames | proxy-ca002-san1.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 | 24% | 2 | 4 |
| routing | 13% | 1 | 1 |
| services | 12% | 2 | 2 |
| ownership | 15% | 2 | 2 |
| reputation | 28% | 1 | 3 |
| geolocation | 21% | 2 | 2 |
| Overall | 19% | 10 | 14 |
| Data Coherence | Consistent (100%) |
| Attribution | Moderate (50%) |
| OwnershipFCrDNSGeo ConsensusGeo PlausibleIRR MatchRPKI Valid |
📅 Observation Timeline 🔄 Live
| First Seen | 2026-05-08 05:02:25 UTC |
| Last Seen | 2026-06-27 12:50:46 UTC |
| Profile Built | 2026-06-28 06:56:14 UTC |
| Data Freshness | Live |
| Signal Types | 21 |
| Total Observations | 26 |
Full dossier details are available via our API.