54.39.136.128
IP Intelligence Briefing: 54.39.136.128
Date: 2026-06-05
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**1. Core Profile**
- Risk Rating: Moderate (Risk Score: 40)
- Ownership:
- ASN: 16276 (OVH)
- Organization: Dmytro, Ahrefs Pte Ltd
- Subnet: 54.39.136.0/24
- Geolocation:
- Country: Canada (QC, Beauharnois)
- Coordinates: Unknown
- Network Role:
- Hosting provider (OVH)
- No open ports or TLS services detected
- Classified as "Firewalled / No Services"
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**2. Threat Indicators**
- No direct malicious activity: No indicators of spam, attacks, or blacklisted status.
- Subnet Risk:
- Abuse Density: 51.81% (high abuse classification)
- Inherited Risk: 20 (from subnet)
- Threat Siblings: 129/249 IPs in subnet flagged as risky
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**3. Historical Observations (30-Day Window)**
- Stability: Unstable BGP routes (route changes detected).
- Activity Trends:
- Subnet abuse density increased from 0.45 to 0.52 over 30 days.
- No persistent malicious activity detected.
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**4. Network Relationships**
- Linked Entities:
- OVH-CUST-281059681 (same subnet)
- ahrefs.net (DNS domain)
- DNS:
- PTR hostname: `proxy-ca002-san128.ahrefs.net`
- DNSSEC validated, CAA records present.
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**5. Neighborhood Analysis**
- Subnet: 54.39.136.0/24
- Neighbor Risk Distribution:
- High Risk: 0 IPs
- Medium Risk: 86 IPs
- Low Risk: 14 IPs
- Total Siblings: 249 IPs (121 active, 129 flagged as risky).
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**6. Recommendations**
- Monitor Subnet: High abuse density suggests potential for lateral movement or compromised hosts.
- Block High-Risk Neighbors: Consider isolating IPs with elevated risk scores (e.g., 40+).
- Verify Hosting Activity: Confirm legitimacy of OVH-hosted services; ensure no unauthorized use.
- Check DNSSEC Compliance: Validate DNS records for ahrefs.net to prevent spoofing.
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Note: This IP appears benign but resides in a high-risk subnet. SOC teams should prioritize monitoring and segmentation to mitigate potential exposure.
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-san128.ahrefs.net |
| Forward Confirmed | No — PTR hostname does not resolve back to this IP (weak signal) |
| Forward Hostnames | proxy-ca002-san128.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 | 26% | 2 | 4 |
| routing | 13% | 1 | 1 |
| services | 12% | 2 | 2 |
| ownership | 15% | 2 | 2 |
| reputation | 28% | 1 | 3 |
| geolocation | 23% | 2 | 2 |
| Overall | 20% | 10 | 14 |
| Data Coherence | Consistent (100%) |
| Attribution | Moderate (50%) |
| OwnershipFCrDNSGeo ConsensusGeo PlausibleIRR MatchRPKI Valid |
📅 Observation Timeline 🔄 Live
| First Seen | 2026-05-10 16:14:41 UTC |
| Last Seen | 2026-06-27 18:07:01 UTC |
| Profile Built | 2026-06-28 12:12:35 UTC |
| Data Freshness | Live |
| Signal Types | 20 |
| Total Observations | 25 |
Full dossier details are available via our API.