54.39.0.158
IP Intelligence Briefing: 54.39.0.158
Date: 2026-06-15
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**1. IP Profile**
- Reputation: Moderate Risk (Risk Score: 40)
- Ownership:
- ASN: 16276 (OVH)
- Organization: Ahrefs Pte Ltd (OVH-CUST-281059683)
- Geolocation: Canada (QC, Beauharnois), Latitude: 56.13, Longitude: -106.35
- Network Role: Cloud Compute (OVH Hosting)
- Threat Indicators: No malicious activity detected (no blacklists, spam, or campaigns).
- DNS:
- PTR hostname: `proxy-ca004-san158.ahrefs.net`
- No email authentication records (SPF/DKIM/DMArc).
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**2. Observation History (Last 30 Days)**
- Operator Score: 0.4783 ("Basic" risk label).
- Threat Trends:
- No persistent malicious activity.
- Subnet abuse density: 0.6245 (high abuse classification).
- 158 active siblings in the 54.39.0.0/24 subnet, with 158 threat siblings.
- Geolocation Validity: Plausible (3 km accuracy radius).
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**3. Relationships**
- Network Associations:
- Linked to OVH-CUST-281059683 (same network).
- DNS association with proxy-ca004-san158.ahrefs.net.
- Subnet Context:
- 54.39.0.0/24 subnet classified as high_abuse.
- 253 total siblings, 158 active, 158 flagged as threats.
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**4. Neighborhood Analysis**
- Subnet: 54.39.0.0/24
- Abuse Density: 62.45% (high risk).
- Neighbor Risk Distribution:
- 98 IPs rated medium risk (score: 40).
- 2 IPs rated low risk.
- Inherited Risk: 24 points (likely from subnet-level abuse).
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**5. Recommendations**
- Monitor Subnet: The 54.39.0.0/24 subnet has a high abuse density, suggesting potential for malicious activity.
- Verify DNS Activity: Investigate traffic to `proxy-ca004-san158.ahrefs.net` for unusual patterns.
- Check Hosting Provider: Confirm Ahrefs Pte Ltd’s infrastructure compliance and security posture.
- Segment Network: Consider isolating high-risk subnets to mitigate lateral movement risks.
Note: While the IP itself shows no direct malicious indicators, its association with a high-abuse subnet warrants closer 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-281059683 |
| CIDR Block | 54.39.0.0/24 |
| RIR | ARIN |
| Country | Singapore |
| Abuse Contact | — |
🌐 DNS Intelligence
| PTR | proxy-ca004-san158.ahrefs.net |
| Forward Confirmed | No — PTR hostname does not resolve back to this IP (weak signal) |
| Forward Hostnames | proxy-ca004-san158.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 | 30% | 2 | 4 |
| routing | 20% | 2 | 3 |
| services | 15% | 2 | 2 |
| ownership | 22% | 3 | 3 |
| reputation | 29% | 1 | 3 |
| geolocation | 26% | 2 | 2 |
| Overall | 24% | 12 | 17 |
| Data Coherence | Consistent (100%) |
| Attribution | Moderate (50%) |
| OwnershipFCrDNSGeo ConsensusGeo PlausibleIRR MatchRPKI Valid |
📅 Observation Timeline 🔄 Live
| First Seen | 2026-05-23 18:30:51 UTC |
| Last Seen | 2026-06-28 22:58:53 UTC |
| Profile Built | 2026-06-29 05:01:50 UTC |
| Data Freshness | Live |
| Signal Types | 24 |
| Total Observations | 26 |
Full dossier details are available via our API.