54.39.136.31
IP Intelligence Briefing: 54.39.136.31
Date: 2026-06-14
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**1. Risk Profile**
- Risk Score: 40 (Moderate Risk)
- Ownership: Owned by Dmytro, Ahrefs Pte Ltd (OVH network, ASN 16276).
- Geolocation: Canada (QC, Beauharnois), inferred with 3000km accuracy.
- Threat Indicators: No malicious activity detected (no indicators, blacklist entries, or campaigns).
- Network Role: CloudCompute infrastructure (OVH-hosted, no residential/mobile traffic).
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**2. Observation History**
- Recent Activity:
- Consistent geolocation in Canada (June 5–14, 2026).
- DNS resolution to ahrefs.net (legitimate domain, no abuse detected).
- Subnet abuse density: 52.21% (high_abuse classification).
- Stability: Stable network with minimal ownership changes.
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**3. Relationships & Neighbors**
- Network Relationships:
- Linked to OVH-CUST-281059681 (same network).
- Subnet: 54.39.136.0/24 (249 total IPs, 130 flagged as threats).
- Neighbor Risk:
- Subnet abuse density: 52.21% (high risk).
- 121 active IPs, 130 threat-siblings (moderate risk distribution).
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**4. Security Actions**
- Recommended Mitigations:
- Block IP: Standard firewall rules (iptables, nftables, AWS WAF, etc.) provided.
- Monitor Subnet: High abuse density in 54.39.136.0/24 warrants closer scrutiny.
- Verify DNS: Ensure no DNS-based threats (e.g., CAA, DNSSEC compliance).
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**5. Summary**
This IP is associated with a legitimate hosting provider (OVH) and has no direct malicious indicators. However, its subnet exhibits high abuse density, suggesting potential for lateral movement or compromised hosts. SOC teams should:
1. Block the IP to prevent potential threats.
2. Monitor the 54.39.136.0/24 subnet for unusual activity.
3. Validate DNS configurations and ensure alignment with Ahrefs’ security practices.
Next Steps: Correlate with internal threat feeds and assess subnet-wide risks.
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-san31.ahrefs.net |
| Forward Confirmed | No — PTR hostname does not resolve back to this IP (weak signal) |
| Forward Hostnames | proxy-ca002-san31.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 | 15% | 2 | 2 |
| ownership | 15% | 2 | 2 |
| reputation | 28% | 1 | 3 |
| geolocation | 25% | 2 | 2 |
| Overall | 21% | 10 | 14 |
| Data Coherence | Consistent (100%) |
| Attribution | Moderate (50%) |
| OwnershipFCrDNSGeo ConsensusGeo PlausibleIRR MatchRPKI Valid |
📅 Observation Timeline 🔄 Live
| First Seen | 2026-05-10 22:17:54 UTC |
| Last Seen | 2026-06-27 18:39:38 UTC |
| Profile Built | 2026-06-28 12:47:19 UTC |
| Data Freshness | Live |
| Signal Types | 20 |
| Total Observations | 25 |
Full dossier details are available via our API.