54.39.0.191
IP Intelligence Briefing: 54.39.0.191
*Generated via IPDebrief tools (June 14, 2026)*
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**Core Profile**
- Risk Score: 40 (Moderate Risk)
- Ownership: Registered to Ahrefs Pte Ltd (OVH ASN 16276)
- Geolocation: Canada (QC, Beauharnois) – Geo Plausibility: False (RTT anomalies suggest potential spoofing)
- Network Role: Cloud compute instance (OVH) – Hosting environment with no open services detected.
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**Threat Indicators**
- No direct malicious indicators (no malware, phishing, or exploit activity).
- Subnet Risk Context:
- 54.39.0.0/24 classified as high_abuse (abuse density: 63.92%).
- 163 threat siblings in subnet (100% of neighbors analyzed).
- Inherited risk: 25 (substantial exposure due to subnet activity).
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**Relationships & Network Context**
- Linked to:
- OVH-CUST-281059683 (same network).
- ahrefs.net (DNS: `proxy-ca004-san191.ahrefs.net`).
- DNS:
- PTR record resolves to `proxy-ca004-san191.ahrefs.net`.
- No email authentication (SPF/DKIM) detected.
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**Observation History**
- Recent activity:
- Subnet abuse density tracked since June 14, 2026.
- DNSSEC validity: True; CAA records present.
- BGP: Route stability flagged (unstable route changes).
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**Recommended Actions**
1. Monitor subnet 54.39.0.0/24 for lateral movement or amplification attacks.
2. Block outbound traffic from this subnet unless explicitly authorized.
3. Verify DNS configurations for `ahrefs.net` to ensure no spoofing.
4. Review cloud instance security (OVH) for misconfigurations.
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*Note: This IP is part of a high-risk subnet. While no direct threats are detected, the network context warrants close monitoring.*
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-san191.ahrefs.net |
| Forward Confirmed | No — PTR hostname does not resolve back to this IP (weak signal) |
| Forward Hostnames | proxy-ca004-san191.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 | 35% | 2 | 3 |
| Overall | 21% | 10 | 15 |
| Data Coherence | Mostly Consistent (80%) — 1 contradiction(s) |
| Attribution | Low (35%) |
| OwnershipFCrDNSGeo ConsensusGeo PlausibleIRR MatchRPKI Valid |
📅 Observation Timeline 🔄 Live
| First Seen | 2026-05-07 23:04:28 UTC |
| Last Seen | 2026-06-27 08:00:52 UTC |
| Profile Built | 2026-06-28 02:07:46 UTC |
| Data Freshness | Live |
| Signal Types | 22 |
| Total Observations | 28 |
Full dossier details are available via our API.