54.39.6.193
# IP Intelligence Briefing: 54.39.6.193/32
Date: 2026-06-25
Classification: Moderate Risk
Analyst: SOC Intelligence Unit
---
## Executive Summary
IP address 54.39.6.193 is assigned to OVH Cloud infrastructure (ASN 16276) and resolves to ahosting domain (ahrefs.net). The IP exhibits moderate risk (score: 40) with elevated neighborhood-level abuse density (0.6602). Recommended action: Block at perimeter firewall and WAF layers.
---
## Infrastructure Profile
| Attribute | Value |
|---|---|
| **IP Address** | 54.39.6.193/32 |
| **Risk Score** | 40 (Moderate Risk) |
| **ASN** | 16276 |
| **Organization** | Dmytro, Ahrefs Pte Ltd |
| **Netname** | OVH-CUST-281059680 |
| **Geolocation** | Beauharnois, QC, Canada |
| **Infrastructure Type** | Cloud Compute (OVH) |
| **DNS PTR** | proxy-ca001-san193.ahrefs.net |
| **Domain** | ahrefs.net |
---
## Threat Indicators
- Blacklist Count: 0 (direct)
- DNSBL Listed: 1 of 8 total lists
- Known Campaigns: None identified
- Tor Exit Node: No
- Known Attacker: No
- Spam Source: No
- Operator Score: 0.2174 (Minimal)
- Route Stability: Unstable (isRouteStable: false)
---
## Neighborhood Analysis (54.39.6.0/24)
| Metric | Value |
|---|---|
| **Abuse Density** | 0.6602 (High) |
| **Classification** | High Abuse |
| **Inherited Risk** | 26 |
| **Total Siblings** | 256 |
| **Active Siblings** | 182 |
| **Threat Siblings** | 169 |
*Note: 169 of 256 IPs in the /24 subnet show threat indicators, indicating concentrated abuse within this cloud customer block.*
---
## Observation History
- Total Observations: 20 signals
- Latest Signal: 2026-06-25T03:41:44 UTC
- Consistency: Consistent cloud/hosting classification
- Threat Persistence: 0 days (transient threat)
- Ownership Changes: 0
---
## Security Recommendations
Immediate Actions
| Platform | Rule |
|---|---|
| **iptables** | `iptables -A INPUT -s 54.39.6.193 -j DROP` |
| **nftables** | `nft add rule inet filter input ip saddr 54.39.6.193 drop` |
| **nginx** | `deny 54.39.6.193;` |
| **pfSense** | `54.39.6.193/32` |
| **Cloudflare WAF** | Block IP (risk score 40) |
| **AWS WAF** | `Addresses: ["54.39.6.193/32"]` |
---
## Threat Assessment
The IP 54.39.6.193 operates within a high-abuse-density OVH customer subnet (OVH-CUST-281059680). The 66% abuse density in the /24 neighborhood suggests either:
1. Shared infrastructure abuse (compromised cloud customer)
2. Legitimate services with high traffic volume triggering false positives
Given the DNS resolution to ahrefs.net (a legitimate SEO analytics service), the threat is likely opportunistic rather than targeted. However, the elevated neighborhood risk warrants defensive blocking at the perimeter.
---
## SOC Analyst Notes
- Monitor for similar IPs from 54.39.6.0/24 subnet
- Review DNS logs for ahrefs.net domain activity
- Consider subnet-level blocking if abuse persists from this /24
- No immediate campaign correlation identified
*Report generated: 2026-06-25*
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-281059680 |
| CIDR Block | 54.39.6.0/24 |
| RIR | ARIN |
| Country | Singapore |
| Abuse Contact | — |
🌐 DNS Intelligence
| PTR | proxy-ca001-san193.ahrefs.net |
| Forward Confirmed | No — PTR hostname does not resolve back to this IP (weak signal) |
| Forward Hostnames | proxy-ca001-san193.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 | |||
| 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 | 3 |
| routing | 13% | 1 | 1 |
| services | 8% | 1 | 1 |
| ownership | 19% | 2 | 2 |
| reputation | 28% | 1 | 3 |
| geolocation | 21% | 2 | 2 |
| Overall | 20% | 9 | 12 |
| Data Coherence | Consistent (100%) |
| Attribution | Moderate (50%) |
| OwnershipFCrDNSGeo ConsensusGeo PlausibleIRR MatchRPKI Valid |
📅 Observation Timeline 🔄 Live
| First Seen | 2026-05-08 05:02:26 UTC |
| Last Seen | 2026-06-27 12:50:56 UTC |
| Profile Built | 2026-06-28 06:56:14 UTC |
| Data Freshness | Live |
| Signal Types | 19 |
| Total Observations | 25 |
Full dossier details are available via our API.