54.39.136.121
IP Intelligence Dossier
Your IP: 216.73.216.123
🤖 Witness AIThis summary was generated by AI and may contain inaccuracies. Verify critical details independently.
IP Intelligence Briefing: 54.39.136.121
Date: 2026-06-15
---
**1. Core Profile**
- Risk Score: 40 (Moderate Risk)
- Provider: OVH (AS16276)
- Organization: Ahrefs Pte Ltd (registered with ARIN)
- Geolocation: Quebec, Canada (Beauharnois, 45.3161°N, -73.8736°E)
- Network Role: Cloud compute infrastructure (OVH hosting)
- Subnet: 54.39.136.0/24 (abuse density: 55.86%)
---
**2. Threat & Security Indicators**
- Malicious Activity: No detected indicators (no blacklists, spam, or campaigns).
- DNS: Resolves to `proxy-ca002-san121.ahrefs.net` (no email auth records).
- Services: No open ports or TLS certificates detected.
- BGP: Route stable (no recent changes), RPKI valid, DNSSEC enabled.
---
**3. Network Relationships**
- Linked Entities:
- Subnet: `54.39.136.0/24` (OVH-CUST-281059681)
- Organization: Ahrefs Pte Ltd (OVH customer)
- Hostnames: `proxy-ca002-san121.ahrefs.net`
- Connections: 42 relationships (primarily same-network links).
---
**4. Subnet Analysis**
- Neighbor Risk:
- 89 IPs with medium risk (40–60 score), 11 with low risk.
- Subnet abuse density: 55.86% (classified as *high_abuse*).
- Notable Neighbors:
- `54.39.136.0` (risk 50), `54.39.136.1` (risk 40), etc.
- Inherited Risk: 22 (likely from subnet-level abuse).
---
**5. Temporal Observations**
- Historical Signals:
- Stable reputation (minimal risk) since 2026-06-09.
- No persistent malicious activity or ownership changes.
- Geolocation Consistency: Plausible Canadian origin (Beauharnois).
---
**6. Recommendations**
- Monitor Subnet: The 54.39.136.0/24 subnet has high abuse density. Investigate neighboring IPs for potential compromises.
- Verify Ownership: Confirm Ahrefs Pte Ltd’s use of this IP, as OVH customers may host mixed-use infrastructure.
- Traffic Filtering: Consider rate-limiting or blocking traffic from high-risk neighbors if this IP is part of a sensitive network.
- DNS Monitoring: Track DNS resolutions to `proxy-ca002-san121.ahrefs.net` for unusual activity.
---
Note: No direct threats detected, but subnet-level risks suggest contextual 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-281059681 |
| CIDR Block | 54.39.136.0/24 |
| RIR | ARIN |
| Country | Singapore |
| Abuse Contact | — |
🌐 DNS Intelligence
| PTR | proxy-ca002-san121.ahrefs.net |
| Forward Confirmed | No — PTR hostname does not resolve back to this IP (weak signal) |
| Forward Hostnames | proxy-ca002-san121.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
No certificate
Issued by —
N/A
| SANs | None |
| Valid From | — |
| Valid Until | — |
🎯 Confidence Breakdown
Per-dimension confidence scores based on source diversity and data freshness
| Dimension | Score | Sources | Observations |
|---|---|---|---|
| threat | 31% | 2 | 4 |
| routing | 13% | 1 | 1 |
| services | 15% | 2 | 2 |
| ownership | 19% | 2 | 2 |
| reputation | 31% | 1 | 3 |
| geolocation | 25% | 2 | 2 |
| Overall | 22% | 10 | 14 |
Coverage: 6/6 dimensions · Data sufficiency: sufficient
| Data Coherence | Consistent (100%) |
| Attribution | Moderate (50%) |
| OwnershipFCrDNSGeo ConsensusGeo PlausibleIRR MatchRPKI Valid |
📅 Observation Timeline 🔄 Live
| First Seen | 2026-05-21 14:58:04 UTC |
| Last Seen | 2026-06-28 14:36:46 UTC |
| Profile Built | 2026-06-29 02:40:51 UTC |
| Data Freshness | Live |
| Signal Types | 20 |
| Total Observations | 22 |
🔍 20 signal types · 22 observations collected
This report is generated from 20+ independent intelligence signals including
ownership records, DNS analysis, BGP routing, TLS certificates, port scanning, threat feeds,
behavioral fingerprinting, and more.
Full dossier details are available via our API.
Full dossier details are available via our API.
ℹ️ About This Report
All data shown is publicly available network metadata — IP addresses do not reliably identify individuals.
Assessments are probabilistic and should not be used as sole basis for access control decisions.
To report an issue or request data review, contact admin@ipdebrief.com.