54.39.0.133
IP Intelligence Briefing: 54.39.0.133
*Generated via IPDebrief Threat Intelligence Network*
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**Core Profile**
- Risk Score: 50 (Moderate Risk)
- Ownership: Owned by OVH (ASN 16276) under Dmytro, Ahrefs Pte Ltd.
- Geolocation:
- Country: Canada (QC, Beauharnois)
- Geo Plausibility: False (RTT anomaly: 26ms vs. expected 112.6ms for 5629km).
- Network Role: CloudCompute (OVH customer, no residential/mobile indicators).
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**Threat Indicators**
- No direct malicious signals: No known attacker, spam, or blacklist associations.
- DNS: Resolves to `proxy-ca004-san133.ahrefs.net` (linked to Ahrefs, a legitimate SEO tool provider).
- Subnet Abuse:
- 54.39.0.0/24 has 0.564 abuse density (high_abuse classification).
- 141/250 siblings flagged as threats; 135 active in subnet.
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**Observation History**
- 19 observations over 30 days:
- Stability: Unstable routing (route changes detected).
- Geo Validation: Persistent RTT discrepancy (26ms vs. expected 112.6ms).
- Control Plane: DNSSEC valid, CAA records present, but 2 DNSBL listings.
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**Network Relationships**
- Same Network: Linked to OVH-CUST-281059683 (customer network).
- Neighbors:
- 100 IPs in 54.39.0.0/24 subnet.
- 89 low/medium risk, 11 high risk (abuse density: 0.564).
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**Actionable Insights**
1. Geolocation Anomaly: The IP’s low RTT (~26ms) contradicts its claimed location in Canada. Investigate potential spoofing, proxy, or CDN usage.
2. Subnet Risk: High abuse density in the subnet (0.564) suggests environmental risk. Monitor for lateral movement or shared infrastructure compromises.
3. DNS Context: Ahrefs’ domain is legitimate, but ensure no malicious subdomains or misconfigurations are associated.
4. Cloud Compute: OVH-hosted instance; check for unauthorized cloud resource usage or misconfigured security groups.
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Recommended Actions:
- Block IP in firewall (e.g., `iptables -A INPUT -s 54.39.0.133 -j DROP`).
- Monitor subnet for additional threats (use IPDebrief neighbors for targeting).
- Validate DNS resolution and check for Ahrefs-related security advisories.
*Generated from IPDebrief full profile, history, relationships, and subnet analysis.*
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-san133.ahrefs.net |
| Forward Confirmed | No — PTR hostname does not resolve back to this IP (weak signal) |
| Forward Hostnames | proxy-ca004-san133.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 | 3 |
| routing | 13% | 1 | 1 |
| services | 12% | 2 | 2 |
| ownership | 15% | 2 | 2 |
| reputation | 22% | 1 | 2 |
| geolocation | 37% | 2 | 3 |
| Overall | 21% | 10 | 13 |
| Data Coherence | Mostly Consistent (80%) — 1 contradiction(s) |
| Attribution | Low (35%) |
| OwnershipFCrDNSGeo ConsensusGeo PlausibleIRR MatchRPKI Valid |
📅 Observation Timeline 🔄 Live
| First Seen | 2026-05-11 02:51:44 UTC |
| Last Seen | 2026-06-27 18:56:55 UTC |
| Profile Built | 2026-06-28 13:03:29 UTC |
| Data Freshness | Live |
| Signal Types | 20 |
| Total Observations | 25 |
Full dossier details are available via our API.