51.89.129.139
IP Intelligence Briefing: 51.89.129.139
*Generated via IPDebrief Threat Intelligence Platform*
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**1. Core Profile**
- Risk Score: 25 (Low Risk)
- Ownership: Owned by Ahrefs Pte Ltd (ASN 16276)
- Geolocation: London, England, GB (consistent with OVH infrastructure)
- Network Role: Cloud compute instance (OVH provider), no CDN/VPN/Tor indicators
- Threat Indicators: No malicious activity detected (no abuse reports, spam, or known campaigns)
- DNS: Linked to `proxy-uk008-san139.ahrefs.net` (legitimate Ahrefs subdomain)
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**2. Observation History**
- Stability: Minimal fluctuations in risk scores (0–25) over 17 observations
- Key Signals:
- Network Stability: Stable routing (no recent route changes)
- Geolocation: Consistent UK location (750km accuracy radius)
- DNS: No misconfigurations or spoofing detected
- Trend: No upward risk trajectory; IP remains low-risk.
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**3. Network Relationships**
- Subnet: 51.89.129.139/24
- Neighbors:
- 100 active IPs in subnet (256 total)
- Abuse Density: 46% (moderate risk in subnet)
- Threat Siblings: 118 IPs flagged as risky
- Connections:
- Directly linked to OVH network (ASN 16276)
- DNS associations with Ahrefs infrastructure
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**4. Threat Context**
- No Malicious Activity: No indicators of compromise (IOC), spam, or phishing.
- Subnet Risk: While the IP itself is low-risk, the subnet contains a significant portion of risky IPs (46% abuse density).
- Provider Context: OVH is a legitimate cloud provider, but shared hosting environments may host both benign and malicious actors.
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**5. Recommendations**
- Monitor Subnet: Track emerging threats in the 51.89.129.0/24 subnet due to moderate abuse density.
- Verify DNS: Confirm that Ahrefs’ DNS configurations are secure (no misconfigured CAA/SPF).
- Baseline Behavior: No immediate action required for this IP, but maintain visibility for anomalies.
Final Assessment: 51.89.129.139 is a legitimate cloud compute instance with no malicious indicators. However, its subnet contains a notable risk presence, warranting closer monitoring.
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*Generated by IPDebrief | Threat Intelligence for SOC Teams*
This summary was generated by AI and may contain inaccuracies. Verify critical details independently.
🏢 Ownership & Registration
| Organization | Ahrefs Pte Ltd Dmytro |
| ASN | AS16276 |
| Network Name | — |
| CIDR Block | — |
| RIR | ARIN |
| Country | — |
| Abuse Contact | Available via RDAP |
🌐 DNS Intelligence
| PTR | proxy-uk008-san139.ahrefs.net |
| Forward Confirmed | No — PTR hostname does not resolve back to this IP (weak signal) |
| Forward Hostnames | proxy-uk008-san139.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 | 39% | 2 | 3 |
| routing | 13% | 1 | 1 |
| services | 21% | 2 | 2 |
| ownership | 24% | 2 | 3 |
| reputation | 31% | 1 | 3 |
| geolocation | 33% | 2 | 3 |
| Overall | 27% | 10 | 15 |
| Data Coherence | Consistent (100%) |
| Attribution | Moderate (50%) |
| OwnershipFCrDNSGeo ConsensusGeo PlausibleIRR MatchRPKI Valid |
📅 Observation Timeline 🔄 Live
| First Seen | 2026-05-18 03:23:26 UTC |
| Last Seen | 2026-06-28 06:42:09 UTC |
| Profile Built | 2026-06-29 00:46:38 UTC |
| Data Freshness | Live |
| Signal Types | 20 |
| Total Observations | 25 |
Full dossier details are available via our API.