15.235.27.121
IP Intelligence Briefing: 15.235.27.121
Date: 2026-06-08
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**1. Core Profile**
- Risk Score: 25 (Low Risk)
- Ownership: Registered to Ahrefs Pte Ltd (OVH ASN 16276).
- Geolocation: Singapore (CA), but coordinates and timezone are unconfirmed.
- Network Role: Cloud compute infrastructure (OVH-hosted, no public services).
- Threat Indicators: No malicious activity detected (no blacklists, campaigns, or DNS threats).
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**2. Historical Observations**
- Recent Activity:
- DNS resolution for `proxy-ca013-san121.ahrefs.net` (likely internal/managed domain).
- Low-risk network classification (operator score: 0.2174, "Minimal" risk).
- No persistent threats or malicious campaigns linked.
- Trends: Stable risk profile with no significant changes over the past 30 days.
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**3. Relationships & Context**
- Key Associations:
- Linked to OVH-CUST-281059692 (same network).
- DNS hostname: `proxy-ca013-san121.ahrefs.net` (no email auth records).
- No connections to known threat actors, Tor, or malicious domains.
- Subnet Context:
- Part of 15.235.27.0/24 subnet.
- Abuse Density: 12.78% (moderate risk).
- Threat Neighbors: 29 IPs flagged as risky in the subnet.
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**4. Network Neighbors**
- Subnet Overview:
- Total IPs: 227 (29 flagged as risky).
- Active IPs: 49 (14.5% of subnet).
- Risk Distribution:
- 60% low risk, 40% medium risk.
- Notable Neighbors:
- 15.235.27.0 (risk score: 50), 15.235.27.1 (risk score: 25).
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**5. Recommendations**
- Monitor Subnet: The subnet has a moderate abuse density (12.78%) with 29 risky neighbors.
- Verify DNS: Confirm `proxy-ca013-san121.ahrefs.net` is a legitimate internal domain.
- Cloud Security: Ensure OVH-hosted infrastructure is configured with proper access controls and monitoring.
- No Immediate Action: No direct malicious indicators, but subnet-level risks warrant closer inspection.
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Source: IPDebrief Threat Intelligence Platform | *Generated for SOC Analysts*
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-281059692 |
| CIDR Block | 15.235.27.0/24 |
| RIR | ARIN |
| Country | Singapore |
| Abuse Contact | — |
🌐 DNS Intelligence
| PTR | proxy-ca013-san121.ahrefs.net |
| Forward Confirmed | No — PTR hostname does not resolve back to this IP (weak signal) |
| Forward Hostnames | proxy-ca013-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
| 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 | 33% | 2 | 3 |
| Overall | 24% | 10 | 15 |
| Data Coherence | Mostly Consistent (80%) — 1 contradiction(s) |
| Attribution | Low (35%) |
| OwnershipFCrDNSGeo ConsensusGeo PlausibleIRR MatchRPKI Valid |
📅 Observation Timeline 🔄 Live
| First Seen | 2026-05-18 09:23:34 UTC |
| Last Seen | 2026-06-28 06:52:50 UTC |
| Profile Built | 2026-06-29 00:56:54 UTC |
| Data Freshness | Live |
| Signal Types | 21 |
| Total Observations | 26 |
Full dossier details are available via our API.