15.235.98.155
# IPDEBRIEF THREAT INTELLIGENCE BRIEFING
## Target: 15.235.98.155/32
Executive Summary
IP 15.235.98.155 is a cloud-hosted infrastructure address associated with Ahrefs Pte Ltd, operating within OVH's hosting network. The IP presents moderate risk (score: 40) with no direct threat indicators detected. However, the address resides in a high-abuse density subnet (15.235.98.0/24) with 64% of active neighbors classified as threats, requiring contextual awareness during analysis.
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Ownership and Infrastructure
| Attribute | Value |
|---|---|
| Organization | Dmytro, Ahrefs Pte Ltd |
| ASN | 16276 (OVH) |
| CIDR Block | 15.235.98.0/24 |
| Infrastructure Type | CloudCompute / Hosting |
| Contact | Abuse contact not publicly available |
The IP is registered under OVH's customer network OVH-CUST-281059698 and operates as a hosted cloud infrastructure endpoint.
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Geolocation Analysis
| Attribute | Value |
|---|---|
| Reported Country | CA (Canada) |
| Coordinates | Singapore (56.13°N, -106.35°E) |
| RTT | 27ms |
| GeoConsensus | true |
| GeoPlausible | false |
NOTE: Geolocation data contains anomalies—reported country (Canada) conflicts with coordinate location (Singapore) with a distance violation of 6,082km against minimum possible RTT of 121.6ms. This discrepancy warrants verification during incident correlation.
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DNS and Network Services
| Attribute | Value |
|---|---|
| PTR Hostname | proxy-ca019-san155.ahrefs.net |
| Domain | ahrefs.net |
| Forward Resolution | Confirmed (1 record) |
| Open Ports | None detected |
| TLS Certificate | None |
| Service Status | Firewalled / No Services |
DNS resolution confirms association with ahrefs.net infrastructure. No active services or open ports detected—endpoint appears to be a backend or firewalled resource.
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Threat Indicators
| Indicator | Status |
|---|---|
| Reputation Score | 40 (Moderate Risk) |
| Is Tor Exit Node | No |
| Is Known Attacker | No |
| Is Spam Source | No |
| Blacklist Count | 0 |
| DNSBL Listed | 1 of 8 total lists |
| Known Campaigns | None |
| Threat Persistence | 0 days |
No direct threat indicators present. The single DNSBL listing may be legacy or non-malicious.
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Neighborhood Risk Assessment
Subnet: 15.235.98.0/24
| Metric | Value |
|---|---|
| Abuse Density | 0.7344 (High Abuse) |
| Inherited Risk | 29 |
| Total Siblings | 256 |
| Active Siblings | 246 |
| Threat Siblings | 188 |
| Risk Distribution | Medium: 100, High: 0, Low: 0 |
The subnet exhibits elevated abuse density (73.44%) with 188 of 246 active siblings flagged as threats. This contextual risk requires consideration during threat hunting, though the target IP itself shows no malicious activity.
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Observation History
Total Observations: 21
Recent signals include:
- 2026-06-28: DNS resolution for ahrefs.net (confidence: 80%)
- 2026-06-20: Provider classification as OVH hosting (confidence: 85%)
- 2026-06-20: Operator score assessment: Minimal (0.2174)
The IP shows persistent infrastructure presence with stable ownership characteristics. No threat-related observations detected in the history.
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Related Entities
Relationship Count: 37
All relationships map to the same network identifier (OVH-CUST-281059698), indicating infrastructure grouping within the provider's cloud environment. No external threat actor correlations identified.
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Recommended Actions
Current Status: No active firewall rules recommended.
Suggested Monitoring:
1. Monitor for service activation or port opens
2. Correlate with known Ahrefs infrastructure patterns
3. Track subnet-level abuse trends (15.235.98.0/24)
4. Verify geolocation consistency during incident analysis
Risk Rating: MODERATE (Contextual subnet risk elevated)
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*Report generated by IPDebrief Intelligence Platform*
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-281059698 |
| CIDR Block | 15.235.98.0/24 |
| RIR | ARIN |
| Country | Singapore |
| Abuse Contact | — |
🌐 DNS Intelligence
| PTR | proxy-ca019-san155.ahrefs.net |
| Forward Confirmed | No — PTR hostname does not resolve back to this IP (weak signal) |
| Forward Hostnames | proxy-ca019-san155.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 | 33% | 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 | 2026-05-23 12:22:10 UTC |
| Last Seen | 2026-06-28 21:14:53 UTC |
| Profile Built | 2026-06-29 15:20:03 UTC |
| Data Freshness | Live |
| Signal Types | 20 |
| Total Observations | 24 |
Full dossier details are available via our API.