## IP INTELLIGENCE BRIEFING: 51.195.215.55/32
Classification: Moderate Risk | Risk Score: 50/100
---
EXECUTIVE SUMMARY
IP 51.195.215.55 is a cloud-hosted infrastructure address located in London, GB, operating under OVH (ASN 16276). The IP resolves to the Ahrefs.net domain (proxy-uk009-san55.ahrefs.net) and is classified as hosting infrastructure with no currently open services. While the address itself shows no direct threat indicators, the parent subnet exhibits elevated abuse activity requiring contextual awareness.
---
OWNERSHIP & INFRASTRUCTURE
- Provider: OVH Cloud (ASN 16276)
- Organization: Ahrefs Pte Ltd Dmytro
- Geolocation: London, England, GB (Europe/London timezone)
- Network Role: CloudCompute/Hosting
- DNS Records: proxy-uk009-san55.ahrefs.net (forward confirmed)
- Infrastructure Type: Cloud-hosted with firewalled/no active services
---
THREAT ASSESSMENT
Current Status: No direct threat indicators identified
- Threat Indicators: None detected
- Known Attacker: No
- Spam Source: No
- Tor Exit Node: No
- Blacklist Count: 0 direct blacklists
- DNSBL Listed: 2 of 8 total lists
Control Plane Observations:
- DNSSEC: Valid
- RPKI State: Not evaluated
- Route Stability: Not stable
- Operator Score: 0.2174 (Minimal)
---
SUBNET CONTEXT & NEIGHBORHOOD ANALYSIS
The parent subnet 51.195.215.0/24 demonstrates elevated abuse characteristics:
- Abuse Density: 78.91% (High Abuse Classification)
- Subnet Size: 256 IPs total
- Active Siblings: 199
- Threat Siblings: 202
- Inherited Risk Score: 31
Neighboring IP analysis shows consistent risk profiles across the /24 range, with 100 neighbors assessed at medium risk (score: 40). This suggests systematic infrastructure deployment rather than isolated malicious activity.
---
OBSERVATION HISTORY
- Total Observations: 21 signals
- Most Recent: 2026-06-20
- Threat Persistence Days: 0
- Ownership Changes: 0
- Persistent Malicious Activity: False
Observation timeline indicates stable operational patterns with no escalation in threat signals over the monitoring period.
---
RELATIONSHIP MAPPING
- Total Relationships: 38 entities
- Primary Association: Same Network (OVH_282347345)
- Network Classification: Consistent OVH infrastructure linkage
---
RECOMMENDED ACTIONS
Immediate Mitigation (if blocking is warranted):
```bash
# iptables
iptables -A INPUT -s 51.195.215.55 -j DROP
# nftables
nft add rule inet filter input ip saddr 51.195.215.55 drop
# Cloudflare WAF
action: block
filter: ip.src eq 51.195.215.55
# AWS WAF
Addresses: 51.195.215.55/32
Description: IPDebrief risk 50
```
Strategic Considerations:
1. Monitor subnet 51.195.215.0/24 for coordinated abuse patterns
2. Ahrefs.net is a legitimate SEO tool provider; false positive risk exists
3. No active services detectedβmay be dormant or backend infrastructure
4. DNSBL listings suggest reputation degradation without current malicious activity
---
ANALYST NOTE: This IP represents legitimate cloud infrastructure within a high-abuse-density subnet. Direct threat indicators are absent, but contextual awareness of subnet-level abuse patterns is recommended for threat hunting operations.
This summary was generated by AI and may contain inaccuracies. Verify critical details independently.
π’ Ownership & Registration
| Organization | Ahrefs Pte Ltd Dmytro |
| ASN | AS16276 |
| Network Name | β |
| CIDR Block | β |
| RIR | ARIN |
| Country | β |
| Abuse Contact | Available via RDAP |
π DNS Intelligence
| PTR | proxy-uk009-san55.ahrefs.net |
| Forward Confirmed | No β PTR hostname does not resolve back to this IP (weak signal) |
| Forward Hostnames | proxy-uk009-san55.ahrefs.net |
π DNS Hygiene
| Hygiene Score | 40% (Fair) |
| SPF | Not configured |
| DMARC | Not configured |
| FCrDNS | Not verified |
| DNSSEC | Valid |
| CAA | Present |
βοΈ Network Classification
| Infrastructure | Infrastructure / Datacenter |
| Service Purpose | Firewalled / No Services |
| Network Tier | Hosting β Infrastructure provider without advanced routing |
π 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 | β |
| HTTP Title | β |
π TLS Certificate
| SANs | None |
| Valid From | β |
| Valid Until | β |
π― Confidence Breakdown
Per-dimension confidence scores based on source diversity and data freshness
| Dimension | Score | Sources | Observations |
|---|---|---|---|
| threat | 36% | 2 | 4 |
| routing | 13% | 1 | 1 |
| services | 15% | 2 | 2 |
| ownership | 24% | 2 | 3 |
| reputation | 31% | 1 | 3 |
| geolocation | 39% | 2 | 3 |
| Overall | 26% | 10 | 16 |
| Data Coherence | Consistent (100%) |
| Attribution | Moderate (50%) |
| OwnershipFCrDNSGeo ConsensusGeo PlausibleIRR MatchRPKI Valid |
π Observation Timeline π Live
| First Seen | 2026-05-22 03:10:13 UTC |
| Last Seen | 2026-06-28 17:45:25 UTC |
| Profile Built | 2026-06-29 05:48:24 UTC |
| Data Freshness | Live |
| Signal Types | 22 |
| Total Observations | 26 |
Full dossier details are available via our API.