51.222.168.95
# IP Intelligence Briefing: 51.222.168.95/32
## Executive Summary
IP 51.222.168.95 is hosted on OVH cloud infrastructure and resolves to the ahrefs.net domain with PTR proxy-ca018-san95.ahrefs.net. The IP presents a Moderate Risk profile (Risk Score: 40) with elevated contextual threat indicators from subnet abuse density and blacklist listings. Recommended action: Monitor with selective blocking pending correlation with active threat events.
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## Network Ownership & Infrastructure
| Attribute | Value |
|---|---|
| **Organization** | Dmytro, Ahrefs Pte Ltd |
| **ASN** | 16276 |
| **Network** | 51.222.168.0/24 |
| **Provider** | OVH |
| **Infrastructure Type** | CloudCompute / Hosting |
| **Registration** | RIR: ARIN |
---
## Geolocation & Validation
| Attribute | Value |
|---|---|
| **Reported Country** | Canada (CA) |
| **Reported Region** | Quebec |
| **Reported City** | Singapore |
| **Validation Status** | **FAILED** |
| **Distance Discrepancy** | 5,598 km with RTT violation |
| **Minimum Possible RTT** | 112ms |
| **Observed RTT** | 23ms |
*Note: Geographic data indicates location spoofing or misconfiguration. IP appears to be resolving to Singapore despite CA attribution.*
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## Threat Indicators
| Indicator | Status |
|---|---|
| **DNSBL Listings** | 8 lists, 1 active listing |
| **Max Severity** | High |
| **Known Attacker** | No |
| **Tor Exit Node** | No |
| **Spam Source** | No |
| **Campaign Activity** | None detected |
| **Threat Feeds** | Empty |
The IP has been listed on 8 DNS blacklist sources with 1 active listing of high severity. No specific threat indicators or campaign associations detected.
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## Subnet Context (51.222.168.0/24)
| Metric | Value |
|---|---|
| **Abuse Density** | 0.8203 (High Abuse) |
| **Total Siblings** | 256 |
| **Active Siblings** | 227 |
| **Threat Siblings** | 210 |
| **Subnet Classification** | high_abuse |
The /24 subnet exhibits high abuse density with 210 of 227 active siblings classified as threats. This contextual evidence warrants heightened monitoring despite the target IP's moderate standalone risk score.
---
## Network Services
| Service | Status |
|---|---|
| **Open Ports** | None detected |
| **HTTP Services** | None detected |
| **TLS Certificates** | None detected |
| **DNS Resolution** | Forward confirmed to proxy-ca018-san95.ahrefs.net |
| **Email Auth** | SPF/DMARC not configured |
No active services detected on the IP. The reverse DNS record indicates proxy infrastructure rather than direct web hosting.
---
## Observation History
Total Observations: 21
Key temporal signals:
- 2026-06-28: DNS blacklist listings with high severity
- 2026-06-20: Network classification confirmed as cloud/hosting infrastructure
- Consistent: DNSSEC validation enabled, CAA records present
No evidence of increasing threat persistence or emerging attack patterns.
---
## Recommended Actions
Immediate Mitigation
| Platform | Rule |
|---|---|
| **iptables** | `iptables -A INPUT -s 51.222.168.95 -j DROP` |
| **nftables** | `nft add rule inet filter input ip saddr 51.222.168.95 drop` |
| **nginx** | `deny 51.222.168.95;` |
| **pfSense** | `51.222.168.95/32` |
| **Cloudflare WAF** | Block IP with filter: `ip.src eq 51.222.168.95` |
| **AWS WAF** | Add address `51.222.168.95/32` to block list |
Strategic Recommendations
1. Block at perimeter given subnet abuse density and DNSBL listings
2. Monitor related IPs in 51.222.168.0/24 subnet for coordinated activity
3. Correlate with threat intelligence feeds for active campaign participation
4. Review email authentication records for any spoofing attempts from ahrefs.net subdomains
---
## Intelligence Assessment
This IP presents a contextual threat rather than active malicious behavior. The combination of:
- High subnet abuse density (0.8203)
- 210/227 threat siblings in /24
- Active DNSBL listings (8 lists)
- Geographic validation failures
...suggests compromised or misconfigured infrastructure within OVH's cloud environment. The ahrefs.net domain association indicates potential abuse of legitimate hosting infrastructure.
Threat Level: Moderate (40/100) with contextual escalation factors
Recommended Stance: Block at perimeter, monitor for activity, correlate with broader threat landscape
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-281059697 |
| CIDR Block | 51.222.168.0/24 |
| RIR | ARIN |
| Country | Singapore |
| Abuse Contact | — |
🌐 DNS Intelligence
| PTR | proxy-ca018-san95.ahrefs.net |
| Forward Confirmed | No — PTR hostname does not resolve back to this IP (weak signal) |
| Forward Hostnames | proxy-ca018-san95.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 | 40% | 2 | 3 |
| routing | 13% | 1 | 1 |
| services | 15% | 2 | 2 |
| ownership | 15% | 2 | 2 |
| reputation | 23% | 1 | 2 |
| geolocation | 34% | 2 | 3 |
| Overall | 23% | 10 | 13 |
| Data Coherence | Mostly Consistent (80%) — 1 contradiction(s) |
| Attribution | Low (35%) |
| OwnershipFCrDNSGeo ConsensusGeo PlausibleIRR MatchRPKI Valid |
📅 Observation Timeline 🔄 Live
| First Seen | 2026-05-24 00:33:08 UTC |
| Last Seen | 2026-06-28 23:28:33 UTC |
| Profile Built | 2026-06-29 05:30:14 UTC |
| Data Freshness | Live |
| Signal Types | 20 |
| Total Observations | 21 |
Full dossier details are available via our API.