51.222.168.136
Threat Intelligence Briefing: IP 51.222.168.136/32
IP Address: 51.222.168.136/32
Entity: Amazon AWS
Location: Ireland (Dublin)
Provider: Amazon Web Services (AWS)
ASN: AS16276 (OVH SAS)
Network Role: Cloud Compute (Hosting)
Geolocation:
- Country: Canada (QC, Montreal)
- Latitude/Longitude: Unavailable
- Geo Validation: Plausible? No (RTT discrepancy for distance)
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Key Findings:
1. Ownership & Infrastructure:
- Owned by OVH SAS (AS16276), associated with Ahrefs Pte Ltd.
- Hosted on AWS infrastructure, classified as a cloud compute node.
- No direct malicious indicators (no malware, spam, or phishing detected).
2. Threat Profile:
- Risk Score: Low (25/100)
- Abuse Density: 0.488 (moderate risk in subnet)
- Neighbor Analysis: 250 IPs in subnet (51.222.168.0/24), 122 flagged as threats.
- DNS: Resolves to `proxy-ca018-san136.ahrefs.net` (no email auth records).
3. Network Behavior:
- BGP: Stable route with no recent changes.
- DNSSEC: Validated.
- Subnet Risk: 19 inherited risks from neighbors; 193 active IPs.
4. Temporal Trends:
- Observed once in the last 30 days (June 3, 2026).
- No persistent malicious activity detected.
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Actionable Recommendations:
- Monitor Subnet: The subnet (51.222.168.0/24) has a moderate abuse density. Investigate high-risk neighbors (122 flagged IPs).
- Verify Geolocation: Discrepancy between reported location (Canada) and AWS infrastructure (Ireland) may indicate misconfigured geolocation data.
- Check Ahrefsε ³θ: Ahrefs Pte Ltdβs domain (`ahrefs.net`) should be reviewed for security posture, given its association with this IP.
- Firewall Rules: Consider allowing traffic to this IP if itβs a legitimate cloud service, but restrict unnecessary ports/services.
Conclusion:
The IP is currently low risk but resides in a subnet with moderate abuse density. Monitor for unusual activity and validate geolocation anomalies. No immediate threat detected, but subnet-level risks warrant further investigation.
This summary was generated by AI and may contain inaccuracies. Verify critical details independently.
π’ 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 | β |
π DNS Intelligence
| PTR | proxy-ca018-san136.ahrefs.net |
| Forward Confirmed | No β PTR hostname does not resolve back to this IP (weak signal) |
| Forward Hostnames | proxy-ca018-san136.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 | 24% | 2 | 4 |
| routing | 13% | 1 | 1 |
| services | 12% | 2 | 2 |
| ownership | 15% | 2 | 2 |
| reputation | 28% | 1 | 3 |
| geolocation | 32% | 2 | 3 |
| Overall | 21% | 10 | 15 |
| Data Coherence | Mostly Consistent (80%) β 1 contradiction(s) |
| Attribution | Low (35%) |
| OwnershipFCrDNSGeo ConsensusGeo PlausibleIRR MatchRPKI Valid |
π Observation Timeline π Live
| First Seen | 2026-05-07 23:04:26 UTC |
| Last Seen | 2026-06-27 06:49:34 UTC |
| Profile Built | 2026-06-28 00:55:59 UTC |
| Data Freshness | Live |
| Signal Types | 21 |
| Total Observations | 28 |
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