51.161.37.229
IP Intelligence Dossier
Your IP: 216.73.216.123
🤖 Witness AIThis summary was generated by AI and may contain inaccuracies. Verify critical details independently.
IP Intelligence Briefing: 51.161.37.229
*Last Updated: 2026-06-18*
---
**1. Core Profile**
- Risk Score: 40 (Moderate Risk)
- Ownership: Registered to Ahrefs Pte Ltd (OVH ASN 16276), with CIDR block 51.161.37.0/24.
- Geolocation: Montreal, Canada (QC). Geolocation plausibility is invalid due to RTT anomalies (observed 27ms vs. expected 121.6ms for 6082km).
- Network Role: Cloud compute infrastructure (OVH-hosted, no public services exposed).
---
**2. Threat & Abuse Indicators**
- Threat Status: No direct malicious indicators (no blacklists, spam, or known attacker flags).
- Subnet Abuse: High abuse density (64.84%) in 51.161.37.0/24, with 166/256 sibling IPs flagged as threats.
- DNS: Linked to proxy hostname proxy-ca005-san229.ahrefs.net (ahrefs.net domain).
- Routing: BGP prefix 51.161.0.0/17; route stability is low (100% route changes in 30 days).
---
**3. Observation History**
- RTT Anomalies: Persistent low RTT (27ms) inconsistent with geographic distance, suggesting potential spoofing or CDN masking.
- DNSSEC/Caa: Valid DNSSEC, CAA records present.
- Ownership Stability: No ownership changes detected.
---
**4. Network Relationships**
- Linked Entities:
- OVH-CUST-281059684 (same network).
- ahrefs.net (DNS domain).
- Subnet Neighbors: 194 active IPs in 51.161.37.0/24, with 166 flagged as threats.
---
**5. Actionable Insights**
- Monitor Subnet: High abuse density in the subnet warrants closer scrutiny for lateral movement or compromised hosts.
- Verify Geolocation: Investigate RTT anomalies to confirm if the IP is spoofing location or using a CDN.
- Check DNS: Validate DNS records for ahrefs.net to ensure no typosquatting or phishing attempts.
- Firewall Rules: Consider blocking high-risk neighbors in the 51.161.37.0/24 subnet to mitigate potential lateral attacks.
---
Conclusion: While the IP itself is not malicious, its subnet exhibits high abuse density and geolocation inconsistencies. SOC teams should prioritize monitoring network traffic within this subnet and validate the IP’s true geographic origin.
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-281059684 |
| CIDR Block | 51.161.37.0/24 |
| RIR | ARIN |
| Country | Singapore |
| Abuse Contact | — |
🌐 DNS Intelligence
| PTR | proxy-ca005-san229.ahrefs.net |
| Forward Confirmed | No — PTR hostname does not resolve back to this IP (weak signal) |
| Forward Hostnames | proxy-ca005-san229.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
No certificate
Issued by —
N/A
| SANs | None |
| Valid From | — |
| Valid Until | — |
🎯 Confidence Breakdown
Per-dimension confidence scores based on source diversity and data freshness
| Dimension | Score | Sources | Observations |
|---|---|---|---|
| threat | 26% | 2 | 4 |
| routing | 13% | 1 | 1 |
| services | 12% | 2 | 2 |
| ownership | 19% | 2 | 2 |
| reputation | 31% | 1 | 3 |
| geolocation | 33% | 2 | 3 |
| Overall | 22% | 10 | 15 |
Coverage: 6/6 dimensions · Data sufficiency: sufficient
| Data Coherence | Mostly Consistent (80%) — 1 contradiction(s) |
| Attribution | Low (35%) |
| OwnershipFCrDNSGeo ConsensusGeo PlausibleIRR MatchRPKI Valid |
⚠ Claimed geolocation contradicts RTT physics measurement
📅 Observation Timeline 🔄 Live
| First Seen | 2026-05-07 23:04:25 UTC |
| Last Seen | 2026-06-27 06:14:52 UTC |
| Profile Built | 2026-06-28 00:21:47 UTC |
| Data Freshness | Live |
| Signal Types | 21 |
| Total Observations | 28 |
🔍 21 signal types · 28 observations collected
This report is generated from 21+ independent intelligence signals including
ownership records, DNS analysis, BGP routing, TLS certificates, port scanning, threat feeds,
behavioral fingerprinting, and more.
Full dossier details are available via our API.
Full dossier details are available via our API.
ℹ️ About This Report
All data shown is publicly available network metadata — IP addresses do not reliably identify individuals.
Assessments are probabilistic and should not be used as sole basis for access control decisions.
To report an issue or request data review, contact admin@ipdebrief.com.