51.161.37.156
IP Intelligence Briefing: 51.161.37.156
*Generated via IPDebrief Analysis*
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1. Core Profile
- Risk Score: 25 (Low Risk)
- Ownership: Owned by OVH (ASN 16276) under Dmytro, Ahrefs Pte Ltd.
- Geolocation:
- Primary: New York, US (via MaxMind)
- Secondary: Singapore (via ARIN registration).
- Network Role:
- CloudCompute infrastructure (OVH-hosted).
- No exposed services (open ports: none).
- DNS: Resolves to `proxy-ca005-san156.ahrefs.net`.
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2. Threat & Behavior
- Threat Indicators:
- No malicious indicators (no blacklists, campaigns, or known attacker tags).
- DNSBL Listing: Listed in 1 of 8 DNSBLs (low severity).
- Historical Observations:
- 14 records over time, showing mixed geolocation data (Canada/Singapore).
- Stable ownership (no recent changes).
- Behavioral Flags:
- No honeypot hits or enumeration activity.
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3. Relationships & Network Context
- Linked Entities:
- Subnet: 51.161.37.0/24 (OVH-CUST-281059684).
- DNS: Associated with `proxy-ca005-san156.ahrefs.net` (Ahrefs, SEO tools).
- Subnet Analysis:
- 100 IPs in /24 range.
- Abuse Density: 0% (no malicious activity detected).
- Risk Distribution: 79 medium-risk, 21 low-risk IPs.
- Neighbors: 79 IPs with medium risk, 21 with low risk.
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4. Recommendations
- Monitoring: Track subnet for anomalies due to mixed geolocation data.
- DNS: Verify `proxy-ca005-san156.ahrefs.net` for potential misconfiguration.
- Firewall: No immediate action required due to low risk, but consider rate-limiting or monitoring for unexpected traffic.
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*End of Briefing*
*Generated from IPDebrief data. No action required unless further anomalies detected.*
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-san156.ahrefs.net |
| Forward Confirmed | No — PTR hostname does not resolve back to this IP (weak signal) |
| Forward Hostnames | proxy-ca005-san156.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 | 21% | 2 | 2 |
| routing | 13% | 1 | 1 |
| services | 13% | 1 | 1 |
| ownership | 19% | 2 | 2 |
| reputation | 17% | 1 | 2 |
| geolocation | 30% | 2 | 3 |
| Overall | 19% | 9 | 11 |
| Data Coherence | Mostly Consistent (80%) — 1 contradiction(s) |
| Attribution | Low (35%) |
| OwnershipFCrDNSGeo ConsensusGeo PlausibleIRR MatchRPKI Valid |
📅 Observation Timeline 🔄 Live
| First Seen | 2026-06-06 01:24:31 UTC |
| Last Seen | 2026-06-21 12:48:44 UTC |
| Profile Built | 2026-06-21 13:12:05 UTC |
| Data Freshness | Live |
| Signal Types | 21 |
| Total Observations | 23 |
Full dossier details are available via our API.