51.81.110.51
IP Intelligence Briefing: 51.81.110.51/32
Observed reputation data assigned a Low Risk status with a risk score of 25. Ownership records attribute the address to OVH US LLC (ASN 16276) within the OUL-16 CIDR block. Network role analysis classified the infrastructure as CloudCompute hosting with no open ports detected. Reverse DNS resolution confirmed the address resolved to proxy-us-east004-cip4.ahrefs.net.
Threat actor classification labeled the host as Suspicious Host, though blacklists remained empty and abuse confidence was null. Behavioral logs recorded zero honeypot hits or enumeration strikes. Geolocation validation identified a contradiction where claimed US coordinates conflicted with RTT physics measurements, registering 23ms against a calculated minimum of 152.5ms for the distance. Control plane data showed valid RPKI state and IRR consistency.
The profile recommendation advised monitoring the address for changes due to signal contradictions, assigning a low severity rating. No specific firewall rules were generated based on the current data.
This summary was generated by AI and may contain inaccuracies. Verify critical details independently.
🏢 Ownership & Registration
| Organization | OVH US LLC |
| ASN | AS16276 |
| Network Name | OUL-16 |
| CIDR Block | 51.81.0.0/16 |
| RIR | ARIN |
| Country | United States |
| Abuse Contact | Available via RDAP |
🌐 DNS Intelligence
| PTR | proxy-us-east004-cip4.ahrefs.net |
| Forward Confirmed | Yes — FCrDNS verified |
| Forward Hostnames | proxy-us-east004-cip4.ahrefs.net |
🔐 DNS Hygiene
| Hygiene Score | 40% (Fair) |
| SPF | Not configured |
| DMARC | Not configured |
| FCrDNS | Verified |
| DNSSEC | Not signed |
| CAA | Present |
☁️ Network Classification
| Infrastructure | Infrastructure / Datacenter |
| Service Purpose | Firewalled / No Services |
| Network Tier | Tier 3 — Basic operator with some routing infrastructure |
🔌 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 | 35% | 2 | 2 |
| routing | 25% | 1 | 1 |
| services | 35% | 2 | 2 |
| ownership | 25% | 1 | 2 |
| reputation | 0% | 0 | 0 |
| geolocation | 35% | 2 | 2 |
| Overall | 25% | 8 | 9 |
| Data Coherence | Mostly Consistent (80%) — 1 contradiction(s) |
| Attribution | High (85%) |
| OwnershipFCrDNSGeo ConsensusGeo PlausibleIRR MatchRPKI Valid |
📅 Observation Timeline 🔄 Live
| First Seen | 2026-09-07 10:22:18 UTC |
| Last Seen | 2026-09-23 07:50:31 UTC |
| Profile Built | 2026-09-21 09:19:54 UTC |
| Data Freshness | Live |
| Signal Types | 31 |
| Total Observations | 32 |
Full dossier details are available via our API.