51.161.37.240📋 Copy

# IP INTELLIGENCE BRIEFING: 51.161.37.240/32

Classification: Moderate Risk | Status: Active Monitoring Required | Report Date: 2026-06-29

---

## EXECUTIVE SUMMARY

IP 51.161.37.240 is a cloud computing endpoint operating under OVH infrastructure (ASN 16276) with an Ahrefs corporate association. The IP presents a moderate risk profile (Score: 50) but operates within a subnet exhibiting significant abuse density. Geolocation data shows notable inconsistencies that warrant validation.

---

## OWNERSHIP & INFRASTRUCTURE

• Organization: Dmytro, Ahrefs Pte Ltd
• Netname: OVH-CUST-281059684
• Infrastructure Type: CloudCompute (OVH Hosting)
• CIDR Block: 51.161.37.0/24
• Registration: ARIN

---

## GEOLOCATION ANALYSIS

Location Discrepancy Detected:

• Claimed Location: Singapore
• Inferred Location: Canada (CA)
• Validation Status: FAILED

The RTT measurement of 26ms violates the minimum possible RTT of 121.6ms for the claimed 6,082km distance. This geolocation spoofing or inaccuracy suggests the IP may be operating from a location inconsistent with reported data.

---

## THREAT INDICATORS

No active threat indicators present, but the subnet context requires attention.

---

## SUBNET NEIGHBORHOOD ANALYSIS

Subnet: 51.161.37.0/24

• Abuse Density: 0.7695 (HIGH)
• Classification: High Abuse
• Total Siblings: 256
• Active Siblings: 214
• Threat Siblings: 197

The parent subnet exhibits elevated abuse activity with 197 threat-identified IPs among 256 total addresses. This contextual risk factor suggests the IP may be part of compromised infrastructure or shared hosting with malicious neighbors.

---

## DNS & SERVICE ANALYSIS

• PTR Hostname: proxy-ca005-san240.ahrefs.net
• Domain: ahrefs.net
• Forward Resolution: Not confirmed
• Open Ports: None detected
• Services: Firewalled / No Services
• TLS Certificate: Not available

The absence of open ports and services indicates the endpoint is either passive, heavily firewalled, or configured for outbound-only communication.

---

## OBSERVATION HISTORY

Total Observations: 22

Recent trends show subnet abuse density fluctuating between 0.5078 and 0.7695. Inherited risk scores remain in the 20-30 range, indicating persistent but variable subnet-level threat activity.

---

## RECOMMENDED ACTIONS

Firewall Blocking Rules:

```bash

# iptables

iptables -A INPUT -s 51.161.37.240 -j DROP

# nftables

nft add rule inet filter input ip saddr 51.161.37.240 drop

# pfSense

51.161.37.240/32

# Cloudflare WAF

ip.src eq 51.161.37.240 → Block

# AWS WAF

Addresses: 51.161.37.240/32

```

SOC Analyst Notes:

• Block at perimeter due to high-abuse subnet context
• Monitor for outbound traffic patterns
• Verify legitimate business use before allowing
• Cross-reference with Ahrefs threat intelligence sources

---

END OF BRIEFING

This summary was generated by AI and may contain inaccuracies. Verify critical details independently.