51.195.244.154📋 Copy

IP Intelligence Briefing: 51.195.244.154

Date: 2026-06-14

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**Key Risk Indicators**

• Risk Profile: Moderate (40/100) but resides in a high_abuse subnet (abuse density: 0.6078).
• Network Context:

- Provider: OVH CloudCompute (ASN 16276).

- Ownership: Registered to Ahrefs Pte Ltd (Singapore), but geolocated to London, England.

- Subnet: 51.195.244.0/24, with 155/255 IPs flagged as threats.

• Threat Signals:

- DNSBL Listing: 1/8 DNSBLs (e.g., Spamhaus).

- High Abuse Density: Subnet shows 60.78% abuse risk, with 175 active IPs and 155 malicious siblings.

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**Observation History**

• Recent Activity:

- Abuse density increased from 0.6078 (June 6) to 0.7137 (June 14).

- No persistent malicious behavior detected (threat persistence: 0 days).

• Geolocation Validity:

- Plausible (473km from London, 91.6ms avg RTT).

- No geo-IP mismatches.

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**Network Relationships**

• Shared Subnet:

- OVH_282347336 (ASN 16276).

- 155/255 IPs in subnet flagged as threats.

• Control Plane:

- DNSSEC Valid, CAA Records Present, but DNSBL-listed (1/8).

- No BGP anomalies or route instability.

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**Actionable Threat Narrative**

1. Subnet Risk: The IP resides in a high_abuse subnet with 60.78% abuse density. 155/255 IPs are malicious, indicating potential for lateral movement or botnet activity.

2. Ownership Discrepancy: While registered to Ahrefs (a legitimate SEO company), the geolocation and DNSBL listing suggest possible misuse or misconfiguration.

3. Cloud Infrastructure: As an OVH CloudCompute IP, it may be used for hosting malicious services. Monitor for unexpected open ports or TLS activity.

4. Neighbor Analysis: 100+ IPs in the subnet show mixed risk scores. Prioritize blocking high-risk siblings (e.g., IPs with 50+ risk scores) to mitigate lateral threats.

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**Recommended Actions**

• Block Subnet: Consider blocking 51.195.244.0/24 to mitigate exposure to the high-abuse network.
• Verify Ownership: Confirm Ahrefs’ use of this IP and check for internal misuse.
• Monitor Traffic: Use SIEM to detect anomalies (e.g., unexpected DNS queries, outbound connections).
• Update DNSBL Rules: Ensure DNSBLs (e.g., Spamhaus) are integrated into firewall/WAF rules.

SOC Analyst Note: This IP is part of a compromised subnet. Prioritize isolation and forensic analysis to prevent potential exploitation.

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