51.89.129.168📋 Copy

# IP INTELLIGENCE BRIEFING: 51.89.129.168/32

Date: 2026-06-20

Classification: Moderate Risk

Risk Score: 50/100

---

## EXECUTIVE SUMMARY

IP 51.89.129.168 is a hosting infrastructure address operated by OVH (ASN 16276) in London, United Kingdom. The address belongs to Ahrefs Pte Ltd Dmytro and resolves to proxy-uk008-san168.ahrefs.net. While the IP itself shows no active threat indicators, its /24 subnet (51.89.129.0/24) exhibits elevated abuse density (0.6406), requiring contextual monitoring.

---

## OWNERSHIP & GEOLOCATION

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## THREAT ASSESSMENT

Current Risk Profile:

• Risk Score: 50 (Moderate)
• Operator Score: 0.2174 (Minimal)
• Abuse Confidence Score: Not available
• Known Campaigns: None detected
• Blacklist Status: 0 entries

Threat Indicators:

• Not a Tor exit node
• Not flagged as known attacker
• Not identified as spam source
• No active threat indicators in current profile

DNSBL Status: Listed on 2 of 8 total DNSBL feeds

---

## NETWORK CONTEXT

Subnet Analysis (51.89.129.0/24):

• Classification: High Abuse
• Abuse Density: 0.6406
• Total Siblings: 256
• Active Siblings: 156
• Threat Siblings: 164
• Inherited Risk Score: 25

Key Finding: The immediate subnet shows elevated abuse density, indicating potential shared infrastructure risks despite this specific IP's clean profile.

---

## OBSERVATION HISTORY

Total Observations: 19 signals recorded

Recent Activity:

• 2026-06-20: Minimal operator score (0.2174), 6-dimension coverage
• 2026-06-15: High abuse subnet classification maintained, consistent operator score

Temporal Analysis: No ownership changes detected. Threat persistence days: 0. The IP is not classified as persistently malicious.

---

## RELATIONSHIPS

Total Relationships Identified: 38

• Primary association: Same Network (OVH_282347344)
• No certificate or hostname relationships detected in graph

---

## RECOMMENDED SECURITY ACTIONS

Based on risk profile, the following firewall rules are recommended:

iptables:

```

iptables -A INPUT -s 51.89.129.168 -j DROP

```

nftables:

```

nft add rule inet filter input ip saddr 51.89.129.168 drop

```

nginx:

```

deny 51.89.129.168;

```

Cloudflare WAF:

```json

{

"description": "Block 51.89.129.168 — IPDebrief risk score 50",

"action": "block",

"filter": {"expression": "ip.src eq 51.89.129.168"}

}

```

AWS WAF:

```json

{

"Addresses": ["51.89.129.168/32"],

"Description": "IPDebrief risk 50"

}

```

Note: These recommendations are probabilistic and should be combined with other contextual signals before implementation.

---

## ANALYST NOTES

1. Infrastructure vs. Threat: The IP hosts legitimate services (Ahrefs proxy) but operates in a high-abuse-density subnet. This suggests shared hosting infrastructure risks rather than direct compromise.

2. Monitoring Recommendation: Implement subnet-level monitoring (51.89.129.0/24) given the 0.6406 abuse density. Monitor for any changes in DNS resolution or service banners.

3. Action Threshold: Current risk score (50) warrants blocking if the IP is not in an allowlist. No immediate escalation needed absent additional threat correlation.

4. Historical Context: 19 observations over recent periods show stable behavior with no degradation trends.

---

Generated by IPDebrief Intelligence Platform

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