51.222.95.218📋 Copy

# IP Intelligence Briefing: 51.222.95.218/32

Classification: Moderate Risk | Risk Score: 40/100

Date of Analysis: 2026-06-21

Reporting Entity: IPDebrief Intelligence Platform

---

## Executive Summary

IP address 51.222.95.218/32 is hosted within OVH cloud infrastructure under organization Dmytro, Ahrefs Pte Ltd (ASN 16276). The IP is associated with the domain ahrefs.net and resolves to hostname proxy-ca010-san218.ahrefs.net. While the IP itself shows moderate risk characteristics (score 40), it operates within a high-abuse density subnet (51.222.95.0/24) containing 229 active siblings and 194 identified threat siblings. The IP has been DNSBL listed on 8 lists with 1 high-severity listing observed as of 2026-06-21.

---

## Infrastructure Profile

DNS Resolution: proxy-ca010-san218.ahrefs.net (forward confirmed: no)

Email Authentication: SPF: No, DMARC: No

---

## Threat Context

Current Risk Indicators:

• Blacklist Status: Listed on 1 DNSBL (of 8 total lists)
• Abuse Confidence: Not scored
• Known Attacker: No
• Tor Exit Node: No
• Spam Source: No

Subnet Risk Assessment (51.222.95.0/24):

• Abuse Density: 0.7578 (high)
• Classification: high_abuse
• Active Siblings: 229/256
• Threat Siblings: 194
• Inherited Risk: 30

Network Behavior:

• Hop Count: 17
• Transit Network: Comcast
• RPKI State: Not assessed
• Route Stability: False

---

## Historical Observations

Signal History (21 observations):

• 2026-06-21: Multiple DNSBL listings observed (8 total lists, 1 listed, max severity: high)
• 2026-06-16: Subnet abuse density confirmed at 0.7578 (high_abuse classification)
• Operator Score: 0.2174 (Minimal)

Temporal Analysis:

• No persistent malicious behavior detected
• No ownership changes recorded
• No correlated campaigns identified

---

## Relationship Mapping

Same Network Associations: OVH-CUST-281059689 (multiple entries)

DNS Associations: proxy-ca010-san218.ahrefs.net (repeated associations)

Control Plane: BGPPrefix 51.222.0.0/16, Origin ASN 16276

---

## Recommended Security Actions

The following firewall rules are recommended for blocking this IP address based on its risk profile:

iptables:

```

iptables -A INPUT -s 51.222.95.218 -j DROP

```

nftables:

```

nft add rule inet filter input ip saddr 51.222.95.218 drop

```

nginx:

```

deny 51.222.95.218;

```

pfSense:

```

51.222.95.218/32

```

Cloudflare WAF:

```json

{

"description": "Block 51.222.95.218 — IPDebrief risk score 40",

"action": "block",

"filter": {

"expression": "ip.src eq 51.222.95.218"

}

}

```

AWS WAF:

```json

{

"Addresses": ["51.222.95.218/32"],

"Description": "IPDebrief risk 40"

}

```

---

## Intelligence Assessment

This IP demonstrates moderate-risk characteristics within a high-abuse cloud hosting environment. The association with Ahrefs infrastructure provides contextual legitimacy, but the subnet-level abuse density and DNSBL listings warrant defensive measures. The absence of open services suggests the IP may be dormant or used for non-web services. Continued monitoring of the subnet is recommended due to the high concentration of threat siblings.

Priority Level: MEDIUM

Recommended Action: Block with logging for further analysis

Review Period: 7 days

---

*Report generated by IPDebrief Intelligence Platform. These recommendations are probabilistic and should be combined with additional threat intelligence signals before taking action.*

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