54.39.136.63📋 Copy

# IP Intelligence Briefing: 54.39.136.63/32

Generated: 2026-06-26

IP Address: 54.39.136.63/32

Risk Assessment: Moderate Risk (Score: 40)

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## Executive Summary

IP 54.39.136.63 is a cloud-hosted infrastructure IP assigned to OVH network (AS16276) under organization Dmytro, Ahrefs Pte Ltd. The IP resolves to a DNS PTR record proxy-ca002-san63.ahrefs.net with forward resolution to ahrefs.net. No open ports or active services were detected; the IP is classified as "Firewalled / No Services."

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## Network Classification & Ownership

• ASN: 16276 (OVH)
• Organization: Dmytro, Ahrefs Pte Ltd
• Network Name: OVH-CUST-281059681
• CIDR Block: 54.39.136.0/24
• RIR: ARIN
• Infrastructure Type: CloudCompute
• Hosting Provider: OVH
• Network Role: Hosting (confirmed)

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## Geolocation & Routing

• Country: Canada (CA)
• Region: Quebec (QC)
• City: Beauharnois
• BGP Prefix: 54.39.0.0/16
• Route Stability: Unstable (isRouteStable: false)
• DNSSEC Valid: Yes
• CAA Records: Present

Anomaly Note: Geolocation validation flagged a discrepancy. Measured RTT (27ms) is significantly below the minimum possible RTT (112.6ms) for the 5,629km distance to the reported location, indicating potential geolocation spoofing or measurement error.

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## Threat Intelligence Assessment

Current Threat Indicators: None detected

• Known Attacker: No
• Spam Source: No
• Tor Exit Node: No
• Blacklist Count: 0
• Known Campaigns: None

Control Plane Risk:

• DNSBL Listed: 1 of 8 total lists
• Operator Score: 0.2174 (Minimal)
• Abuse Confidence Score: Not calculated

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## Neighborhood Analysis (54.39.136.0/24)

The /24 subnet shows elevated abuse activity:

• Abuse Density: 0.6797 (High)
• Total Siblings: 256
• Active Siblings: 182
• Threat Siblings: 174
• Inherited Risk Score: 27
• Classification: high_abuse

Risk distribution across the subnet: 92 medium-risk, 8 low-risk, 0 high-risk neighbors. This indicates the IP operates within a high-abuse-density environment typical of shared cloud hosting infrastructure.

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## Historical Observation Summary

25 observations recorded since initial detection. Most recent signals (2026-06-26):

• Domain resolution to ahrefs.net (confidence: 0.80)
• Operator classification: Minimal (confidence: 0.30)
• Network classification: Cloud/Hosting (confidence: 0.90)
• Subnet abuse density: 0.6797, high_abuse (confidence: 0.75)

No ownership changes or persistent malicious activity observed. Threat observation count: 1.

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## Relationship Graph

59 relationships identified, primarily network-level associations to OVH-CUST-281059681. No certificate, hostname, or organization-level relationships detected beyond the hosting network assignment.

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## Recommended Security Actions

Risk Score: 40 (Moderate)

While no specific recommendations were generated due to lack of active threat indicators, the following blocking rules are provided for defensive posture:

Firewall/Blocking Rules:

• iptables: `iptables -A INPUT -s 54.39.136.63 -j DROP`
• nftables: `nft add rule inet filter input ip saddr 54.39.136.63 drop`
• nginx: `deny 54.39.136.63;`
• pfSense: `54.39.136.63/32`
• Cloudflare WAF: Block with expression `ip.src eq 54.39.136.63`
• AWS WAF: Add `54.39.136.63/32` to blocked addresses

Operational Notes:

• IP has no open services or ports; blocking will prevent inbound connection attempts
• High neighborhood abuse density suggests monitoring for additional IPs in the /24 subnet
• DNSSEC and CAA records are valid, indicating proper DNS configuration
• No email reputation data available (no SPF/DMARC records)

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## Intelligence Narrative

IP 54.39.136.63 operates as a cloud-hosted infrastructure endpoint within OVH's Canadian network infrastructure. The IP resolves to ahosting proxy service (proxy-ca002-san63.ahrefs.net) but presents no active services or open ports. Despite moderate risk scoring, the IP's neighborhood exhibits significant abuse density with 174 threat-sibling IPs in the same /24 subnet, suggesting shared hosting abuse patterns. The geolocation RTT anomaly indicates potential data integrity issues with location reporting. No active threat campaigns or known malicious activity were identified.

Assessment: This IP represents moderate-risk cloud hosting infrastructure within a high-abuse-density network segment. While no direct threat indicators exist, the neighborhood context warrants monitoring for emerging abuse patterns in the 54.39.136.0/24

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Final Assessment:

The IP should be treated as a moderate-risk infrastructure endpoint requiring standard monitoring protocols. The absence of open services reduces immediate threat exposure, but the high-abuse neighborhood context suggests potential for future compromise or misconfiguration. SOC analysts should configure alert rules for outbound connections originating from this subnet and monitor for any service activation on this IP address.

Classification Status:

• Threat Level: Moderate
• Action Required: Monitor / Block (discretionary)
• Review Cadence: Quarterly or upon neighborhood threshold changes

Data Sources: IPDebrief Intelligence Platform

Collection Timestamp: 2026-06-26T07:21:17Z

Data Freshness: < 24 hours (real-time)

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*End of Intelligence Briefing*

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