54.39.210.58📋 Copy

# IP INTELLIGENCE BRIEFING: 54.39.210.58/32

Date: 2026-06-21

Classification: MODERATE RISK

Risk Score: 40/100

Analyst: IPDebrief Intelligence Team

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## EXECUTIVE SUMMARY

IP 54.39.210.58 is a cloud infrastructure endpoint hosted on OVH SAS in Quebec, Canada, associated with Ahrefs Pte Ltd. The IP demonstrates moderate risk (40/100) but operates within a /24 subnet exhibiting critically high abuse density (0.8008). The neighborhood contains 205 threat-identified siblings out of 206 active peers, indicating systematic abuse potential. Geolocation validation shows significant implausibility due to RTT discrepancies.

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## OWNERSHIP & INFRASTRUCTURE

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## GEOSPATIAL ANALYSIS

Claimed Location: Beauharnois, Quebec, Canada (45.3161°N, -73.8736°W)

Validation Status: ❌ INVALID

*The observed RTT is 4.1× lower than physically possible for the claimed distance. Geolocation confidence is FALSE (geoPlausible: false).*

---

## THREAT INTELLIGENCE

Known Indicators

• Blacklist Status: Listed on 1 of 8 DNS blacklists
• Tor Exit Node: No
• Known Attacker: No
• Spam Source: No
• Abuse Confidence Score: Not Available

Neighborhood Risk Profile (54.39.210.0/24)

• Abuse Density: 0.8008 (HIGH)
• Classification: High Abuse
• Active Siblings: 206
• Threat Siblings: 205 (99.5% threat rate)
• Inherited Risk Score: 32

Assessment: The /24 subnet demonstrates systemic compromise. Nearly all active endpoints in the neighborhood are threat-identified, suggesting either:

1. Widespread legitimate abuse by the hosting provider

2. Compromised infrastructure at the provider level

3. Legitimate hosting with high abuse potential

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## DNS & HOSTNAMES

PTR Record: proxy-ca007-san58.ahrefs.net

Forward Resolution: proxy-ca007-san58.ahrefs.net (1 record)

Hosted Domains: None detected

Assessment: DNS configuration indicates legitimate infrastructure naming (proxy-ca007-san58.ahrefs.net), but the hostname suggests proxy/forwarding functionality.

---

## OBSERVATION HISTORY

Recent Signals (2026-06-21):

• 00:27:16 UTC — VPN/Proxy detection (confidence: 0.85)
• 00:26:12 UTC — Cloud/Hosting infrastructure confirmed (confidence: 0.90)
• 00:28:54 UTC — Canadian geolocation (confidence: 0.35)

Temporal Trends:

• Ownership changes: 0
• Threat persistence: 0 days
• Total threat observations: 1
• Persistently malicious: FALSE

---

## RECOMMENDED ACTIONS

Firewall Rules (Risk Score: 40)

iptables:

```bash

iptables -A INPUT -s 54.39.210.58 -j DROP

```

nftables:

```bash

nft add rule inet filter input ip saddr 54.39.210.58 drop

```

nginx:

```nginx

deny 54.39.210.58;

```

Platform-Specific Recommendations

Cloudflare WAF: Block IP (risk score 40)

AWS WAF: Add 54.39.210.58/32 to IP set for blocking

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## SOC ANALYST DECISION MATRIX

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## INTELLIGENCE CONCLUSION

IP 54.39.210.58 presents moderate individual risk but operates within a high-abuse neighborhood (99.5% threat rate among active peers). The geolocation validation failure and single DNS blacklist listing suggest potential reputation compromise or infrastructure misuse. Given the systemic abuse in the /24 subnet, defensive blocking is recommended for inbound traffic. The infrastructure appears to be legitimate cloud hosting (Ahrefs), but the neighborhood abuse density warrants heightened scrutiny.

Priority: MEDIUM

Action Required: Monitor and consider blocking based on organizational risk tolerance

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*Generated by IPDebrief Intelligence Platform*

*Data sources: IPDebrief, ProxyCheck, Cymru, AbuseIPDB, and multiple threat feeds*

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