37.221.128.125📋 Copy

# THREAT INTELLIGENCE BRIEFING

Target: 37.221.128.125/32

Date of Analysis: 2026-07-30

Classification: High Risk

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## Executive Summary

IP address 37.221.128.125 registered to Radio Service Ltd. (ASN 62384) was assessed as High Risk with a risk score of 80/100. The address is located in Lviv, Ukraine, and is associated with network RADIOSERVICE-201712. No active threat indicators or blacklist entries were detected, but the elevated risk score warrants defensive monitoring.

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## Network Ownership and Classification

• Organization: Radio Service Ltd.
• ASN: 62384
• Network: RADIOSERVICE-201712
• CIDR Block: 37.221.128.0/20
• Geolocation: Lviv, Ukraine (UA)
• Network Role: Firewalled / No Services
• RIR: Ripe

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## Risk Assessment

The IP received a risk score of 80/100, classified as High Risk. Key risk factors include:

• Operator score: 0.1304 (Minimal)
• DNSBL listing count: 4 out of 8 total lists
• Route stability: Unstable
• Geographic validation: Not plausible (geoPlausible: false)

No threat indicators were detected, including:

• No known campaigns
• No Tor exit node association
• No known attacker or spam source flags
• Zero blacklist matches

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## Neighborhood Analysis

The /24 subnet (37.221.128.0/24) contains 28 neighbor IPs with an abuse density of 0.107. Risk distribution within the subnet:

• High Risk (80+): 3 IPs (37.221.128.54, 37.221.128.56, 37.221.128.200)
• Medium Risk: 22 IPs
• Low Risk: 3 IPs

Multiple high-risk neighbors suggest this subnet warrants broader monitoring.

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## Observation History

Fourteen signal observations were recorded. Recent observations included:

• Geographic inference pointing to Ukraine with 500km accuracy radius
• Traceroute analysis showing 30 hops with 22 timeouts
• Operator classification as Minimal risk
• No persistent malicious behavior detected

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## Recommended Actions

Priority: Critical

1. Increase logging verbosity for traffic from this IP address and review recent activity

2. Implement firewall rules to block or rate-limit traffic:

- iptables: `iptables -A INPUT -s 37.221.128.125 -j DROP`

- nftables: `nft add rule inet filter input ip saddr 37.221.128.125 drop`

- nginx: `deny 37.221.128.125;`

- pfSense: `37.221.128.125/32`

- Cloudflare WAF: Block IP 37.221.128.125 with expression `ip.src eq 37.221.128.125`

- AWS WAF: Add IP set `37.221.128.125/32` to rate limiting or block rule

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## Analyst Notes

While no active malicious indicators were detected, the high risk score combined with multiple high-risk neighbors in the same subnet suggests this IP should be monitored. The elevated risk may stem from historical activity or regional patterns. Consider blocking at perimeter controls while maintaining log review for potential anomalous activity patterns.

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