85.203.21.36📋 Copy

IP INTELLIGENCE BRIEFING: 85.203.21.36/32

EXECUTIVE SUMMARY

IP 85.203.21.36 is classified as moderate risk (score 40) and operates as a firewalled endpoint within a high-abuse subnet. The address is geolocated to Singapore and associated with a VPN consumer network. While no direct malicious indicators were observed, the IP resides in a neighborhood with elevated abuse density (0.6424), warranting defensive attention.

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OWNERSHIP & NETWORK CLASSIFICATION

• ASN: 206092 (SECFIREWALLAS - F.N.S. HOLDINGS LIMITED, CY)
• Organization: Jeroen van veen
• RIR: RIPE
• Network: 85.203.21.0/24
• Geolocation: Singapore (1.35°N, 103.82°E), 45km accuracy
• Classification: Firewalled / No Services
• Infrastructure Type: VPN-Consumer-Network

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THREAT POSTURE & INDICATORS

• Risk Score: 40 (Moderate Risk)
• Abuse Confidence: Not scored
• Blacklist Status: 0 direct listings, 1 DNSBL listing among 8 total lists
• Threat Indicators: None detected (not Tor exit, not known attacker, not spam source)
• Known Campaigns: None correlated
• Behavioral Signals: 0 honeypot hits, 0 enumeration strikes, 0 WAF violations
• Service Status: No open ports, no TLS certificates, no HTTP services detected

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NEIGHBORHOOD ANALYSIS: 85.203.21.0/24

• Total Siblings: 151 IPs
• Active Siblings: 72
• Threat Siblings: 97
• Abuse Density: 0.6424 (High Abuse)
• Risk Distribution: 0 high-risk, 76 medium-risk, 24 low-risk

The subnet exhibits significant abuse concentration with 64% abuse density. The target IP shares network characteristics with 97 threat-siblings, indicating this is part of an actively exploited network infrastructure.

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HISTORICAL OBSERVATION TRENDS

Total: 16 observations recorded

• Recent Activity: Signals observed 2026-06-26 (most recent) and 2026-06-06
• Geolocation Consistency: Singapore (SG) consistently identified across observations
• ASN Resolution: ASN 206092 confirmed via team-cymru-dns
• Ownership Stability: No ownership changes detected
• Threat Persistence: 0 threat persistence days, not persistently malicious
• Observation Confidence: Variable (0.21-0.85), with lower confidence on recent signals

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RELATIONSHIP MAPPING

• Total Relationships: 10
• Relationship Type: Same Network (all 10 relationships)
• Target Classification: VPN-Consumer-Network (all targets)
• Network Role: VPN consumer endpoint within a consumer-facing network

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RECOMMENDED ACTIONS

Immediate Mitigation (Risk Score 40):

```

# iptables

iptables -A INPUT -s 85.203.21.36 -j DROP

# nftables

nft add rule inet filter input ip saddr 85.203.21.36 drop

# nginx

deny 85.203.21.36;

# pfSense

85.203.21.36/32

# Cloudflare WAF

Block 85.203.21.36 — IPDebrief risk score 40

# AWS WAF

Addresses: 85.203.21.36/32, Description: IPDebrief risk 40

```

Intelligence-Guided Recommendations:

1. Block the IP at perimeter firewalls due to high-abuse neighborhood context

2. Monitor subnet 85.203.21.0/24 for additional threat siblings

3. Consider blocking entire /24 if legitimate use not confirmed

4. Review historical connection logs for any outbound traffic patterns to/from this IP

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ASSESSMENT

This IP represents a moderate-risk endpoint operating in a high-abuse subnet. The lack of active services and VPN consumer classification suggest this may be a residential or proxy endpoint. The neighborhood abuse density of 0.6424 combined with 97 threat siblings indicates this is part of a compromised network segment. Defensive blocking is recommended pending legitimate use verification.

Last Updated: 2026-06-26

Data Source: IPDebrief Intelligence Platform

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