77.164.41.15📋 Copy

# IP INTELLIGENCE BRIEFING

Target: 77.164.41.15/32

Date: Current Analysis

Classification: Moderate Risk

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## EXECUTIVE SUMMARY

IP address 77.164.41.15 is associated with KPN (AS1136), a Dutch internet service provider operating out of Uden. The address registers a moderate risk score of 50 and is currently firewalled with no active services. While not classified as a known malicious source, the IP appears on two DNS blacklist entries, warranting defensive filtering.

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## TECHNICAL PROFILE

Network Attribution:

• ASN: 1136 (KPN-MNT)
• Organization: KPN (Netherlands)
• Geolocation: Uden, Netherlands (52.13°N, 5.29°E)
• CIDR Block: 77.164.41.0/24

DNS Resolution:

• PTR Record: 77-164-41-15.fixed.kpn.net
• Forward Resolution: Confirmed
• Hosted Domains: None detected

Network State:

• Open Ports: None detected
• Service Classification: Firewalled / No Services
• Tor Exit Node: No
• Known Attacker: No
• Spam Source: No

DNSBL Status:

• Listed: 2 of 8 monitored blacklists
• Implications: Passive reputation concerns from external reputation services

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## OBSERVATION HISTORY

Signal monitoring indicates the following temporal patterns:

• June 2026: DNS observations show active SPF and DMARC record publication for the associated kpn.net domain, indicating legitimate email infrastructure configuration.
• DNSBL Activity: Historical records indicate blacklist presence with high-severity listings observed.
• Reputation Stability: No persistent malicious activity patterns detected.

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## NETWORK RELATIONSHIPS & NEIGHBORHOOD ANALYSIS

Subnet Context (77.164.41.0/24):

• Abuse Density: 0 (Clean classification)
• Neighbor Count: 0 active siblings
• Threat Siblings: 0

Entity Relationships:

• Primary associations limited to DNS hostnames within the KPN infrastructure
• No links to known malicious organizations or campaigns
• No certificate-based threat correlations

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## THREAT ASSESSMENT

Risk Score: 50/100 (Moderate Risk)

Key Risk Factors:

• DNSBL presence on two reputation services
• Historical blacklist associations
• No positive indicators of legitimate service hosting

Mitigating Factors:

• Association with established Tier-1 ISP (KPN)
• Properly configured email authentication (SPF/DMARC)
• No open ports or active services
• Clean neighborhood classification
• No observed malicious campaigns

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## RECOMMENDED ACTIONS

Based on the risk profile, the following defensive measures are recommended:

Firewall Rules:

• `iptables`: `iptables -A INPUT -s 77.164.41.15 -j DROP`
• `nftables`: `nft add rule inet filter input ip saddr 77.164.41.15 drop`
• `nginx`: `deny 77.164.41.15;`
• `pfSense`: Block 77.164.41.15/32
• `Cloudflare WAF`: Block with description "IPDebrief risk score 50"
• `AWS WAF`: Add 77.164.41.15/32 to blocked addresses

Operational Guidance:

• Implement IP blocking at perimeter firewall
• Monitor for any service activity if rules are removed
• Correlate with inbound traffic logs to identify source of blacklist listings

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End of Briefing

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