181.53.12.73📋 Copy

# IPDebrief Intelligence Briefing

Target: 181.53.12.73/32

Classification: Residential ISP Endpoint

Date: Current Analysis Cycle

Risk Score: 40 (Moderate)

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## Executive Summary

181.53.12.73 is a residential endpoint IP assigned to Telmex Colombia S.A. (ASN 10620). The IP currently shows moderate risk (40) due to historical DNSBL listings, but exhibits no active threat indicators. No open services detected; classified as "Firewalled / No Services."

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## Ownership & Infrastructure

• ASN: 10620 (Telmex Colombia S.A.)
• CIDR Block: 181.48.0.0/13
• Network Name: 181.48.0.0 - 181.55.255.255
• RIR: LACNIC
• Abuse Contact: Available via RDAP
• Geolocation: Bogotá, Colombia (4.57°N, -74.3°W)

## Service Analysis

• Open Ports: None detected
• Service Classification: Firewalled / No Services
• DNS PTR: dynamic-ip-1815301273.cable.net.co
• Forward Resolution: Confirmed (1 hostname)
• HTTP/HTTPS: No services detected
• TLS Certificates: None

## Threat Indicators

• Blacklist Status: Listed on 2 of 8 DNSBLs
• Tor Exit Node: No
• Known Attacker: No
• Spam Source: No
• Campaign Correlation: None
• Abuse Confidence Score: Not applicable (no active threats)

## Neighborhood Analysis

Subnet: 181.53.12.73/24

• Abuse Density: 0% (Clean)
• Total Siblings: 2
• Active Siblings: 1
• Threat Siblings: 0
• Neighbor: 181.53.12.188 (Risk Score: 0)

## Historical Observations

• Observations Tracked: 18
• Subnet Classification: Consistently "Clean"
• Threat Persistence: 0 days
• Ownership Changes: 0
• Recent Signals:

- Geolocation inference: Colombia (52% confidence)

- Network role: Residential/ISP (30% confidence)

- Org registration: Telmex Colombia S.A. (90% confidence)

## Relationship Graph

• 7 Relationships Identified
• Primary Association: Same Network (181.48.0.0 - 181.55.255.255)
• DNS Associations: dynamic-ip-1815301273.cable.net.co (4 instances)

## Recommended Security Actions

Firewall Rules:

• iptables: `iptables -A INPUT -s 181.53.12.73 -j DROP`
• nftables: `nft add rule inet filter input ip saddr 181.53.12.73 drop`
• nginx: `deny 181.53.12.73;`
• Cloudflare WAF: Block rule with expression `ip.src eq 181.53.12.73`
• AWS WAF: Address `181.53.12.73/32`

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## Intelligence Assessment

This IP is a residential cable endpoint with historical DNSBL listings but no current threat activity. The moderate risk score (40) reflects legacy reputation data rather than active malicious behavior. No open services detected suggests the endpoint is not being used for command-and-control or web-based attacks.

Recommended Action: Block at perimeter firewall if internal policy prohibits residential ISP ranges. Monitor for service activation. No immediate threat response required.

Confidence Level: High

Data Freshness: Current analysis cycle

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*Generated by IPDebrief Intelligence Platform*

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