91.21.91.109📋 Copy

IP Intelligence Briefing: 91.21.91.109

Date: 2026-06-10

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**1. Core Profile**

• Risk Score: 50 (Moderate Risk)
• Ownership: Deutsche Telekom AG (ASN 3320, RIPE)
• Geolocation: Germany (North Rhine-Westphalia, Rahden)
• Network Role: Mobile Carrier (LTE/5G)
• Threat Indicators: No direct malicious activity detected (no malware, phishing, or known attacker associations).

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**2. Observation History**

• DNSBL Listings:

- Listed in 8 DNSBLs (high severity) with 16 observations over 30 days.

- Confidence: 0.85 (likely legitimate but flagged for monitoring).

• BGP Data:

- ASN 3320 (DTAG-NIC) owns the 91.0.0.0/10 prefix.

• Operator Score: "Basic" (low risk, but not fully verified).

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**3. Relationships**

• DNS Associations:

- Linked to `p5b155b6d.dip0.t-ipconnect.de` (Telekom DNS hostname).

• Network Relationships:

- Part of the "DTAG-DIAL22" network (same subnet).

• No Known Campaigns or Malware Signatures.

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**4. Neighborhood Analysis**

• Subnet: 91.21.91.0/24
• Abuse Density: 0% (no malicious neighbors detected).
• Active Siblings: 0 (isolated IP).

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**5. Security Actions**

• Firewall Rules (Recommended):

- iptables: `iptables -A INPUT -s 91.21.91.109 -j DROP`

- nftables: `nft add rule inet filter input ip saddr 91.21.91.109 drop`

- Cloudflare/WAF: Block IP with description "IPDebrief risk 50."

• No High-Priority Actions: Low risk score and no active threats suggest minimal immediate action required.

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**6. Analyst Notes**

• Monitor for Anomalies: While not malicious, the IP’s DNSBL listings and mobile carrier context warrant monitoring for unexpected behavior.
• Verify Context: The "Basic" operator score and lack of abuse history may indicate a legitimate IP, but cross-check with internal threat feeds.
• Network Segmentation: Consider isolating mobile carrier traffic if critical systems are exposed to public networks.

Next Steps: Re-evaluate if new threat intelligence emerges, especially if the IP shows increased activity or ties to known malicious campaigns.

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