34.21.87.139📋 Copy

# INTELLIGENCE BRIEFING: IP 34.21.87.139

Classification: Moderate Risk Infrastructure IP

Generated: 2026-06-19

Analyst: IPDebrief Intelligence Team

---

## EXECUTIVE SUMMARY

IP address 34.21.87.139 is a Google Cloud infrastructure endpoint associated with googleusercontent.com. The IP presents a moderate risk profile (risk score: 50) with no direct threat indicators, though it appears on 2 of 8 DNSBLs with one listing marked as high severity. The address is part of Google's cloud compute infrastructure in Washington, DC. No open ports or active services were detected during probing.

---

## OWNERSHIP & INFRASTRUCTURE

Key Findings:

• Ownership confirmed as Google LLC with stable registration
• Infrastructure classification: CloudCompute hosting environment
• DNS reverse resolution confirms googleusercontent.com association
• No open ports detected; service purpose listed as "Firewalled / No Services"

---

## THREAT ASSESSMENT

Overall Risk Score: 50 (Moderate Risk)

DNSBL Analysis:

• Total DNSBL listings: 8
• Active listings: 2
• Maximum severity: High
• Most recent listing observed: 2026-06-19

---

## OBSERVATION HISTORY

Total Observations: 25 signals over monitoring period

Notable Events:

• 2026-06-19: DNSBL listing observed with high severity
• 2026-06-15: Subnet-level analysis showing mostly_clean classification with abuse density of 1
• Recent operator score: 0.3478 (Basic operator classification)

Temporal Analysis:

• Ownership changes: 0
• Threat observation count: 1
• Threat persistence days: 0
• No persistent malicious activity detected

---

## NETWORK RELATIONSHIPS

Total Relationships: 42

Primary Associations:

• DNS Association: 139.87.21.34.bc.googleusercontent.com
• Network: GOOGL-2 (Google Cloud network)
• Same Network: Multiple entries indicating cloud infrastructure clustering

Campaign Correlation:

• Campaign likelihood: None
• Certificate matches: 0
• Correlated IPs: 0

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## NEIGHBORHOOD ANALYSIS

Subnet: 34.21.87.139/24

Assessment: Subnet shows low abuse density with minimal threat indicators. The IP appears isolated in terms of malicious activity within its /24 block.

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## GEOVALIDATION

Note: Geographic validation shows RTT discrepancy (23ms observed vs 125.9ms minimum for reported Washington DC location). This suggests either routing anomalies or geolocation data inconsistency.

---

## RECOMMENDED ACTIONS

Risk Score: 50 (Moderate)

Recommended Firewall Rules:

```bash

# iptables

iptables -A INPUT -s 34.21.87.139 -j DROP

# nftables

nft add rule inet filter input ip saddr 34.21.87.139 drop

# nginx

deny 34.21.87.139;

# pfSense

34.21.87.139/32

# Cloudflare WAF

{"description":"Block 34.21.87.139 — IPDebrief risk score 50","action":"block","filter":{"expression":"ip.src eq 34.21.87.139"}}

# AWS WAF

{"Addresses":["34.21.87.139/32"],"Description":"IPDebrief risk 50"}

```

Action Notes:

• No specific recommendations generated due to moderate risk profile
• Block rules provided for common security platforms
• Consider contextual analysis before implementing blocking measures

---

## INTELLIGENCE SUMMARY

IP 34.21.87.139 is a Google Cloud infrastructure endpoint with a moderate risk score. While the IP is not flagged as a known attacker or spam source, it appears on 2 DNSBLs with one high-severity listing. The address lacks active services or open ports, suggesting it may be a reserved or firewall-protected endpoint. Neighborhood analysis indicates low abuse density within the /24 subnet. The geographic validation discrepancy warrants monitoring but does not confirm malicious activity. Current risk assessment supports defensive monitoring with optional blocking depending on organizational threat posture.

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