172.71.151.37📋 Copy

# IP Intelligence Briefing: 172.71.151.37/32

Classification: Cloudflare CDN Infrastructure | Risk Level: Low | Date: 2026-06-16

---

## Executive Summary

IP address 172.71.151.37 is identified as Cloudflare CDN infrastructure with a low-risk reputation score (25/100). The IP operates within Cloudflare's CLOUDFLARENET (172.64.0.0/13) and exhibits no direct threat indicators. However, neighborhood analysis reveals moderate abuse density (0.3333) within the /24 subnet, with 1 of 3 sibling IPs flagged as a threat source.

---

## Technical Profile

Ownership & Classification:

• ASN: 13335 (Cloudflare, Inc.)
• Organization: CLOUDFLARENET
• Infrastructure Type: CDN
• Service Purpose: Firewalled / No Services

Geolocation:

• Country: United States (US)
• Reported Region: Washington (WA), Seattle
• Validation Note: RTT measurements indicate 83ms average latency against a geographic distance of 7,883km, which violates minimum possible RTT constraints (157.7ms), suggesting geolocation data may be imprecise.

Control Plane:

• DNSSEC: Valid
• DNSBL Listings: 1 of 8 total lists
• BGP Prefix: 172.71.151.0/24

---

## Threat Assessment

Current Threat Indicators:

• No threat indicators detected
• Not a Tor exit node
• Not a known attacker
• Not a spam source
• Blacklist Count: 0
• No known campaign affiliations

Behavioral Analysis:

• No open ports detected
• No TLS certificates observed
• No HTTP services responding
• No honeypot hits recorded
• Not persistently malicious

---

## Neighborhood Analysis (172.71.151.0/24)

Subnet Statistics:

• Total Siblings: 3
• Active Siblings: 1
• Threat Siblings: 1
• Abuse Density: 0.3333 (33%)
• Classification: mostly_clean

Neighbor Profiles:

*Note: Both neighbors show elevated authority scores despite low risk, consistent with CDN infrastructure profiles.*

---

## Observation History (17 Total Observations)

Recent Signal Activity (2026-06-16):

• Subnet abuse density consistently reported at 0.3333
• Classification stable at "mostly_clean"
• Inherited risk maintained at level 2
• No ownership changes observed
• Threat observation count: 0

Historical Consistency:

• Ownership stability: No changes recorded
• Threat persistence: 0 days
• Persistently malicious: False

---

## Recommendations

SOC Actionable Guidance:

1. Traffic Policy: No blocking required. This is legitimate CDN infrastructure.

2. Monitoring: Monitor for any behavioral changes from current CDN patterns.

3. Subnet Awareness: Be aware that 1 of 3 IPs in the /24 subnet shows threat indicators. Evaluate traffic from 172.71.151.x range with appropriate CDN expectations.

4. False Positive Consideration: The IP may generate alerts due to geographic inconsistencies in geolocation data; correlate with known Cloudflare traffic patterns to avoid misclassification.

5. Email Reputation: No email authentication records present; expected for CDN IP.

---

Intelligence Confidence: High

Data Sources: IPDebrief profile, history, relationships, and neighborhood analysis

Assessment Date: 2026-06-16

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