198.54.128.138
## IP Intelligence Briefing: 198.54.128.138/32
Classification: LOW RISK | Analysis Date: 2026-07-29
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Executive Summary
IP address 198.54.128.138 is a low-risk infrastructure endpoint belonging to TZULO-DEN (AS11878), a cloud hosting provider. The IP demonstrates minimal threat indicators, no active open ports, and no blacklisting. Recommended action: Standard monitoring with no blocking required.
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Ownership & Registration
| Attribute | Value |
|---|---|
| Organization | TZULO-DEN |
| ASN | 11878 |
| Network Block | 198.54.128.0/24 |
| RIR | ARIN |
| Abuse Contact | Not Provided |
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Geolocation
| Attribute | Value |
|---|---|
| Country | United States (US) |
| Region | Colorado (CO) |
| City | Denver |
| Coordinates | 39.55° N, -105.78° W |
| Timezone | America/Denver |
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Threat Assessment
| Metric | Value |
|---|---|
| Risk Score | 25/100 |
| Reputation | Low Risk |
| Abuse Confidence | None |
| Blacklist Count | 0 |
| Known Attacker | No |
| Spam Source | No |
| Tor Exit Node | No |
Network Role: Firewalled / No Services
Services: No open ports detected
TLS/HTTP: No active web services
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DNS Configuration
| Attribute | Value |
|---|---|
| PTR Hostname | static-198-54-128-138.cust.tzulo.com |
| Forward Resolution | Confirmed (1 record) |
| Domain | tzulo.com |
| SPF Record | Present |
| DMARC Record | Present |
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Network Neighborhood
Subnet: 198.54.128.0/24
Abuse Density: 0%
Neighbor Count: 1
Risk Distribution: 1 Low, 0 Medium, 0 High
Notable Neighbor: 198.54.128.124 (Risk: 0, Authority: 60)
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Relationship Graph
| Type | Target |
|---|---|
| Same Network | TZULO-DEN |
| DNS Association | static-198-54-128-138.cust.tzulo.com |
| DNS Association | static-198-54-128-138.cust.tzulo.com |
| Same Network | TZULO-DEN |
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Historical Observations (16 signals)
Recent Activity:
- 2026-07-29 16:21:12 UTC - Threat indicators detected (pulse_count: 3) via AlienVault OTX, Denver/CO location confirmed
- 2026-07-29 16:19:56 UTC - Geographic signals from multiple sources (US-based)
- 2026-07-29 16:19:24 UTC - Operator score: 0.2609 (Basic classification)
Temporal Analysis:
- Ownership changes: 0
- Threat persistence days: 0
- Persistently malicious: No
- Threat observation count: 0
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Control Plane Data
| Metric | Value |
|---|---|
| Origin ASN | 11878 |
| BGP Prefix | 198.54.128.0/24 |
| Route Stability | Unstable |
| MoAS | No |
| DNSSEC Valid | Yes |
| DNSBL Listed | 1/8 total lists |
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Recommended Actions
Security Posture: LOW RISK
Recommended Firewall Rules:
- No blocking required
- Standard allow policies apply
Monitoring Recommendations:
- Continue standard traffic monitoring
- No immediate threat mitigation needed
Context: This IP belongs to TZULO's customer infrastructure. The low-risk profile, combined with proper DNS configuration (SPF/DMARC present) and no open services, indicates legitimate cloud hosting usage rather than malicious activity.
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*Report generated from IPDebrief intelligence platform data.*
This summary was generated by AI and may contain inaccuracies. Verify critical details independently.
🏢 Ownership & Registration
| Organization | tzulo-den |
| ASN | AS11878 |
| Network Name | TZULO-DEN |
| CIDR Block | 198.54.128.0/24 |
| RIR | ARIN |
| Country | United States |
| Abuse Contact | — |
🌐 DNS Intelligence
| PTR | static-198-54-128-138.cust.tzulo.com |
| Forward Confirmed | Yes — FCrDNS verified |
| Forward Hostnames | static-198-54-128-138.cust.tzulo.com |
🔐 DNS Hygiene
| Hygiene Score | 80% (Excellent) |
| SPF | Present |
| DMARC | Present |
| FCrDNS | Verified |
| DNSSEC | Valid |
| CAA | Not configured |
☁️ Network Classification
| Infrastructure | Unknown |
| Service Purpose | Firewalled / No Services |
| Network Tier | Tier 3 — Basic operator with some routing infrastructure |
🔌 Services & Open Ports
| Port | Service | Protocol | Banner |
|---|---|---|---|
| No open ports detected | |||
| Closed Ports | 22, 25, 80, 443, 3389, 8080, 8443 (0 open / 7 scanned) | ||
| Server | — |
| HTTP Title | — |
🔐 TLS Certificate
| SANs | None |
| Valid From | — |
| Valid Until | — |
🎯 Confidence Breakdown
Per-dimension confidence scores based on source diversity and data freshness
| Dimension | Score | Sources | Observations |
|---|---|---|---|
| threat | 25% | 1 | 1 |
| routing | 25% | 1 | 1 |
| services | 25% | 1 | 1 |
| ownership | 25% | 1 | 1 |
| reputation | 0% | 0 | 0 |
| geolocation | 0% | 0 | 0 |
| Overall | 16% | 4 | 4 |
| Data Coherence | Consistent (100%) |
| Attribution | Moderate (70%) |
| OwnershipFCrDNSGeo ConsensusGeo PlausibleIRR MatchRPKI Valid |
📅 Observation Timeline 🔄 Live
| First Seen | 2026-07-23 01:41:16 UTC |
| Last Seen | 2026-08-01 22:41:41 UTC |
| Profile Built | 2026-07-29 16:31:30 UTC |
| Data Freshness | Live |
| Signal Types | 19 |
| Total Observations | 19 |
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