Curated List of Registered Ports — A Practical Reference for Modern Engineers
The Curated List of Registered Ports is a streamlined, purpose-built reference designed to highlight the most relevant and widely used ports in today’s networking, cybersecurity, and enterprise environments. While the official IANA registry contains thousands of entries — many obscure, deprecated, or vendor-specific — this curated list focuses on the ports that actually matter in real-world engineering, MSP/MSSP operations, SOC workflows, cloud architectures, and secure network design.
Registered ports (numbered 1024–49151) occupy the space between well-known system ports and ephemeral client ports. This range includes the ports used by:
- Database platforms
- Application servers
- Messaging queues
- DevOps and container orchestration systems
- Backup and storage platforms
- RMM tools and remote-access suites
- Proprietary vendor applications
- Security platforms (SIEM, EDR/XDR, analytics engines)
Because of their flexibility and vendor adoption, registered ports often represent critical infrastructure touchpoints — and, if misconfigured or exposed, some of the most dangerous attack surfaces in an environment. By consolidating the ports most frequently encountered across modern deployments, this curated list allows engineers to quickly:
- Validate required connectivity for applications and services
- Harden firewall rules and security groups
- Identify potentially exposed or unnecessary services
- Compare vendor documentation against real-world usage
- Troubleshoot connectivity, performance issues, and agent behavior
- Build compliant, least-privilege access models
- Accelerate onboarding for MSP/MSSP customers
Each entry in the curated list includes:
- Port — The number or range defined within the registered port space
- Protocol — TCP, UDP, or dual-stack behavior
- Service / Application — The primary function or vendor association
- Notes — Security considerations, operational usage, or risk insights
Unlike generic internet port lists, this curated dataset intentionally removes:
❌ Obsolete protocols
❌ Defunct or unused services
❌ Experimental or vendor-abandoned ports
❌ Ports with no practical relevance to modern network engineering
Instead, it delivers:
✔ High-value ports used today across cloud, on-prem, hybrid, and distributed systems
✔ Ports actively required by RMM, EDR, SIEM, and management platforms
✔ Ports known to be targeted by attackers for lateral movement or exploitation
✔ Ports critical to enterprise operations (databases, messaging, storage, orchestration)
✔ Ports foundational to emerging architectures like zero-trust, containerization, and automation
The Curated List of Registered Ports serves as both:
- A training resource for engineers building their foundational networking skill set
- A daily operational tool for senior engineers performing architecture, troubleshooting, and security assessments
Future releases will include:
- Registered Ports v2: MITRE ATT&CK risk mapping
- Registered Ports v3: Cloud provider (AWS/GCP/Azure) service associations
- Registered Ports v4: Threat intelligence weighting and exploitation frequency
- Registered Ports v5: API-driven dynamic search with vendor filters
As part of the SalesEngineer.Cloud Port & Protocol Library, this curated list helps ensure that engineers have access to the most accurate, relevant, and actionable port data available — without the noise.