Port Number Lookup
Reference standard TCP and UDP port numbers, protocols, and network daemon descriptions.
TCP/UDP Port Number Lookup
About Port Number Lookup
The TCP/UDP Port Number Directory provides instant search and lookup across all IANA Well-Known (0-1023), Registered (1024-49151), and Dynamic ports with transport protocol definitions (TCP/UDP), security risks, and service associations.
How to Use Port Number Lookup
Step 1
Enter a port number (0–65535) or service name into the search box.
Step 2
Inspect matching IANA records, transport protocols, and security descriptions.
Step 3
Click "Copy Port Info".
Practical Use Cases for Port Number Lookup
Firewall & Network Security Configuration
Identify open port numbers, configure router port forwarding, and set AWS Security Group ingress rules (e.g. Port 22 SSH, Port 443 HTTPS, Port 3306 MySQL).
DevOps & Microservice Debugging
Look up default service ports for Redis (6379), PostgreSQL (5432), MongoDB (27017), Kafka (9092), and Elasticsearch (9200).
Input & Output Examples
Looking Up Port 8080
Query: 8080
Port: 8080 | Protocol: TCP/UDP | Service: HTTP Alternate / Web Proxy | Category: Registered Port
Key Features & Performance
- ✓Comprehensive database of all IANA standard and popular cloud service port assignments.
- ✓Bidirectional search: Search by port number (e.g. 5432) or service keyword (e.g. "postgres").
- ✓Displays Transport Protocol (TCP/UDP), Port Category, and common vulnerability notes.
- ✓100% Client-Side interactive directory.
- ✓1-Click Copy port details.
Key Terminology & Definitions
Well-Known Ports (0–1023)
System ports assigned by IANA for foundational internet services (HTTP 80, HTTPS 443, SSH 22, DNS 53), requiring root privileges on Unix systems.
Registered Ports (1024–49151)
User and application ports listed by IANA for specific vendor protocols and database services.