Port Service Lookup

Search port numbers and service names. Enter a port number (e.g. 22) or service name (e.g. ssh) to find matches from the IANA registry and common unofficial ports.

Port Detail

Service: ssh
Protocol: TCP, UDP
Status: IANA Official
Description: Secure Shell — encrypted remote login and command execution
Common Usage: Remote server administration, SCP/SFTP file transfers, SSH tunneling

Common Ports

Type to filter the table, or press Lookup / Enter for an exact port or service match.

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Port	Service	Protocol	Status	Description

How It Works

Network ports are virtual endpoints for communication. When a device sends or receives data over TCP or UDP, it uses a port number (0–65535) to direct traffic to the correct application. The Internet Assigned Numbers Authority (IANA) maintains the official registry of port-to-service assignments.

Port Ranges

0–1023: Well-Known Ports — reserved for common system services (HTTP, SSH, DNS). Typically require root/admin privileges to bind.
1024–49151: Registered Ports — assigned by IANA for specific applications (MySQL, PostgreSQL, Redis).
49152–65535: Dynamic/Ephemeral Ports — used for temporary client-side connections.

TCP vs UDP

TCP (Transmission Control Protocol): Connection-oriented, reliable delivery with ordering and error-checking. Used by HTTP, SSH, SMTP, databases.
UDP (User Datagram Protocol): Connectionless, faster but no guarantee of delivery. Used by DNS, DHCP, streaming, gaming.
Many services register both TCP and UDP ports, even if they primarily use one protocol.

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