ポート番号リファレンスとは？

無料のオンライン ポート番号リファレンスツール。一般的な TCP および UDP ポート番号とその用途を検索。

TCP and UDP port numbers are the addressing mechanism that allows multiple network services to run on a single IP address. Every network-connected service listens on a specific port, and knowing which port corresponds to which service is essential for firewall configuration, network security auditing, software development, and system administration.

Port Number Reference covers 40+ of the most commonly used ports organized into categories: Web (HTTP/80, HTTPS/443), Email (SMTP/25, IMAP/143, POP3/110), Database (MySQL/3306, PostgreSQL/5432, MongoDB/27017, Redis/6379), Remote Access (SSH/22, RDP/3389, VNC/5900, Telnet/23), Security (VPN/1194, IPsec/500, TLS/443), File Transfer (FTP/21, SFTP/22, FTPS/990, SMB/445), Development (Docker/2375, Kubernetes/6443, Git/9418), DNS (53), DHCP (67/68), NTP (123), and more.

Each entry displays the port number, the transport protocol (TCP, UDP, or both), the standardized service name as defined by IANA, and a clear description of the service's purpose and common use cases. The search bar filters by port number, service name, or keyword instantly.

The port range reference at the bottom provides orientation: well-known ports (0-1023) require root/admin privileges and are assigned to widely used services, registered ports (1024-49151) are used by vendor applications, and dynamic/private ports (49152-65535) are used for temporary connections.