What is LDAP Port number?

LDAP is short for Lightweight Directory Access Protocol. It is an Application Layer Protocol and default port number is389.

A client starts an LDAP session by connecting to an LDAP server, called a Directory System Agent (DSA), by default on TCP and UDP port 389, or on port 636 for LDAPS. Global Catalog is available by default on ports 3268, and 3269 for LDAPS.

By default on TCP and UDP port 389, or on port 636 for LDAPS. Global Catalog is available by default on ports3268, and3269 for LDAPS