番号

1. Origins, structure, and basic meaning

• Structure: 番号 (ばんごう) is a number used for identification or order. The examples use a standalone number and compound 追跡番号.
• Basic usage: A reception number determines when someone is called; a tracking number identifies a package in transit.

2. Common pitfalls and similar expressions

• Queue number and package-tracking identifier
  • The first number organizes calling order; the second uniquely supports logistics lookup. Prefix 追跡 specifies the number's function.