快递单号英语怎么说

快递单号在英语中被称为"tracking number"，它的来源可能源于快递公司通过跟踪这个号码来跟踪包裹的运送状态。

一些英文例句：

Can you please provide me with the tracking number for my package?
The tracking number for my package is XYZ12345.
I've checked the tracking number and it looks like my package has been delivered.