How can I know who sent me something?

1. Take mobile phone number query logistics as an example. Take out your mobile phone first, click Alipay in your mobile phone, find the option of my express delivery on the main page of Alipay, and choose to manually click to enter. As shown in the figure

2. After loading the "My Express" page, manually select three points in the upper right corner of the mobile phone page. As shown in the figure

3. After clicking, in the displayed options bar, manually click an option "Manage Authorization". As shown in the figure

4. Later, you can see that in the authorization interface, manually click the screen and select Add Mobile Number on the page. As shown in the figure

5. Enter the mobile phone number to be queried with the mobile phone keyboard, and click Send Check Code.

6. When your mobile phone receives the short message, enter the received check code correctly, and manually click the Confirm Add button. As shown in the figure

7. Query after adding the mobile phone number successfully, and the page will display the courier information of the mobile phone number. As shown in the figure

Extended data:

Generalized fast query

Generalized express query mainly refers to node-based query mode and express tracking query mode based on general wireless packet switching technology. These two express query methods are to determine the location of express delivery through specific technology, dynamically update it through the Internet and provide users with real-time query without geographical restrictions.

Node-based query mode

Express inquiry based on bar code is mainly to assign a bar code to each express. Whenever the express train passes through the transit node, its position is re-marked and updated in the database. Express delivery can be inquired through the internet. Shentong Express belongs to this technology.

Query mode based on wireless technology

In this method, the express freight information center sends instructions to the recipient's handheld terminal, and the recipient collects the express mail in time. The client signs on the dispatcher's handheld terminal, and the handheld terminal converts the client's signature into an electronic picture in real time, and transmits it to the website for storage through the wireless network. At the same time, the handheld terminal device automatically calculates the express freight. After scanning, the page information is stored in the special website of the courier company. The shipper or consignee directly uses the voucher number of the freight receipt to inquire or download the withdrawal information of the voucher.

References:

Baidu encyclopedia-quick query