Postal code query method:
1, official website.
Open the post, official website. If you don't know, you can go to Baidu China Post website and find "Postal Code Inquiry".
2, through the postal code daquan query.
Enter query information to find postal code, etc.
3. Call the enquiry service number, such as 1 14 or 12580.
4. Apply for inquiry through postal code.
Open Baidu's mobile phone application, search for "postcode query", download related postcode applications, and you can query anytime and anywhere.