Postal Code Lookup

Postal Code Lookup

This postal code lookup tool provides quick searches for postal codes in mainland China. Enter a city name to find its commonly used postal code, or enter a 6-digit postal code to identify the corresponding city or region.

How to use the postal code lookup

Enter a city, district, or county name in the search box. The system performs approximate matching and displays the corresponding postal codes. You can also enter a 6-digit postal code directly for reverse lookup.

Search by city

City search allows you to quickly find the commonly used postal code for major cities. Results include the province, city, and corresponding postal code.

Reverse lookup by postal code

Enter a 6-digit postal code to identify the associated city or region. This is useful when you only know the postal code and need to determine its administrative area.

Search by province

Postal codes are organized by province for convenient browsing. Select a province to view its major cities and postal codes.

What is a postal code?

A postal code is a numeric code used to facilitate mail sorting and delivery. In mainland China, commonly used postal codes contain six digits.

Why can one city have multiple postal codes?

A city may contain multiple districts, counties, and postal delivery areas, so different areas can use different postal codes. A general city postal code does not necessarily apply to every subordinate area.

Relationship with administrative divisions

Postal codes and administrative divisions are not exactly equivalent. This tool mainly organizes information according to national administrative divisions and commonly used postal codes.

Data and accuracy

The data is based on the national administrative divisions of 2023 and covers major cities, districts, and counties in mainland China. Administrative or postal code changes may cause differences, so the results should be treated as reference information.

Frequently asked questions

Can a postal code identify an exact address?

No. A postal code normally represents a postal delivery area and cannot by itself identify an exact residential address or the personal information of a recipient.

Is a postal code the same as a telephone area code?

No. Postal codes are mainly used for mail delivery, while telephone area codes are used for long-distance calls.

Can personal information be found using a postal code?

No. This tool only provides public information related to postal codes and regions and does not provide names, phone numbers, personal addresses, or other private information.