全球 邮编查询

一、怎么用

• 按地名查：在搜索框输入省、市、区县名（如"海淀区"），或输入至少 3 位邮编（如"100089"）；
• 按层级浏览：先点省份，再点城市，逐级看到下辖区县的邮编；
• 查国外：在下方「美国与欧洲邮编查询」里选国家，输入完整邮编，可反查对应的城市或州。

所有筛选都在浏览器里完成，输入的内容不会发送到服务器。

二、中国邮编的 6 位是怎么排的

中国邮政编码采用六位数字，逐级缩小范围，可以理解成"六层地址"：

位数	含义	举例（100089）
第 1 位	大区（华北、东北、华东…）	1 = 北京及周边
第 2 位	省 / 直辖市	0 = 北京
第 3 位	邮区（通常对应地级市）	0 = 北京城区
第 4 位	县 / 区	0 = 城区范围
第 5-6 位	投递局（所）	89 = 具体投递局

所以"100"开头基本就是北京，看到前两位就能大致判断省份——这是邮编最初的设计意图：让人（和分拣机）不用查表也能快速分流。

三、美国与英国邮编有什么不同

• 美国 ZIP：5 位数字，前 3 位定位到分拣中心，后 2 位定位到邮局；扩展形式 ZIP+4 再加 4 位，精确到街区或大楼。填 5 位即可正常投递。
• 英国：字母数字混合，由"外向码 + 内向码"组成，空格前面部分大致定位到城镇或城区，后面部分定位到街道段。格式比较宽松，但空格位置有讲究。
• 欧洲大陆：多数国家是 4 到 5 位纯数字，需与国家名一起使用，同一个数字在不同国家含义完全不同。

四、这些边界要知道

邮编不等于精确地址。它定位的是投递局或街区范围，不是门牌号。同一栋楼的不同单元可能共用一个邮编。

数据有时效。行政区划调整、新开发区设立都会带来邮编变化。本工具的本地数据来自公开数据集，国际部分基于 GeoNames（CC BY 4.0）；英国、荷兰等国家可能只提供邮编前段。

重要邮件请复核。寄送合同、证件等重要文件前，建议在邮政官方渠道再核对一次收件邮编，本工具适合快速查询与日常参考。

How to use it

• Search by place — type a province, city or district name, or at least three digits of a postcode (e.g. 100089);
• Browse by level — pick a province, then a city, then a district;
• Look abroad — use the US and Europe section below: choose a country, enter the full postcode, and get the matching city or state.

Everything is filtered in your browser; your input is never sent to a server.

How China's six digits are built

A Chinese postcode uses six digits that narrow the address level by level — think of it as a six-layer address:

Digit	Meaning	Example (100089)
1st	Region (North, Northeast, East...)	1 = Beijing area
2nd	Province or municipality	0 = Beijing
3rd	Postal zone, usually a prefecture	0 = urban Beijing
4th	County or district	0 = city core
5th-6th	Delivery office	89 = a specific office

So anything starting with 100 is essentially Beijing: the first two digits already tell you the province, which was the original point — letting people and sorting machines route mail without a lookup table.

How US and UK codes differ

• US ZIP — five digits; the first three locate a sorting centre, the last two a post office. The ZIP+4 extension adds four more digits for a block or a building. Five digits is enough to deliver.
• UK — alphanumeric, an outward code plus an inward code. The part before the space broadly identifies a town or district; the part after narrows to a street segment. The space matters.
• Continental Europe — mostly four or five digits, and meaningless without the country: the same number means different places in different countries.

Limits to keep in mind

A postcode is not an address. It identifies a delivery office or a block, not a door number. Several units in one building can share a single code.

Data ages. Administrative changes and new development areas move postcodes. Local data here comes from public datasets; the international part is based on GeoNames (CC BY 4.0), and some countries — the UK and the Netherlands, for instance — may only expose the leading part of a code.

Double-check anything important. Before sending contracts or documents, confirm the postcode through the postal service's own channel. This tool is for quick lookups and everyday reference.