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邮编库网站(youbianku.com)创立于1998年，经过20多年来不断完善和扩展，目前以50多种语言提供全世界上百个国家和地区的邮政编码查询服务。 Postal Code Base website (youbianku.com) was established in 1998, after more than 20 years of continuous improvement and expansion, it currently provides postcode inquiry service around hundreds of countries in 50+ languages.

This website has been providing professional postal code inquiry services for more than 20 years, including arbitrary address postal code inquiry in China, international postal code inquiry. It has also added the new function of geographic location service, street office inquiry, resident committee inquiry, point of interest search by an address, etc.

This website focuses on U.S. zip codes and contains more than 43,000 U.S. zip codes. In addition to zip codes, you can also find other information related to zip codes, such as the population, housing, and economic and social characteristics of a particular zip code. In addition, the site also provides some useful tools to help people find zip codes from different aspects, such as access to geocoding to find my zip code, random addresses, zip code distance calculator, and other tools.