The naming rules for domestic English domain names and other English domain names are the same.

Since domain names at all levels on the Internet are managed by different organizations, the ways in which each organization manages domain names and the rules for naming domain names are also different. However, there are also some different rules for naming domain names, mainly as follows:

1. The domain name can only contain the following characters:

1. 26 English letters

2. "0, 1, 2, 3, 4, 5, 6, 7, 8, 9" ten numbers

3. "-" (the hyphen in English )

2. Combination rules of characters in domain names:

1. In domain names, English letters are not case-sensitive

2. For a domain name There is a certain limit on the length

The rules for domain name naming under cn are:

1. Follow all the same rules for domain name naming

2. Only A third-level domain name can be registered. The third-level domain name is composed of letters (a-0z, a-z, upper and lower case equivalent), numbers (0-9) and connectors (-). Domain names at all levels are connected with dots (.) , the length of the third-level domain name shall not exceed 20 characters;

3. The following names shall not be used, or the use is restricted (the following table lists some materials that need to be provided when registering such domain names):

1) Registration contains "china", "chinese", "cn", "national", etc.

Officially approved by relevant national departments (referring to units above the ministerial level)

2) The names of other countries or regions, foreign place names, and names of international organizations known to the public may not be used

3) The full names or abbreviations of administrative division names above the county level (including county level)

Officially approved by the relevant people's government at or above the county level (including county level)

4) Industry names or common names of goods may not be used

5) Business names that have been registered by others in China or Trademark names shall not be used

6) Names that are harmful to the interests of the country, society or the public shall not be used

7) Official approval from relevant national departments (referring to units at the ministerial level or above) Approval and formal approval from the relevant people's governments at or above the county level (including county level) means that the relevant agencies must issue written documents expressing their consent for xxxx unit to register the xxx domain name. For example, if you want to apply for the domain name beijing.com.cn, you must provide the approval document from the Beijing Municipal People's Government.