What are the character and length limits for domain name naming?

International English domain name: The domain name is composed of letters (a-z, a-z, upper and lower case equivalent), numbers (0-9) and connectors (-), and real dots (.) are used between domain names at all levelsThe length of the domestic domain name shall not exceed 20 characters; The international domain name is 63 characters.

Note: The connector (-) cannot be used as the first or last character of a domain name. International Chinese domain name: If you include the domain name ending com, net and org, the encoding (note that it is encoding) of a Chinese domain name can be 67 characters.

These encoded characters may be letters, numbers, or hyphens. Therefore, a Chinese domain name can have up to 31 Chinese characters. Chinese international domain names are divided into simplified and traditional Chinese, which are two different Chinese internationalized domain names, so they must be registered separately, each with different target groups, Chinese Simplified Chinese is mainly for Chinese mainland, while Chinese Traditional is mainly used for Chinese users in Hong Kong, Taiwan or other countries.

Therefore, please choose to register according to the target region in order to protect your online trademark. Domestic English domain name: The domain name can be composed of letters (a-z, a-z, upper and lower case equivalent), numbers (0-9) and connectors (-), and the real dot (.) is used between domain names at all levels

connection, the length of the ccTLD must not exceed 20 characters (not included). Chinese generic domain name (domestic Chinese domain name): The Chinese generic domain name is launched and managed by CNNIC (China Internet Information Center)."Chinese.

cn.China. Firm.

Networking"Format of the domain name. Chinese generic domain names must be within 30 characters in length, and Chinese, English, Arabic numerals, and Arabic numerals are allowed"-\"characters such as signs; Chinese generic domain names are compatible with simplified and traditional characters, and there is no need for repeated registration. Universal**:

It can be composed of Chinese, letters (a-z, a-z, upper and lower case equivalent), numbers (0-9) or symbols (-, up to 31 characters (common ** Each constituent element is treated as one character).

Detailed naming conventions for domain names:

1. Only English letters (a-z, case-insensitive), numbers (0-9), and"-"(hyphens, i.e., hyphens), spaces and special characters (e.g., !) cannot be used. , $, etc.).

2、"-"Cannot be used as a beginning and end.

3. The length cannot exceed 63 characters.

4. Simple, easy to remember, and logical (consistent with the company's trademark and product name; According to the nature of the **, the use of the choice).

5. Register multiple different suffixes for the same domain name (it can be used to ensure the uniqueness of the company's brand, and it can also make it easier for Internet users to find your**).

6. Choose more than 2 years for the purchase period of the domain name (reduce the risk of losing the domain name, and at the same time avoid the economic loss caused by the domain name **** in the future, and you can also enjoy discounts for multi-year purchases).

Hope it helps.

val().length The length of the character obtained in this way is not practical, for example, Chinese characters cannot be recognized as 2....method, count the number of bytes of the string { return ,.}

The length of a domain name refers to the number of characters.

For example, a one-letter or one-number domain name.

For example, a domain name with n letters.

Look up how many characters. It's the length of the domain name.

It's too long to remember, it's better to be shorter.