What's the telephone number of Zhuozhou Railway Station …

The telephone number is the number set by the telephone management department for the telephone. Generally, it consists of 7-8 digits (mobile phone number is 1 1 digit), with 5-6 digits in the early stage.

The designated number set by enterprises, organizations, factories, mines and institutions for internal communication such as fixed telephones or mobile phones is generally 4-8 digits in length. It is also equivalent to the number and name of each mobile phone.

Why is the mobile phone number 1 1 digit?

Reason 1: It is determined by the number format.

3-digit network number +4-digit HLR number +4-digit personal code. This configuration can not only maximize the use of number resources, but also flexibly allocate between operators and regions.

Reason 2: The capacity problem of sectionNo..

Domestic mobile phone numbers are uniformly planned by the Ministry of Information Industry. Originally, it was 10 bit, but due to the continuous growth of users, the number of 10 bit was not enough, so it was upgraded to 1 1 bit. The format of mobile phone number is 1 1 digit in China, which is the longest telephone number in the world. Why 1 1 digit? There is a simple reason.

Because a number combination of 1 1 has hundreds of billions of numbers. And even if the first two digits of "13" are removed, there are 9 digits left, and the number of combinations of 9 digits ranges from 13000000 to 139999999 * * to accommodate1000000. How many people are there in China? The telephone penetration rate of 1 100 million people has not reached 100%, so it is simply not enough.

Even if the future penetration rate reaches 100% or one person has two telephones, if we fix the number "1" in the first place, the capacity of the second place will increase by 100 billion.

After the division, all the number segments starting with "13" have been allocated, and China Unicom has three sub-number segments, namely 130, 13 1 32; China Telecom has a sub-number segment of 1, which is segment 133. This segment is dedicated to the remaining six sub-number segments occupied by CDMA China Mobile, which are segments 134 to 139.

According to the principle of using telecom numbers, it generally reaches 50% of the theoretical capacity, which means that the utilization rate of number resources is close to saturation. According to the analysis of the existing six number segments of China Mobile, the actual upper limit of the number capacity of mobile users should be around 300 million; The upper limit of China Unicom is around 200 million.

Telecom service numbers starting with 10, such as 103 international semi-automatic registration, 10008 international collect call, 10000 telecom service center, 10065438 Unicom service center, 10086 China mobile service. ?

At the beginning of 12, give the civil special number, such as121(weather forecast), 122 (traffic accident alarm, some cities have merged with 1 10).

13 is used to allocate mobile phone numbers, and the allocation: 130- 133 is Unicom, where the segment of 133 is dedicated to telecom CDMA, and the segment after 133 becomes telecom; 134- 139 is mobile.

At the beginning of 15 and 18, there are two 3G segments in the planning of the Ministry of Information Industry. Where 156 and 186 are Unicom 3G (WCDMA); 159 and 188 are mobile (TD-scdma); 153 and 189 are 3G(CDMA 2000/ 1X).