Why is the mobile phone number 1 1 digit?

Because the number of the mobile phone number has a specific function, it cannot be short.

Each segment of the number 1 1 has a different coding direction: the first three digits-the network identification number; 4th-7th digits-area code; Number 8- 1 1- user number. This number is the so-called MDN number, that is, the number that the calling user needs to dial when calling the mobile user of this network. It adopts E. 164 coding.

Code mode; Stored in HLR and VLR, and transmitted on the map interface.

Since 0: 00 on July 22nd, 1999, the number of digital mobile phones in China has increased to 1 1. This upgrade must take at least a few firsts: the first national telephone number upgrade in China, the first mobile phone upgrade in China, the largest number upgrade in the world, and the future of China.

It is the first country with 1 1 digit since the establishment of ITU.

Extended data:

Friendly reminder:

① backup phone book

Some people have too many important customers in their mobile phone address book, but they neglect it, and they don't know it's too late until they throw away their old cards. In addition, it is best to save the old card after replacing the mobile phone card to avoid being used by others.

② The mobile phone number does not need to be cancelled in time.

Some friends directly abandon the old mobile phone card when they change their mobile phone numbers, thinking that they will automatically close and cancel as long as they are not used. In fact, although it will be cancelled automatically, it will take several months. During this period, the system will automatically deduct the monthly rent.

Fees, until cancelled. The mobile phone is connected with the user's credit. Please cancel in time so as to handle business or banking business in the future.

③ Replace the bank card binding.

After the mobile phone number is changed, it is necessary to modify the passwords of various bank cards and credit cards bound to it as soon as possible. You can also log in to online banking to modify online banking account information and change your mobile phone number. If you have stopped selling numbers, you can only go to the bank business hall with your bank card and ID card.

④ Change QQ number and WeChat binding.

Many people log in to QQ and WeChat directly through their mobile phone numbers. It is recommended to complete the rebinding online before changing the mobile phone number.

⑤ Replace application bindings such as Taobao and Alipay.

You can change the bound mobile phone number directly from the website. Taking Taobao as an example, changing the new mobile phone number requires the verification code of the original bound mobile phone. If you can't receive the verification code, you can only apply for mailbox replacement or contact customer service to modify it.

⑥ Change Weibo binding.

Take Sina Weibo as an example. Just enter the account security-mobile phone number-edit-change the mobile phone number on Weibo's homepage.

⑦ Change the mailbox binding.

⑧ Change the railway ticket registration information of Ministry of Railways 12306 in official website.

Pet-name ruby member information change

Some supermarket credit cards, daily chemical store credit cards, directly say the mobile phone number, involving points, you can enjoy the discount. Please also remember to replace it in time.

References:

Baidu encyclopedia-mobile phone number