What is the significance of mobile phone number protection?

Protect mobile phone numbers from disclosure and harassment.

The number used in China is 1 1, in which each segment has a different coding direction:1-3-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, and it adopts E. 164 coding mode; Stored in HLR and VLR, and transmitted on the map interface. The structure of MDN number is as follows: CC+MAC+H0 H 1 H2 H3+ABCD, where CC is the country code and China uses 86. MAC: mobile access code. This website adopts the network number scheme, 133. H0h 1H2H3: HLR identification code, which is uniformly distributed by operators. ABCD: Mobile subscriber number, which is assigned by each HLR.