What are the coding rules for cell phone numbers?

Cell phone number rules

1, at present, China's 2G (second-generation mobile communication technology) mobile communication number segment allocation has been basically finalized, the number segment beginning with 13 has been issued all. Among them, the 134~139 number segment basically belongs to China Mobile. Unicom accounted for four number segments, from 130 ~ 133 number segments, of which 133 number segments for Unicom CDMA dedicated, and determine the future use of cell phone numbers number segments may be 15 and 18 to start.

2, cell phone and telephone number composition

It is reported that China is currently using the cell phone number for the 11-bit, of which the segments have different coding direction:

The first 3: network identification number 4 to 7: area code 8 to 11: user number telephone number coding rules:

Country code + area code + telephone number (service provider) Code + 4-digit subscriber number)

Where the service provider code -

Landline telephone number is set by the telecommunication department.

All references come from,

Extended Information

The cell phone number in China is unified by the Ministry of Information Industry. Originally 10-digit, due to the continuous growth of users, 10-digit numbers were not enough to use, so they were upgraded to 11-digit.

Why 11 digits, on the one hand, is determined by the number format, on the other hand, is the above mentioned number segment capacity.

The current format of a cell phone number is a 3-digit network number + a 4-digit HLR number + a 4-digit personal code,

Numbering segment, the first 3 digits are assigned to the operator, the next 4 digits are assigned to the region, and the last 4 digits are assigned to the number

Numbering segment, the last 4 digits, from 0000 to 9999