Method for quickly classifying IP addresses

The invention discloses a method for quickly classifying IP addresses, and the method comprises the following steps: 1, unifying the format of a network segment and its identifier as a key-value pair;2, performing the equivalent splitting of the key-value pair at step 1 according to a rule and merging the split parts into a key-value pair group: setting the length of a subnet mask as X, wherein Xis between 0 and 32, and according to the difference of the length X, the subnet is split based on the following rules: splitting the subnet into 232-X 32-bit subnets if X is between 25 and 32; splitting the subnet into 224-X 24-bit subnets if X is between 17 and 24; splitting the subnet into 216- X 16-bit subnets if X is between 9 and 16; splitting the subnet into 28-X 8-bit subnets if X is between 1 and 8; 3, sequentially querying a target IP according to the codes based on the key value at step 2. 本发明公开了种对IP地址进行快速分类的方法，包括如下步骤：步骤1，统网段及其标识的格式为键值对的形式；步骤2，按规则等价拆分步骤1的键值对，并合并为键值对组：设定子网掩码长度为X，X介于0到32之间，按X长度的不同，遵循以下规则对子网进行