关于IP地址2进制、10进制、16进制的说明
关于网络号、主机号及A/B/C/D/E类IP的说明
A类IP地址是指：在IP地址的四段号码（例如：字节1.字节2.字节3.字节4）中，第一段号码（字节1）为网络号码，剩下的后三段号码（字节2.字节3.字节4）为本地计算机的号码。
如果用二进制表示IP地址的话，A类IP地址就由1字节的网络地址和3字节主机地址组成，网络地址的最高位必须是'0'。
A类IP地址范围：1.0.0.0 ~ 127.255.255.255，可用IP地址范围：1.0.0.1 ~ 127.255.255.254。
A类IP地址中网络的标识长度为7位，主机标识的长度为24位，A类网络地址数量较少（2 ^ 7 - 2 = 126个），可以用于容纳1600多万计算机的大型网络（2 ^ 24 - 2 = 16777214个）。
如果您需要了解A类IP段更详细的IP地址信息，请点击A类IP地址列表中的标题链接。
0.*.*.*(0.0.0.0 - 0.255.255.255)
1.*.*.*(1.0.0.0 - 1.255.255.255)
2.*.*.*(2.0.0.0 - 2.255.255.255)
3.*.*.*(3.0.0.0 - 3.255.255.255)
4.*.*.*(4.0.0.0 - 4.255.255.255)
5.*.*.*(5.0.0.0 - 5.255.255.255)
6.*.*.*(6.0.0.0 - 6.255.255.255)
7.*.*.*(7.0.0.0 - 7.255.255.255)
8.*.*.*(8.0.0.0 - 8.255.255.255)
9.*.*.*(9.0.0.0 - 9.255.255.255)
10.*.*.*(10.0.0.0 - 10.255.255.255)
11.*.*.*(11.0.0.0 - 11.255.255.255)
12.*.*.*(12.0.0.0 - 12.255.255.255)
13.*.*.*(13.0.0.0 - 13.255.255.255)
14.*.*.*(14.0.0.0 - 14.255.255.255)
15.*.*.*(15.0.0.0 - 15.255.255.255)
16.*.*.*(16.0.0.0 - 16.255.255.255)
17.*.*.*(17.0.0.0 - 17.255.255.255)
18.*.*.*(18.0.0.0 - 18.255.255.255)
19.*.*.*(19.0.0.0 - 19.255.255.255)
20.*.*.*(20.0.0.0 - 20.255.255.255)
21.*.*.*(21.0.0.0 - 21.255.255.255)
22.*.*.*(22.0.0.0 - 22.255.255.255)
23.*.*.*(23.0.0.0 - 23.255.255.255)
24.*.*.*(24.0.0.0 - 24.255.255.255)
25.*.*.*(25.0.0.0 - 25.255.255.255)
26.*.*.*(26.0.0.0 - 26.255.255.255)
27.*.*.*(27.0.0.0 - 27.255.255.255)
28.*.*.*(28.0.0.0 - 28.255.255.255)
29.*.*.*(29.0.0.0 - 29.255.255.255)
30.*.*.*(30.0.0.0 - 30.255.255.255)
31.*.*.*(31.0.0.0 - 31.255.255.255)
32.*.*.*(32.0.0.0 - 32.255.255.255)
33.*.*.*(33.0.0.0 - 33.255.255.255)
34.*.*.*(34.0.0.0 - 34.255.255.255)
35.*.*.*(35.0.0.0 - 35.255.255.255)
36.*.*.*(36.0.0.0 - 36.255.255.255)
37.*.*.*(37.0.0.0 - 37.255.255.255)
38.*.*.*(38.0.0.0 - 38.255.255.255)
39.*.*.*(39.0.0.0 - 39.255.255.255)
40.*.*.*(40.0.0.0 - 40.255.255.255)
41.*.*.*(41.0.0.0 - 41.255.255.255)
42.*.*.*(42.0.0.0 - 42.255.255.255)
43.*.*.*(43.0.0.0 - 43.255.255.255)
44.*.*.*(44.0.0.0 - 44.255.255.255)
45.*.*.*(45.0.0.0 - 45.255.255.255)
46.*.*.*(46.0.0.0 - 46.255.255.255)
47.*.*.*(47.0.0.0 - 47.255.255.255)
48.*.*.*(48.0.0.0 - 48.255.255.255)
49.*.*.*(49.0.0.0 - 49.255.255.255)
50.*.*.*(50.0.0.0 - 50.255.255.255)
51.*.*.*(51.0.0.0 - 51.255.255.255)
52.*.*.*(52.0.0.0 - 52.255.255.255)
53.*.*.*(53.0.0.0 - 53.255.255.255)
54.*.*.*(54.0.0.0 - 54.255.255.255)
55.*.*.*(55.0.0.0 - 55.255.255.255)
56.*.*.*(56.0.0.0 - 56.255.255.255)
57.*.*.*(57.0.0.0 - 57.255.255.255)
58.*.*.*(58.0.0.0 - 58.255.255.255)
59.*.*.*(59.0.0.0 - 59.255.255.255)
60.*.*.*(60.0.0.0 - 60.255.255.255)
61.*.*.*(61.0.0.0 - 61.255.255.255)
62.*.*.*(62.0.0.0 - 62.255.255.255)
63.*.*.*(63.0.0.0 - 63.255.255.255)
64.*.*.*(64.0.0.0 - 64.255.255.255)
65.*.*.*(65.0.0.0 - 65.255.255.255)
66.*.*.*(66.0.0.0 - 66.255.255.255)
67.*.*.*(67.0.0.0 - 67.255.255.255)
68.*.*.*(68.0.0.0 - 68.255.255.255)
69.*.*.*(69.0.0.0 - 69.255.255.255)
70.*.*.*(70.0.0.0 - 70.255.255.255)
71.*.*.*(71.0.0.0 - 71.255.255.255)
72.*.*.*(72.0.0.0 - 72.255.255.255)
73.*.*.*(73.0.0.0 - 73.255.255.255)
74.*.*.*(74.0.0.0 - 74.255.255.255)
75.*.*.*(75.0.0.0 - 75.255.255.255)
76.*.*.*(76.0.0.0 - 76.255.255.255)
77.*.*.*(77.0.0.0 - 77.255.255.255)
78.*.*.*(78.0.0.0 - 78.255.255.255)
79.*.*.*(79.0.0.0 - 79.255.255.255)
80.*.*.*(80.0.0.0 - 80.255.255.255)
81.*.*.*(81.0.0.0 - 81.255.255.255)
82.*.*.*(82.0.0.0 - 82.255.255.255)
83.*.*.*(83.0.0.0 - 83.255.255.255)
84.*.*.*(84.0.0.0 - 84.255.255.255)
85.*.*.*(85.0.0.0 - 85.255.255.255)
86.*.*.*(86.0.0.0 - 86.255.255.255)
87.*.*.*(87.0.0.0 - 87.255.255.255)
88.*.*.*(88.0.0.0 - 88.255.255.255)
89.*.*.*(89.0.0.0 - 89.255.255.255)
90.*.*.*(90.0.0.0 - 90.255.255.255)
91.*.*.*(91.0.0.0 - 91.255.255.255)
92.*.*.*(92.0.0.0 - 92.255.255.255)
93.*.*.*(93.0.0.0 - 93.255.255.255)
94.*.*.*(94.0.0.0 - 94.255.255.255)
95.*.*.*(95.0.0.0 - 95.255.255.255)
96.*.*.*(96.0.0.0 - 96.255.255.255)
97.*.*.*(97.0.0.0 - 97.255.255.255)
98.*.*.*(98.0.0.0 - 98.255.255.255)
99.*.*.*(99.0.0.0 - 99.255.255.255)
100.*.*.*(100.0.0.0 - 100.255.255.255)
101.*.*.*(101.0.0.0 - 101.255.255.255)
102.*.*.*(102.0.0.0 - 102.255.255.255)
103.*.*.*(103.0.0.0 - 103.255.255.255)
104.*.*.*(104.0.0.0 - 104.255.255.255)
105.*.*.*(105.0.0.0 - 105.255.255.255)
106.*.*.*(106.0.0.0 - 106.255.255.255)
107.*.*.*(107.0.0.0 - 107.255.255.255)
108.*.*.*(108.0.0.0 - 108.255.255.255)
109.*.*.*(109.0.0.0 - 109.255.255.255)
110.*.*.*(110.0.0.0 - 110.255.255.255)
111.*.*.*(111.0.0.0 - 111.255.255.255)
112.*.*.*(112.0.0.0 - 112.255.255.255)
113.*.*.*(113.0.0.0 - 113.255.255.255)
114.*.*.*(114.0.0.0 - 114.255.255.255)
115.*.*.*(115.0.0.0 - 115.255.255.255)
116.*.*.*(116.0.0.0 - 116.255.255.255)
117.*.*.*(117.0.0.0 - 117.255.255.255)
118.*.*.*(118.0.0.0 - 118.255.255.255)
119.*.*.*(119.0.0.0 - 119.255.255.255)
120.*.*.*(120.0.0.0 - 120.255.255.255)
121.*.*.*(121.0.0.0 - 121.255.255.255)
122.*.*.*(122.0.0.0 - 122.255.255.255)
123.*.*.*(123.0.0.0 - 123.255.255.255)
124.*.*.*(124.0.0.0 - 124.255.255.255)
125.*.*.*(125.0.0.0 - 125.255.255.255)
126.*.*.*(126.0.0.0 - 126.255.255.255)
127.*.*.*(127.0.0.0 - 127.255.255.255)
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