您在這裡
IP 地址列表: 21.133.197.* (21.133.197.0 - 21.133.197.254)
這是第壹個字節為21,第二個字節為133,第三個字節為197,第四個字節在0 - 255之間的IP地址列表,表示為21.133.197.* (21.133.197.0 - 21.133.197.255)。
這個IP地址列表中包含256個IP地址,我們以其中壹個IP地址21.133.197.1為例,來描述這個IP的屬性:
但這只是其中1個IP地址的例子,並不代表這個列表中所有的IP地址都有同樣的屬性,如果需要了解其它IP和更詳細的IP地址段信息,請點擊下面列表中的標題鏈接。

內容:
2. A類IP地址列表
A類IP地址是指:在IP地址的四段號碼(例如:字節1.字節2.字節3.字節4)中,第壹段號碼(字節1)為網絡號碼,剩下的後三段號碼(字節2.字節3.字節4)為本地計算機的號碼。
如果用二進制表示IP地址的話,A類IP地址就由1字節的網絡地址和3字節主機地址組成,網絡地址的最高位必須是'0'。
A類IP地址範圍:1.0.0.0 ~ 127.255.255.255,可用IP地址範圍:1.0.0.1 ~ 127.255.255.254。
A類IP地址中網絡的標識長度為7位,主機標識的長度為24位,A類網絡地址數量較少(2 ^ 7 - 2 = 126個),可以用於容納1600多萬計算機的大型網絡(2 ^ 24 - 2 = 16777214個)。
如果您需要了解A類IP段更詳細的IP地址信息,請點擊A類IP地址列表中的標題鏈接。
- 21.133.197.0
- 21.133.197.1
- 21.133.197.2
- 21.133.197.3
- 21.133.197.4
- 21.133.197.5
- 21.133.197.6
- 21.133.197.7
- 21.133.197.8
- 21.133.197.9
- 21.133.197.10
- 21.133.197.11
- 21.133.197.12
- 21.133.197.13
- 21.133.197.14
- 21.133.197.15
- 21.133.197.16
- 21.133.197.17
- 21.133.197.18
- 21.133.197.19
- 21.133.197.20
- 21.133.197.21
- 21.133.197.22
- 21.133.197.23
- 21.133.197.24
- 21.133.197.25
- 21.133.197.26
- 21.133.197.27
- 21.133.197.28
- 21.133.197.29
- 21.133.197.30
- 21.133.197.31
- 21.133.197.32
- 21.133.197.33
- 21.133.197.34
- 21.133.197.35
- 21.133.197.36
- 21.133.197.37
- 21.133.197.38
- 21.133.197.39
- 21.133.197.40
- 21.133.197.41
- 21.133.197.42
- 21.133.197.43
- 21.133.197.44
- 21.133.197.45
- 21.133.197.46
- 21.133.197.47
- 21.133.197.48
- 21.133.197.49
- 21.133.197.50
- 21.133.197.51
- 21.133.197.52
- 21.133.197.53
- 21.133.197.54
- 21.133.197.55
- 21.133.197.56
- 21.133.197.57
- 21.133.197.58
- 21.133.197.59
- 21.133.197.60
- 21.133.197.61
- 21.133.197.62
- 21.133.197.63
- 21.133.197.64
- 21.133.197.65
- 21.133.197.66
- 21.133.197.67
- 21.133.197.68
- 21.133.197.69
- 21.133.197.70
- 21.133.197.71
- 21.133.197.72
- 21.133.197.73
- 21.133.197.74
- 21.133.197.75
- 21.133.197.76
- 21.133.197.77
- 21.133.197.78
- 21.133.197.79
- 21.133.197.80
- 21.133.197.81
- 21.133.197.82
- 21.133.197.83
- 21.133.197.84
- 21.133.197.85
- 21.133.197.86
- 21.133.197.87
- 21.133.197.88
- 21.133.197.89
- 21.133.197.90
- 21.133.197.91
- 21.133.197.92
- 21.133.197.93
- 21.133.197.94
- 21.133.197.95
- 21.133.197.96
- 21.133.197.97
- 21.133.197.98
- 21.133.197.99
- 21.133.197.100
- 21.133.197.101
- 21.133.197.102
- 21.133.197.103
- 21.133.197.104
- 21.133.197.105
- 21.133.197.106
- 21.133.197.107
- 21.133.197.108
- 21.133.197.109
- 21.133.197.110
- 21.133.197.111
- 21.133.197.112
- 21.133.197.113
- 21.133.197.114
- 21.133.197.115
- 21.133.197.116
- 21.133.197.117
- 21.133.197.118
- 21.133.197.119
- 21.133.197.120
- 21.133.197.121
- 21.133.197.122
- 21.133.197.123
- 21.133.197.124
- 21.133.197.125
- 21.133.197.126
- 21.133.197.127
- 21.133.197.128
- 21.133.197.129
- 21.133.197.130
- 21.133.197.131
- 21.133.197.132
- 21.133.197.133
- 21.133.197.134
- 21.133.197.135
- 21.133.197.136
- 21.133.197.137
- 21.133.197.138
- 21.133.197.139
- 21.133.197.140
- 21.133.197.141
- 21.133.197.142
- 21.133.197.143
- 21.133.197.144
- 21.133.197.145
- 21.133.197.146
- 21.133.197.147
- 21.133.197.148
- 21.133.197.149
- 21.133.197.150
- 21.133.197.151
- 21.133.197.152
- 21.133.197.153
- 21.133.197.154
- 21.133.197.155
- 21.133.197.156
- 21.133.197.157
- 21.133.197.158
- 21.133.197.159
- 21.133.197.160
- 21.133.197.161
- 21.133.197.162
- 21.133.197.163
- 21.133.197.164
- 21.133.197.165
- 21.133.197.166
- 21.133.197.167
- 21.133.197.168
- 21.133.197.169
- 21.133.197.170
- 21.133.197.171
- 21.133.197.172
- 21.133.197.173
- 21.133.197.174
- 21.133.197.175
- 21.133.197.176
- 21.133.197.177
- 21.133.197.178
- 21.133.197.179
- 21.133.197.180
- 21.133.197.181
- 21.133.197.182
- 21.133.197.183
- 21.133.197.184
- 21.133.197.185
- 21.133.197.186
- 21.133.197.187
- 21.133.197.188
- 21.133.197.189
- 21.133.197.190
- 21.133.197.191
- 21.133.197.192
- 21.133.197.193
- 21.133.197.194
- 21.133.197.195
- 21.133.197.196
- 21.133.197.197
- 21.133.197.198
- 21.133.197.199
- 21.133.197.200
- 21.133.197.201
- 21.133.197.202
- 21.133.197.203
- 21.133.197.204
- 21.133.197.205
- 21.133.197.206
- 21.133.197.207
- 21.133.197.208
- 21.133.197.209
- 21.133.197.210
- 21.133.197.211
- 21.133.197.212
- 21.133.197.213
- 21.133.197.214
- 21.133.197.215
- 21.133.197.216
- 21.133.197.217
- 21.133.197.218
- 21.133.197.219
- 21.133.197.220
- 21.133.197.221
- 21.133.197.222
- 21.133.197.223
- 21.133.197.224
- 21.133.197.225
- 21.133.197.226
- 21.133.197.227
- 21.133.197.228
- 21.133.197.229
- 21.133.197.230
- 21.133.197.231
- 21.133.197.232
- 21.133.197.233
- 21.133.197.234
- 21.133.197.235
- 21.133.197.236
- 21.133.197.237
- 21.133.197.238
- 21.133.197.239
- 21.133.197.240
- 21.133.197.241
- 21.133.197.242
- 21.133.197.243
- 21.133.197.244
- 21.133.197.245
- 21.133.197.246
- 21.133.197.247
- 21.133.197.248
- 21.133.197.249
- 21.133.197.250
- 21.133.197.251
- 21.133.197.252
- 21.133.197.253
- 21.133.197.254
- 21.133.197.255