您在這裡
IP 地址列表: 21.230.203.* (21.230.203.0 - 21.230.203.254)
這是第壹個字節為21,第二個字節為230,第三個字節為203,第四個字節在0 - 255之間的IP地址列表,表示為21.230.203.* (21.230.203.0 - 21.230.203.255)。
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21.230.203.1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。
- 21.230.203.0
- 21.230.203.1
- 21.230.203.2
- 21.230.203.3
- 21.230.203.4
- 21.230.203.5
- 21.230.203.6
- 21.230.203.7
- 21.230.203.8
- 21.230.203.9
- 21.230.203.10
- 21.230.203.11
- 21.230.203.12
- 21.230.203.13
- 21.230.203.14
- 21.230.203.15
- 21.230.203.16
- 21.230.203.17
- 21.230.203.18
- 21.230.203.19
- 21.230.203.20
- 21.230.203.21
- 21.230.203.22
- 21.230.203.23
- 21.230.203.24
- 21.230.203.25
- 21.230.203.26
- 21.230.203.27
- 21.230.203.28
- 21.230.203.29
- 21.230.203.30
- 21.230.203.31
- 21.230.203.32
- 21.230.203.33
- 21.230.203.34
- 21.230.203.35
- 21.230.203.36
- 21.230.203.37
- 21.230.203.38
- 21.230.203.39
- 21.230.203.40
- 21.230.203.41
- 21.230.203.42
- 21.230.203.43
- 21.230.203.44
- 21.230.203.45
- 21.230.203.46
- 21.230.203.47
- 21.230.203.48
- 21.230.203.49
- 21.230.203.50
- 21.230.203.51
- 21.230.203.52
- 21.230.203.53
- 21.230.203.54
- 21.230.203.55
- 21.230.203.56
- 21.230.203.57
- 21.230.203.58
- 21.230.203.59
- 21.230.203.60
- 21.230.203.61
- 21.230.203.62
- 21.230.203.63
- 21.230.203.64
- 21.230.203.65
- 21.230.203.66
- 21.230.203.67
- 21.230.203.68
- 21.230.203.69
- 21.230.203.70
- 21.230.203.71
- 21.230.203.72
- 21.230.203.73
- 21.230.203.74
- 21.230.203.75
- 21.230.203.76
- 21.230.203.77
- 21.230.203.78
- 21.230.203.79
- 21.230.203.80
- 21.230.203.81
- 21.230.203.82
- 21.230.203.83
- 21.230.203.84
- 21.230.203.85
- 21.230.203.86
- 21.230.203.87
- 21.230.203.88
- 21.230.203.89
- 21.230.203.90
- 21.230.203.91
- 21.230.203.92
- 21.230.203.93
- 21.230.203.94
- 21.230.203.95
- 21.230.203.96
- 21.230.203.97
- 21.230.203.98
- 21.230.203.99
- 21.230.203.100
- 21.230.203.101
- 21.230.203.102
- 21.230.203.103
- 21.230.203.104
- 21.230.203.105
- 21.230.203.106
- 21.230.203.107
- 21.230.203.108
- 21.230.203.109
- 21.230.203.110
- 21.230.203.111
- 21.230.203.112
- 21.230.203.113
- 21.230.203.114
- 21.230.203.115
- 21.230.203.116
- 21.230.203.117
- 21.230.203.118
- 21.230.203.119
- 21.230.203.120
- 21.230.203.121
- 21.230.203.122
- 21.230.203.123
- 21.230.203.124
- 21.230.203.125
- 21.230.203.126
- 21.230.203.127
- 21.230.203.128
- 21.230.203.129
- 21.230.203.130
- 21.230.203.131
- 21.230.203.132
- 21.230.203.133
- 21.230.203.134
- 21.230.203.135
- 21.230.203.136
- 21.230.203.137
- 21.230.203.138
- 21.230.203.139
- 21.230.203.140
- 21.230.203.141
- 21.230.203.142
- 21.230.203.143
- 21.230.203.144
- 21.230.203.145
- 21.230.203.146
- 21.230.203.147
- 21.230.203.148
- 21.230.203.149
- 21.230.203.150
- 21.230.203.151
- 21.230.203.152
- 21.230.203.153
- 21.230.203.154
- 21.230.203.155
- 21.230.203.156
- 21.230.203.157
- 21.230.203.158
- 21.230.203.159
- 21.230.203.160
- 21.230.203.161
- 21.230.203.162
- 21.230.203.163
- 21.230.203.164
- 21.230.203.165
- 21.230.203.166
- 21.230.203.167
- 21.230.203.168
- 21.230.203.169
- 21.230.203.170
- 21.230.203.171
- 21.230.203.172
- 21.230.203.173
- 21.230.203.174
- 21.230.203.175
- 21.230.203.176
- 21.230.203.177
- 21.230.203.178
- 21.230.203.179
- 21.230.203.180
- 21.230.203.181
- 21.230.203.182
- 21.230.203.183
- 21.230.203.184
- 21.230.203.185
- 21.230.203.186
- 21.230.203.187
- 21.230.203.188
- 21.230.203.189
- 21.230.203.190
- 21.230.203.191
- 21.230.203.192
- 21.230.203.193
- 21.230.203.194
- 21.230.203.195
- 21.230.203.196
- 21.230.203.197
- 21.230.203.198
- 21.230.203.199
- 21.230.203.200
- 21.230.203.201
- 21.230.203.202
- 21.230.203.203
- 21.230.203.204
- 21.230.203.205
- 21.230.203.206
- 21.230.203.207
- 21.230.203.208
- 21.230.203.209
- 21.230.203.210
- 21.230.203.211
- 21.230.203.212
- 21.230.203.213
- 21.230.203.214
- 21.230.203.215
- 21.230.203.216
- 21.230.203.217
- 21.230.203.218
- 21.230.203.219
- 21.230.203.220
- 21.230.203.221
- 21.230.203.222
- 21.230.203.223
- 21.230.203.224
- 21.230.203.225
- 21.230.203.226
- 21.230.203.227
- 21.230.203.228
- 21.230.203.229
- 21.230.203.230
- 21.230.203.231
- 21.230.203.232
- 21.230.203.233
- 21.230.203.234
- 21.230.203.235
- 21.230.203.236
- 21.230.203.237
- 21.230.203.238
- 21.230.203.239
- 21.230.203.240
- 21.230.203.241
- 21.230.203.242
- 21.230.203.243
- 21.230.203.244
- 21.230.203.245
- 21.230.203.246
- 21.230.203.247
- 21.230.203.248
- 21.230.203.249
- 21.230.203.250
- 21.230.203.251
- 21.230.203.252
- 21.230.203.253
- 21.230.203.254
- 21.230.203.255