IP 地址列表: 21.28.185.* (21.28.185.0 - 21.28.185.254)
這是第壹個字節為21,第二個字節為28,第三個字節為185,第四個字節在0 - 255之間的IP地址列表,表示為21.28.185.* (21.28.185.0 - 21.28.185.255)。
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21.28.185.1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。
- 21.28.185.0
- 21.28.185.1
- 21.28.185.2
- 21.28.185.3
- 21.28.185.4
- 21.28.185.5
- 21.28.185.6
- 21.28.185.7
- 21.28.185.8
- 21.28.185.9
- 21.28.185.10
- 21.28.185.11
- 21.28.185.12
- 21.28.185.13
- 21.28.185.14
- 21.28.185.15
- 21.28.185.16
- 21.28.185.17
- 21.28.185.18
- 21.28.185.19
- 21.28.185.20
- 21.28.185.21
- 21.28.185.22
- 21.28.185.23
- 21.28.185.24
- 21.28.185.25
- 21.28.185.26
- 21.28.185.27
- 21.28.185.28
- 21.28.185.29
- 21.28.185.30
- 21.28.185.31
- 21.28.185.32
- 21.28.185.33
- 21.28.185.34
- 21.28.185.35
- 21.28.185.36
- 21.28.185.37
- 21.28.185.38
- 21.28.185.39
- 21.28.185.40
- 21.28.185.41
- 21.28.185.42
- 21.28.185.43
- 21.28.185.44
- 21.28.185.45
- 21.28.185.46
- 21.28.185.47
- 21.28.185.48
- 21.28.185.49
- 21.28.185.50
- 21.28.185.51
- 21.28.185.52
- 21.28.185.53
- 21.28.185.54
- 21.28.185.55
- 21.28.185.56
- 21.28.185.57
- 21.28.185.58
- 21.28.185.59
- 21.28.185.60
- 21.28.185.61
- 21.28.185.62
- 21.28.185.63
- 21.28.185.64
- 21.28.185.65
- 21.28.185.66
- 21.28.185.67
- 21.28.185.68
- 21.28.185.69
- 21.28.185.70
- 21.28.185.71
- 21.28.185.72
- 21.28.185.73
- 21.28.185.74
- 21.28.185.75
- 21.28.185.76
- 21.28.185.77
- 21.28.185.78
- 21.28.185.79
- 21.28.185.80
- 21.28.185.81
- 21.28.185.82
- 21.28.185.83
- 21.28.185.84
- 21.28.185.85
- 21.28.185.86
- 21.28.185.87
- 21.28.185.88
- 21.28.185.89
- 21.28.185.90
- 21.28.185.91
- 21.28.185.92
- 21.28.185.93
- 21.28.185.94
- 21.28.185.95
- 21.28.185.96
- 21.28.185.97
- 21.28.185.98
- 21.28.185.99
- 21.28.185.100
- 21.28.185.101
- 21.28.185.102
- 21.28.185.103
- 21.28.185.104
- 21.28.185.105
- 21.28.185.106
- 21.28.185.107
- 21.28.185.108
- 21.28.185.109
- 21.28.185.110
- 21.28.185.111
- 21.28.185.112
- 21.28.185.113
- 21.28.185.114
- 21.28.185.115
- 21.28.185.116
- 21.28.185.117
- 21.28.185.118
- 21.28.185.119
- 21.28.185.120
- 21.28.185.121
- 21.28.185.122
- 21.28.185.123
- 21.28.185.124
- 21.28.185.125
- 21.28.185.126
- 21.28.185.127
- 21.28.185.128
- 21.28.185.129
- 21.28.185.130
- 21.28.185.131
- 21.28.185.132
- 21.28.185.133
- 21.28.185.134
- 21.28.185.135
- 21.28.185.136
- 21.28.185.137
- 21.28.185.138
- 21.28.185.139
- 21.28.185.140
- 21.28.185.141
- 21.28.185.142
- 21.28.185.143
- 21.28.185.144
- 21.28.185.145
- 21.28.185.146
- 21.28.185.147
- 21.28.185.148
- 21.28.185.149
- 21.28.185.150
- 21.28.185.151
- 21.28.185.152
- 21.28.185.153
- 21.28.185.154
- 21.28.185.155
- 21.28.185.156
- 21.28.185.157
- 21.28.185.158
- 21.28.185.159
- 21.28.185.160
- 21.28.185.161
- 21.28.185.162
- 21.28.185.163
- 21.28.185.164
- 21.28.185.165
- 21.28.185.166
- 21.28.185.167
- 21.28.185.168
- 21.28.185.169
- 21.28.185.170
- 21.28.185.171
- 21.28.185.172
- 21.28.185.173
- 21.28.185.174
- 21.28.185.175
- 21.28.185.176
- 21.28.185.177
- 21.28.185.178
- 21.28.185.179
- 21.28.185.180
- 21.28.185.181
- 21.28.185.182
- 21.28.185.183
- 21.28.185.184
- 21.28.185.185
- 21.28.185.186
- 21.28.185.187
- 21.28.185.188
- 21.28.185.189
- 21.28.185.190
- 21.28.185.191
- 21.28.185.192
- 21.28.185.193
- 21.28.185.194
- 21.28.185.195
- 21.28.185.196
- 21.28.185.197
- 21.28.185.198
- 21.28.185.199
- 21.28.185.200
- 21.28.185.201
- 21.28.185.202
- 21.28.185.203
- 21.28.185.204
- 21.28.185.205
- 21.28.185.206
- 21.28.185.207
- 21.28.185.208
- 21.28.185.209
- 21.28.185.210
- 21.28.185.211
- 21.28.185.212
- 21.28.185.213
- 21.28.185.214
- 21.28.185.215
- 21.28.185.216
- 21.28.185.217
- 21.28.185.218
- 21.28.185.219
- 21.28.185.220
- 21.28.185.221
- 21.28.185.222
- 21.28.185.223
- 21.28.185.224
- 21.28.185.225
- 21.28.185.226
- 21.28.185.227
- 21.28.185.228
- 21.28.185.229
- 21.28.185.230
- 21.28.185.231
- 21.28.185.232
- 21.28.185.233
- 21.28.185.234
- 21.28.185.235
- 21.28.185.236
- 21.28.185.237
- 21.28.185.238
- 21.28.185.239
- 21.28.185.240
- 21.28.185.241
- 21.28.185.242
- 21.28.185.243
- 21.28.185.244
- 21.28.185.245
- 21.28.185.246
- 21.28.185.247
- 21.28.185.248
- 21.28.185.249
- 21.28.185.250
- 21.28.185.251
- 21.28.185.252
- 21.28.185.253
- 21.28.185.254
- 21.28.185.255