145.139.121开头的IP是哪里的IP,IP地址列表: 145.139.121.* (145.139.121.0 - 145.139.121.254)

这是第一个字节为145，第二个字节为139，第三个字节为121，第四个字节在0 - 255之间的IP地址列表，表示为145.139.121.* (145.139.121.0 - 145.139.121.255)。

这个IP地址列表中包含256个IP地址，我们以其中一个IP地址145.139.121.1为例，来描述这个IP的属性：

第一个IP地址例子

但这只是其中1个IP地址的例子，并不代表这个列表中所有的IP地址都有同样的属性，如果需要了解其它IP和更详细的IP地址段信息，请点击下面列表中的标题链接。

内容:

• 1. 第一个IP地址例子
• 2. B类IP地址列表
• 3. 最后一个IP地址例子

145.139.121.1是一个公开IP地址，使用者位于荷兰 海尔德兰 Arnhem，其用途是固定电话互联网服务提供商，类型是宽带/电缆/光纤。更多详情：145.139.121.1。

B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，前两段号码（字节1.字节2）为网络号码，剩下的后两段号码（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，B类IP地址就由2字节的网络地址和2字节主机地址组成，网络地址的最高位必须是'10'。

B类IP地址范围：128.0.0.0 ~ 191.255.255.255，可用IP地址范围：128.0.0.1 ~ 191.255.255.254。

B类IP地址中网络的标识长度为14位，主机标识的长度为16位，B类网络地址适用于中等规模的网络（2 ^ 14 = 16384个），每个网络所能容纳6万多台计算机（2 ^ 16 - 2 = 65534个）。

如果您需要了解B类IP段更详细的IP地址段信息，请点击B类IP地址列表中的标题链接。

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145.139.121.255是一个公开IP地址，使用者位于荷兰 海尔德兰 Arnhem，其用途是固定电话互联网服务提供商，类型是宽带/电缆/光纤。更多详情：145.139.121.255。