1、ARIN(American Registry for Internet Numbers)
负责北美、南美、加勒比以及非洲撒哈啦部分的IP地址分配。同时还要给全球NSP(Network Service Providers)分配地址。
2、RIPE(Reseaux IP Europeens)
负责欧洲、中东、北非、西亚部分地区(前苏联)
3、APNIC(Asia Pacific Network Information Center)
负责亚洲、太平洋地区
Region Address Range
Multiregional 192.0.0.0-193.255.255.255
Europe 194.0.0.0-195.255.255.255
Others 196.0.0.0-197.255.255.255
North America 198.0.0.0-199.255.255.255
Central/South America 200.0.0.0-201.255.255.255
Pacific Rim 202.0.0.0-203.255.255.255
Others 204.0.0.0-205.255.255.255
Others 206.0.0.0-207.255.255.255