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We are responsible for global coordination of the Internet Protocol addressing systems, as well as the Autonomous System Numbers used for routing Internet traffic.

Currently there are two types of Internet Protocol (IP) addresses in active use: IP version 4 (IPv4) and IP version 6 (IPv6). IPv4 was initially deployed on 1 January 1983 and is still the most commonly used version. IPv4 addresses are 32-bit numbers often expressed as 4 octets in “dotted decimal” notation (for example, 192.0.2.53). Deployment of the IPv6 protocol began in 1999. IPv6 addresses are 128-bit numbers and are conventionally expressed using hexadecimal strings (for example, 2001:0db8:582:ae33::29).

Both IPv4 and IPv6 addresses are generally assigned in a hierarchical manner. Users are assigned IP addresses by Internet service providers (ISPs). ISPs obtain allocations of IP addresses from a local Internet registry (LIR) or National Internet Registry (NIR), or from their appropriate Regional Internet Registry (RIR):

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  偌大的始皇陵對于雲朗來說,就是一個巨大的未解之謎,雲瑯很想知道始皇帝死後到底弄出來了多少的謎團。   他從很小的時候就被婦人圍繞著,在柔聲軟語中被呵護著長大,少年時的一場大病,幾乎摧毀了他所有的希望,讓他所有的期望都變成了一場夢。日夜撸百度影音   雲家自然不敢這麼做,梁翁用最快的速度找人把一車銅錢搬下馬車,手里抓了一把把的銅錢,往那些小黃門的袖子里塞,家主說了,這是一樁長久買賣,可不敢把人都得罪光了。男子日夜撸管浪叫   反漢復秦這樣的大事,無論如何也不該是他的責任。 日夜撸改名叫什么   一隊宦官來到了雲家,大長秋大剌剌的走在最前面,來到雲家的倉庫跟前,指著里面的雞蛋道︰“給老夫數仔細了,少算一枚,老夫就拿你們的腦袋算賬!”
Map of RIRs
RegistryArea Covered
AFRINICAfrica Region
APNICAsia/Pacific Region
ARINCanada, USA, and some Caribbean Islands
LACNICLatin America and some Caribbean Islands
RIPE NCCEurope, the Middle East, and Central Asia

Our primary role for IP addresses is to allocate pools of unallocated addresses to the RIRs according to their needs as described by global policy and to document protocol assignments made by the IETF. When an RIR requires more IP addresses for allocation or assignment within its region, we make an additional allocation to the RIR. We do not make allocations directly to ISPs or end users except in specific circumstances, such as allocations of multicast addresses or other protocol specific needs.

IP Address Allocations

Internet Protocol Version 4 (IPv4)

Internet Protocol Version 6 (IPv6)

Autonomous System Number Allocations

Procedures

Regional Internet Registry Creation

Technical Documentation