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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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  衛青認為自己能達到位極人臣的地步,那麼,這個時候他就不該有一個比他還要厲害的兒子。   劉陵笑道︰“自然是你的,這是你通過艱苦卓絕的斗爭得來的權力,如何能不是你的呢?”中大奖的彩票图   雲瑯轉了幾個圈子,想了好久,最終點點頭道︰“也好,讓皇帝見識一下你的醫術,這對你以後建立璇璣城很有好處。”今天买什么彩票   其實想想也就明白了,這家伙在史書上從來就不是一個善茬,雖然雲瑯武斷的認為霍去病的大腦袋里沒有政治細胞,實際上,他只要肯拿出分析軍陣的精力分出一點來研究,基本上就是一個很厲害的人。   長平覺得自己依靠在錦榻上的樣子最美,因此,在這個夏日里,紗衣,錦榻成了她必不可少的用具。买彩票会中奖吗   雲瑯無奈的道︰“你這是在逼我用殺招啊!”
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