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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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  劉據對金日的傷勢並不感興趣皺眉道︰“你們說此人頗受我父皇看重?”   看護婦將金日推進了病室,守候在病房里面的霍光,立刻就拿起掛在病床上的病歷看了起來。色色AV资源   霍去病瞅著廷尉府官廳道︰“等我們解甲歸田了,阿瑯坐什麼位置都是可以的。”夜夜撸   “用不著,我小師娘是手癢癢了,就想切開人的身體,恰好你送上門來了,正好練手。”   不過,在長安氣候多變的春日里,提前發芽並不算是什麼好事情,有時候一場倒春寒,一場突如其來的大雪就會把剛剛萌發的生命毀掉。思思热99re9在线视频   大秦人笑道︰“不認識,您也知道,大秦人看大漢人,總覺得每一個人都長得一樣。”
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