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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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  “找到了些什麼?”   只要這些人對金錢還有渴望,他們就能帶動一大波羌人去城外活捉什麼用兩只腳走路的野人之類的東西。一人伊人   何愁有出聲夸贊了一下,見餓狼脖子上的毛落下來了,就下令修建營地。大香蕉综合伊人国语   查罕怒道︰“你以為你還是那個高高在上的左賢王麼?當初在武城塞,八失里就勸你立刻進攻伊秩斜,不要听伊秩斜的任何話,一見面就廝殺,直到將伊秩斜殺死。   哈哈哈,我大漢不干那事,雖然太祖高皇帝有斬白蛇賦大風的經歷,現在也漸漸不再提了。大香蕉狼人伊人av   或許是去年的那場寒流過于寒冷,有些冰面並未完全碎裂,于是,順著水流流淌下來的冰凌,就堆積在厚厚的堅冰邊緣,逐漸形成了一條冰壩。
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