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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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  這些商人大部分來自遙遠的西域,是一群極為勇敢的人,只要讓他們知道什麼地方有好的貨物,他們不遠千里也要來。 第一二四章 我們要絲綢男子日夜撸管浪叫   “老祖宗現在是受降城的監軍,我們的一舉一動都在他的法眼之下無所遁形。听說老祖宗正在招納親衛,你可以去試試。”日夜撸改名叫什么   至少,在故鄉,不用頭枕著武器入眠,不用刻意去想今晚會不會有敵人來襲擊。   一秒鐘的親密接觸能有什麼用?木下柚花哈哈 日夜撸   於單努力的轉過頭,繼續看著一大坨柳絮從宮牆外面飄進來,他想探手捉住,那團柳絮卻從他的指縫中間溜走了,最後撞在牆壁上,跌落在牆角。
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