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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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  這樣的變化讓他非常的有成就感,他曾經無數次的夢想過,一旦有飛機從雲氏莊園起飛,不知道是一個什麼場景。   一個人只要獲得了一個瓶子,就總想用什麼東西把這個瓶子裝滿。吉吉影音AV资源   初秋的雨下的不大也不小,有些溫柔,沒有听見雷聲,自然也沒有恐怖的閃電。色色AV资源   褚狼還是很能干的,雲氏售賣一些零散貨物的鋪子,已經在他的經營下很有些欣欣向榮的意思,主要是雲氏出產的東西大多數都是有錢都沒處買的好東西。   見雲瑯他們逃得淒慘,連游春馬都跑丟了,梁池等五具尸體居然壞規矩的鼓掌大笑。夜夜撸   阿嬌家的大門緊閉,不知道里面住進來了什麼了不得的人物,雲瑯想進去拜會一下阿嬌,都被大長秋給拒絕了,而小蟲這些天也沒有機會去阿嬌家的溫泉池子里游泳。
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