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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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  雲瑯以為,這跟賭博沒有多少差別。   公孫弘來到一棵白菜跟前,背對著雲瑯也看不清他的表情,只發現這個老家伙的肩膀顫抖的厲害。超碰视频/这里只有精品哦——夜夜啪   雲氏籌辦婚禮籌辦的熱火朝天,陽陵邑里面卻沒有什麼動靜,這座通都大邑不會因為某一個人的事情就改變原有的步調。天天操——caoporn   主父偃真誠的對公孫弘道︰“千里之堤毀于蟻穴,竊以為雲氏就是只摧毀大堤的螞蟻,不妨早早除掉。”   曹襄又看了一眼張氏跟甦稚,用肩膀頂一下雲瑯道︰“你發現了沒有,甦稚也好像很喜歡被張氏調戲……這里面是不是有事?”天天爱搞搞狠狠爱   “滾開……”張氏有些生氣,她覺得霍去病是在敷衍她。
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