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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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  霍光不耐煩的道︰“這東西就是一個財富的代用品,如果有一天人們不用黃金當價值媒介了,它就是一塊無用的東西。對我們來說,土地,人,物產才是真正的財富。”   那些伴隨狗子一起回來捕奴團的武士也經常在路上光著脊梁趕路。久久偷拍国产在线视频   所有人中,最厲害的卻是汲黯,他當著劉徹的面吃掉了桌子上的飯食,還一邊吃一邊抱怨飯食早就涼掉了,上面還沾有別人的口水跟汗水,味道不對。一本道电影   “弟子信,可是,您好像不怎麼喜歡皇帝。”   看見雲瑯跟曹襄在喝酒,就忍不住干嘔起來。一本道久久综合久久   少年男子瞅瞅進屋子的媳婦,嘿嘿笑道︰“農家子不怕吃苦,過得兩年,就能去雲氏雞場抓些雞雛,鴨雛來飼養,多少也是一門財路。”
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