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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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  雲瑯隔著窗戶按著曹襄的肩膀道︰“你已經長大成人了,兒子都有了,是不是可以不要吃奶了?”   劉二站在碼頭下面,快活的從漁網里面取出那條倒霉的鯉魚,抓著魚鰓將它重重的丟進木盆里,然後快速的蓋上蓋子,否則,這種喜歡跳躍的鯉魚就會三蹦噠兩蹦的重新回到大河里。一本道久在线综合色色   雲瑯放下毛筆,給甦稚倒了一杯茶水,伺候這個雙手綁著布條的丫頭喝完水,又開始忙于自己的工作。大香蕉一本道久在线   窪地里的柴火早就燒完了,只有一具骸骨還完整的躺在灰燼中,他用手一模,灰燼還在發燙,顧不上這些,找來一塊石頭,三兩下將被火燒的酥脆的骨頭砸碎,脫下衣衫把骨頭包裹起來,拴在背上,匆匆的從伙夫手里搶過兩塊煮熟的肉,就趕緊爬上戰馬,此時,大隊人馬已經開始緩緩移動了。   “文書我用了印信,已經寄走了。”一本道久久综合久久爱   何愁有嘿嘿笑著用手點點許良道︰“人心經不起揣測,也經不起試驗,不過呢,試試也好,就遂了你的意,反正到了我們這里還可以修改的。”
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