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, 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):


  “哎呀,你居然有四個竹籌,一天跑了四趟?真是一個棒小伙子。”管事申平在拿著竹籌的少年身上拍了一巴掌大為夸贊。   “白登山!”霍去病笑道。3d开奖彩票图片中奖   果然,一炷香過後,霍去病走了進來,怒氣沖沖的,搶奪過雲瑯手里的酒碗,一連喝了三碗酒,重重的將酒碗放在矮幾上道︰“吾欲休妻!”彩票名片模板   雲瑯的眉頭緊鎖,看著霍去病道︰“我想親自走一遭蜀中,把孩子接回來,她既然已經失去了母親,就不該在沒有父親的情況下千里奔波。”   阿嬌探手從盒子里取出那一對金豆莢,驚訝的發現,那上面還刻著字,一個寫著“亙壽永昌”,另一枚上面“富貴延年”。出来买彩票的图片   雲瑯抱著閨女笑道︰“將軍住馬廄沒有什麼大不了的,以後說不定會成為美談。”
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


Regional Internet Registry Creation

Technical Documentation