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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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  多年的夫妻,她對雲瑯自然是非常熟悉的,別看雲瑯此時可疑的瞅著紅袖流口水,他的眼楮里未必會有紅袖身影的存在。   “既然如此,此次會所,就安置在雲氏,只是你雲氏除過僕從,其余人等都要退出。”亚洲黄网   他只記得,自己在很久以前就打開了人參貿易,目的就是想要借用人參貿易打通幽州邊地與長安的商貿往來,而不是老死不相往來。亚洲情色图   還有一些人自認為自己的學問已經學成了,來長安見名師的機會就更加重要了。   紅袖用團扇掩著半邊面孔嬌羞的道︰“我不下去,正教小郎識字呢。”国产亚洲网友自拍   不過,劉徹同意儒家開山立櫃,卻對其余諸子百家采用了開明的態度。
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