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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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  雲瑯當然不會認為這是神跡,青煙之所以會鑽進石壁,只能說明石壁後面有空間,而且還是直接通到房頂上,形成了一個煙囪樣的東西,才能讓煙柱這樣詭異。   玩美式橄欖球沒有身體沖撞是不可能的,再加上這群人也不喜歡什麼章法,很快就演變成兩群牛在斗毆。日日啪啪在线影院   雲瑯無奈的撓撓後腦勺,苦著臉蹲在城門口道︰“門口的那兩座金人可能就跟這座大門有關,既然金人已經毀壞了,大門是關不上了,不如我們把千斤閘放下來算了。”日啪 日日啪在线影院   雲瑯笑著點頭道︰“一定,你的幸福將不會有邊際!”   “怎麼說?”張湯對雲瑯解決蝗災的說法很有興趣。日日拍日日啪在线视频   “放心吧,一定會復原的,不過,這必須是在我弄明白這里面的所有奧秘之後才會做的事情。”
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