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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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話裝在樓下辦公室的一個角落里,門房已經把听筒擱在耳邊。我急躁地把他 又听見電話員小姐的聲音︰ “對不起,我剛才查了一下。線路斷了。因為有個緊急的公務電話。等亚洲色图欧美色图 上校使勁地把他濃密的小胡子又捻又拽,仿佛想把胡子拔掉似的。看得 出來,在他低低的額頭後面,他正在轉念頭。他開始生氣地踱來踱去,兩手 反剪在背後,踱了一個來回,兩個來回,五個、十個、二十個來回。地板在 他沉重的腳步底下微微晃動,當中還夾雜著刺馬針發出的輕微的叮叮的聲 音。最後他終于又在我面前停往了腳步。亚洲情色网 退了?這是什麼意思?退了?“請等一等,小姐。”可是她已經掛上了。 “的確,托尼,這事不是真的,我他媽的高興極了。要真有這事,那麼 對我,對我們大家都是個恥辱,對全團都是個恥辱。”亚洲黄色图片 人聲越來越嘈雜,費倫茨也越來越激動︰“這藥劑師真是條混賬老狗—
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