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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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  少年人一身藍色的春衫,端坐在馬上確實有幾分顏色,只是,當甦稚的腦袋探出車窗沖著他喊了一聲小伉之後,那個騎著馬混在人群里的漂亮少年立刻就變成了鵪鶉。   听何愁有這樣說,雲瑯的眼前一陣陣的發黑……亚洲巨乳自拍在线视频   “這些腦滿腸肥的家伙們心里到底想什麼呢?這樣的事情怎麼可能做到?不要說在匈奴大閼氏面前進言,只要能靠近匈奴大閼氏耶耶就算是成功了。”偷拍自拍图   “還能為什麼呢,雲氏要對付黃氏,公孫弘,桑弘羊這些人也早就對蜀中自成一片天的樣子很不滿。甚至還有燒掉劍閣七百里,蜀中別是一洞天的傳聞出來了,這時候,陛下要是還不整肅一下蜀中,那就太說不過去了。”   卓姬冷笑道︰“我日日梳妝,獨坐高軒等他前來,他不來,卻總是送錢,難道在他的眼中,我卓文君心中只有錢財麼?”偷拍自拍电影   雲瑯扶著宋喬坐下小聲道︰“怎麼這麼著急?”
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