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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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  五脈秉承的原則是“去偽存真”,想不到劉戰斗身為紅字門的中層骨干,居然背地里搞這麼一套,于公于私都是嚴重違紀。看來鄭教授的擔憂是對的,改革開放以來,五脈也是人心思變。從前的原則,被越來越多的人所忽視,從前的理想,在金錢面前也變得慢慢不值一提。劉一鳴想搞拍賣行,未必是他自己的意願,恐怕也是被迫順應學會內部要賺錢的主流呼聲吧。   藥童睡熟了,邢郎中親自來開了門。黎斯不容邢郎中說話,便提前問道︰“回答我一個問題。你……”h版动漫色撸撸   戴熙說的這個情況,在古董造假中很常見。造假者經常會把一張真畫或字帖剪碎,補到十幾甚至二十幾張假畫上去。這樣一來,假畫幾可亂真,當成真品去賣,利潤可翻幾十倍。戴熙一生愛畫,當他發現《清明上河圖》也遭遇了這樣的劫難,失落的那三分之一永不可能恢復,一時之間心神激蕩,才會寫下這麼一張字帖。日啪日啪日日啪网   徐行師見師傅出來,收了槍走到羅大人跟前,行了一禮道︰“師尊,恕我無能。”   說來也怪,劉戰斗一見這三樣東西,面色頓時大變。他對電話里敷衍了幾句,趕緊掛斷,看我的時候,兩眼幾乎要冒出火來。日日啪,日日啪在线影院视频   曹官保沉吟了一下,說道︰“這麼沉的東西,要有輛大車來搬,應該也能接走。一輛大車,上萬斤的東西都能裝,幾千斤總可以吧。湊上十幾個人,將石翁仲推倒了裝車上,拉走就是了。昨天下那麼大雨,要有車轍印也被沖光了,當然看不出來。可是他們為什麼又留個底座?難道是底座太沉,所以先行鑿斷了?”
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