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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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訝不已地望著自己。怎麼?我這平庸的年輕人也擁有支配別人的力量?我這 麼個口袋里連五十克朗都沒有的人竟然能給一個宮翁帶來快樂,比他所有的 朋友給他的快樂更多?我,霍夫米勒少尉真能給人幫助,給人慰藉?要是我 在一個下肢癱瘓、心情煩亂的姑娘身邊坐上一兩個晚上,和她聊聊天,她的 眼楮就會發亮,她的雙頰就會泛紅,整幢陰森淒慘的房子就會因為我在那里 而大放光芒? ? 卡薩諾瓦(1725—1798)︰意大利冒險家,善于追逐女性,這里以此諷刺伏林斯基上尉。亚洲色姐妹综合网姐姐 超碰综合 我走向那張桌子,旁邊響起陣陣樂聲。我鞠了一躬,彬彬有禮地表示邀 舞。一雙驚愕的眼楮抬起來深表意外地直瞪著我,嘴唇半開,只字不吐。可 是她一動不動,絲毫沒有跟我同去的樣子。莫非她沒有明白我的意思?我再 一次向她鞠躬,腳上的刺馬針輕輕一踫︰“小姐,我可以邀您同舞嗎?” 這就是引起這段公案的那個倒媚的蠢事。如今我心情平靜,而且事隔多 年,我重新把這段幼稚的、帶來一切災難的插曲設想一下,我必須承認,其 實我是完全無辜地跌進了這個誤會之中;邀請一個下肢癱瘓的姑娘跳舞,這 樣的蠢事,即便是天資最聰明、經驗最豐富的人,也在所難免。但是當時我 剛受驚嚇,一時發懵,覺得自己不僅是個無可救藥的蠢貨,而且行為粗野, 簡直是個罪犯。我仿佛覺得自己用鞭于抽打了一個無辜的孩子。其實我當時 只要鎮定自若,泰然處之,所有這一切全都可以挽回;而我並未設法賠禮道 歉,卻干脆像個罪犯似的溜之大吉,這一來倒無可挽回地把事情弄糟了。我 站在府邸門口,第一陣寒風吹拂我的額頭時我就意識到了這一點。大香蕉综合
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