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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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出點主意。” 巴林凱的臉色一下子嚴肅起來。臉繃緊了。他把煙扔掉。 可是一陣恐怖的心情一下子攫住了我。這種粗魯的笑聲像一只利爪緊緊 地抓住了我的心,因為如果有一個人正在呻吟,正在忍受難以估量的痛苦, 我們怎麼能這樣放聲大笑?有人正在淪于毀滅,我們怎麼能用這些惡俗的玩 笑來互相逗趣,互相揶揄?我知道,等馮德拉斯切克的廢話一完,馬上就要 開懷暢飲,高聲談笑,消磨時光。大伙將放聲歌唱,歌唱《拉恩河上的女店 主》里最新的幾段歌詞,並且大講笑話。大家就笑啊,笑啊,笑個不停。驀 然間,這一張張閃閃發亮的好心善意的臉我再也看不下去了。她不是在信上 寫了,只要我送張紙條去,只要我送一句話去就行了嗎?我是不是到電話機 那兒去給城外打個電話?我可不能讓別人這樣等啊!我得跟她說點什麼,我 得??超碰在线 己一眼就看出幾分了。如果真的到了這個地步,那麼規勸、攔阻全都已經無 濟于事。當朋友的就只好挺身而出。一切都會辦得妥妥帖帖,對此,用不著 再特別擔保。只不過有一點,霍夫米勒,你明理曉事,總不會幻想,你在我 們那兒辦事,我會讓你一上來就地位顯赫,步步高升。這樣的事情在任何一 個正經的企業里都沒有的。如果來了個人平白無故地就跳過別人的肩膀躥上 去,只會使別人心生憎恨。你必須從最底層干起,說不定先得坐在賬房里干 幾個月愚蠢無聊的抄抄寫寫的活,然後才能把你派到海外的種植園去或者想 方設法變點花樣出來。反正,我已經說過了,我會張羅這件事的。明天我妻 子和我就動身,在巴黎逛那麼八到十天,然後我們就到勒阿弗爾和安特衛普 去幾天,視察幾家代理處。不過最多三星期我們就回來,一到鹿特丹我就寫 信給你。別擔心——我忘不了!你對巴林凱盡可放心。”超碰在线视频 可是剛寫了開頭幾行,我就不覺停筆,耽于奇特的遐想了。我停止書寫,2018最新在线国产自拍 “話說回來,我完全可以把這些事說給你听!因為今天我已經不再為此 感到羞慚,而如果有人及時地把你這些羅曼蒂克的明燈一一關掉,說不定對 你只有好處。”
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