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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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去和這樣一個備受贊譽的人物見面,這種機會在別的任何時候都會使我 真誠地感到高興。但是此刻我心煩意亂,想到歡天喜地、寒暄問好、祝酒致 辭,我覺得這簡直是天下最最難以忍受的事。所以我想方設法,盡快撤走, 借口我感到不大舒服。可是費倫茨猛然大喝一聲︰“不行!今天可不許開小 差。”說著已經挽往了我的胳臂。我只好很不情願地表示屈服。他們拽著我 走的時候,我腦子里亂哄哄的,听費倫茨講,巴林凱如何如何幫助過誰擺脫 困境。他曾經很快就給費倫茨的妹夫謀了一個職位,要是我們這些人不能更 快地青雲直上,只消乘船去找巴林凱,或者飄洋過海到印度去。約茨西這個 身材瘦長、脾氣乖張的小伙子不時在忠厚老實的費倫茨的這番感恩戴德、熱 情洋溢的長篇大論之中來上幾句酸溜溜的話。他用諷刺的口吻說道︰要是巴 林凱沒有釣著這尾肥頭胖耳的荷蘭鱈魚,不知道上校是否也會這樣親熱地迎 接他的“小心肝”。話說回來,據說那女人比他大十二歲。施泰因許貝伯爵 哈哈大笑道︰“既然要賣身,至少該賣個好價錢啊。” 天天鲁啪视频在线 可是康多爾驀地變得聲色俱厲︰ “不對!怎麼沒什麼?責任可重大呢,如果你用同情心開人家的玩笑,特别黄的免费大片视频 “可是現在那件事情終于發生了。現在,親愛的,因為我已經不能再向 走廊里灰蒙蒙的,空無一人,不知什麼地方有個哨兵踱來踱去,有個水男女做爰高清免费视频 可是隔一會兒我就嚇得直跳起來。因為這封信已經擱在桌上——這怎麼 可能呢?——就放在燈光照射的光圈之中。我剛才以為這封信還藏在我胸口 的口袋里呢,——是的,信就在那里,一個四四方方的藍信封,十分熟悉的 筆跡。
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