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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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  這樣的酒壇子還有很多,是雲瑯特意給太宰準備的,他非常希望太宰能夠從里面走出來,哪怕被那塊石頭輻射成怪物他也高興,可惜,這里的酒沒人喝過。大股的黃沙從蛇洞里面滑出來。   張湯嘆息一聲道︰“你要為官,怎麼能不知道朝廷官職?我這一次要升遷衛尉,不是廷尉,更不是中尉。中尉負責糾察天下,衛尉負責宮門禁衛以及長安治安,廷尉乃是九卿之一,我目前還沒有資格。”360彩票大乐透走势图表分析   孟大,孟二,早就看見了劉徹,卻不敢過來,劉徹帶給這兄弟兩的回憶不太好,他們沒少挨劉徹的揍。新浪彩票走势图双色球走势   中軍府從來就沒有什麼好東西,他們的倉庫里全是軍隊不收的破爛,爛皮甲,爛馬鞍子,爛戰衣,生銹的戰刀,矛戈的木柄已經腐朽了,弩弓的弓弦早就沒有了任何強度,稍微用力拉扯一下就會斷裂,腐朽的繩子,自然也有一壇壇文皇帝時期的鹽菜。   他更喜歡用鐵鍋加水,加米,然後用慢火慢慢的蒸熟一鍋米飯,雖然鍋底可能會有鍋巴產生,這樣做出來的米飯,無疑是最香甜的。浙江体育彩票大乐透中奖方式   “嗯?這話是個什麼典故?”
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