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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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  雲瑯茫然的看著監牢黑乎乎的房頂自嘲的笑了一下,指著腦袋對司馬談道︰“如果我說只是看著司馬遷非常的順眼您信不信?”   大長秋不願意說的話,沒人能從他的嘴里掏出來,雲瑯沒好氣的道︰“初秋的時候要你們多種一些,你們非要多種一些好看的,現在好了,你家的菜圃被你們給禍禍光了,現在就來禍害我家的菜圃。”日日啪夜夜啪在线看   張湯笑道︰“一個多陌生婦孺都關愛有加的人,如果听到自己有了親骨肉,微臣不敢想是個什麼情形。”夜夜干日日操狠狠爱   現在?只能讓這家伙繼續倒吊在檻車邊上,就像一只剛剛被他射死的野豬。   宰相薛澤忽然插話道︰“軍司馬有護衛主將之責,雲瑯如此做雖說事出有因,擾亂點兵,依舊不可輕饒。”日日啪啪在线影院   “骨氣是吧?”
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