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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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“最好快報告區里,找衛生局里人。”管事的告訴他,但是衛生局又在哪里…… 久久99热只有频精品6 任我橹这里只有精品 “那得看你自己。”他覺得他自己的聲音粗暴,他後悔他這樣尖刻地回答她誠懇的問話。他更窘了。 “奇怪,”他嘆口氣,“我總記著這樁事,鐘綠在大風雨里似乎是個很自然的回憶。”在线视频 回頭再看到祖宗傳流下那神氣的衣缽,怎不覺得慚愧?說世亂,杜老頭子過的是什麼日子,辛稼軒當日的憤慨當使我們同情!……何必訴,訴不完。難道現在我們這時代沒有形形色色的人物,悲劇喜劇般的人生做題?難道我們現時沒有美麗,沒有風雅,沒有丑陋,沒有恐慌,沒有感慨,沒有希望?!難道連經這些天災人禍,我們都不會描述,身受這許多刺骨的辱痛,我們都不會憤慨高歌出一縷滾沸的血流?!
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