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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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  林徵羽︰[麼麼噠]   “這操作之前直播時我也看過,黑子還帶節奏說開了鎖頭掛,來呀,繼續無腦黑呀,來跟我說道說道比賽的時候怎麼開掛???”伊人情色网   林徵羽聞言抬頭, 頓了一秒道︰“壞了。”伊人影院   王淼淼也無心復習了,想了一上午終于下定決心,分手就分手,要做一個拿得起放得下的人!   老虎的背上馱著一柄粗大的木弓,以及一只裝滿羽箭的箭囊。伊人成人综合影院   “你看這條微博,Lin神為年糕做的那些事,這一樁樁一件件,連我一個鋼鐵直男看了都要心動。”王淼淼感嘆,臉上帶著迷弟專屬表情︰“果然大神做什麼都有buff加成,追起人來一擲千金。”
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