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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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本文為《終極一班》與《還來得及再愛你》的同人文(腦洞開很大……)   開到荼蘼,才發現愛一直都在。媽媽鲁播放   有街市燒味檔和海鮮檔分別指出,事前已知悉可能受暴力沖擊影響,故提早關門收鋪,但受到暴力沖擊影響,26日街市人流減少,生意額明顯較平時下跌。狼人干综合伊人网   「雷克斯」不置可否地看著汪大,扯起一的嘴角,「所以,你是我打了那女的?」 “消費者對純電動車的主要顧慮之一就是充電時間長,換電模式不失為一種創新的嘗試,值得先試先行,在某些品牌或者場景(例如公共交通)先推廣。”8月26日,一家造車新勢力企業的高層對21世紀經濟報道記者表示。天天色 該怎麼撕掉“虛假信息”的標簽?
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