开心五月婷停深深爱五月丁香综合缴情六月五月婷婷开心缴情网阿里CEO张勇:不会裁员 将继续开放招聘创造就业机会

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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  張安世瞅瞅周圍伸長脖子等待入宮的富家子弟道︰“他們爬都會爬到未央宮!”开心五月婷停深深爱   “雲氏沒有那樣的人!”五月丁香综合缴情六月   劉據眼睜睜的看著剛才被他的一番話刺激的如同蠻牛一般的少年人沖向向宮中處罰罪囚的掖庭宮,不由得目瞪口呆。   他們家的馬車的豪奢程度甚至超過了長平的輦車……五月婷婷开心缴情网   霍光冷笑道︰“剛才那人就是赫赫有名的五經博士狄山,雖然有口吃的毛病,卻做得一手好文章,且專攻《連山易》,乃是博士中的佼佼者。我在太學曾經听過此人授課,講的是‘知天命,畏天命,順天命’,雖然一堂課業講的磕磕巴巴,但是,頗有深意,我很喜歡。這樣的人,只適合留在太學授課,不適合出現在太子身邊。這樣繼續下去的話,他的下場應該不好。”
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