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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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 今日的就業報告與此前的消費者、企業開支等數據一道,均指向美國經濟在去年四季度陷入1.0%的低增長後新年伊始已重顯強勢。目前市場普遍預期一季度美國經濟的增長率約為2.5%。 盡管徐建一任內對自主品牌的研發投入高達320億元,但賈新光仍然認為他在自主品牌發展上有兩大決策失誤。第一,對紅旗品牌的戰略決策是失誤的,按照徐的部署,紅旗主要是針對公務車市場,而國家恰恰逐步取消了政府公務車的采購。国产高清线观看网站 3月1日,在西安市高陵區陝汽路水榭花都小區,一名女業主的遺體在其居住的樓內電梯中被發現,而距離該電梯因故障停用已過去逾30天。小區物業方面稱已在第一時間報警,當地警方已經介入調查此事。昨日,西安市高陵區政府公布調查結果,稱造成當事人死亡的直接原因是電梯維修方在維修電梯時存在工作失誤,停電後沒有確認電梯內是否有人被困,公安高陵分局已對電梯維保公司和小區物業公司進行立案偵查,對有關責任人依法刑事拘留。白白在线线观看视频 消費者可“擇價”選擇零部件產品與此同時,“汽車零配件與不同汽車品牌合作要有不同的編碼,一個配件進入40個企業就要有40個編碼,給汽配企業帶來很大的成本負擔,這些負擔最後都轉嫁到消費者身上。”中國物品編碼中心秘書長張成海說。 黨的十八大以來,中央巡視工作的理念思路與時俱進、方式方法不斷創新︰亚洲人成视频在线播放 此外,為促進出租車結構調整及節能減排,計劃今年更新1000輛天然氣車;2016年更新2000輛電動車和2000輛混合動力車;2017年 更新3000輛電動車和3000輛混合動力車。到2017年,累計報廢更新車輛中電動車、天然氣車、混合動力車各5000輛,其余更新為第五、第六階段排 放標準的汽油車;油耗和污染物排放均減少20%。
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