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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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此外,關于破解居民“看病難”問題,北京通過解決資源分配,在醫改中做了一些事情。今年年底北京將實現非急診全面預約,改善患者日常就醫感受。同時,實現院內層級轉診,減輕看病難的問題。 據了解,截至8月13日21時,共有太保、陽光、平安、安邦、太平、國壽、永誠7家財險公司已接到463件財產險報案,其中,車險報案為207件。對于事故中受到損害的私家車,一位車險理賠人士表示,在車險中,火災、爆炸等意外因素造成損失,屬于車損險的條款賠付範圍,如果投保了相應的險種,可以給予理賠。国产在线播放原创精品 去年兩會期間,剝洋蔥記者與王 有過一次近距離接觸。99久久点在线精品 據台灣“中央社”1月18日綜合大陸媒體報道稱,大陸首次發行生肖郵票是1980年2月發行的庚申猴,今年1月5日發行的丙申猴已經是大陸第4輪生肖郵票。 而所謂防、市容、環衛等多方面條件、可用作停車資源的空間更為有限。如果想要 對現有場地進行改造,除審批繁瑣之外,場地改造等成本也十分高昂。以重慶為例,記者之前了解到,由于地形起伏較大加上平地空間有限,某些地區一個停車位的 建設成本甚至高達15萬元左右,投資回報率十分不明顯。久久精品一本到99热 預計8月18日24時(下周二),國內汽柴油零售價跌幅在200元/噸,測算到零售價格90號汽油和0號柴油(全國平均)每升分別降低0.15元和0.17元。此次零售價格下調之後,北上廣等已經實施國Ⅴ標準的地區92#汽油零售價格也見“5”字頭。
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