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, 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):


  皇帝下達了赦免令,于是,除過大逆之罪,余者都在赦免之列。   劉徹這個開著大漢國這輛重車的司機就是這麼干的。av天堂2017在线   阿嬌點頭道︰“知道,一道關于去病兒的,沒有應驗,一道關于隋越的,準確的令人發指,一道關于大將軍的,應驗了一半。怎麼,陛下知曉剩余的兩項?”无码av种子2018   霍光陰郁的道︰“按道理來說完全不可能,偏偏周鴻這樣做了,我覺得應該跟太子有關。”   “能否堅持兩日?”av资源   當皇帝坐進包廂的時候,雲瑯跟曹襄也跟著走進了包廂,劉徹瞟了兩人一眼道︰“爾等以為誰會贏?”
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


Regional Internet Registry Creation

Technical Documentation