Four /8 Blocks Allocated to the RIRs

Re-posted from the arin-announce mailing list:

Today, 30 November 2010, the IANA allocated four /8s to the RIRs – 23/8 and 100/8 to ARIN and 5/8 and 37/8 to RIPE NCC. This leaves only seven /8s remaining in IANA free pool of IPv4 addresses, or 2.73% of the total.

When the IANA IPv4 free pool has only five /8 blocks remaining, they will be simultaneously distributed to the five RIRs in accordance with global policy. This means that only two blocks remain to be handed out under the normal distribution method.

With so little IPv4 address space left in the global free pool, ARIN continues to emphasize the need for all Internet stakeholders to adopt the next generation of Internet Protocol, IPv6.

Visit for more information on IPv6 adoption, or contact us at with any questions.


Communications and Member Services
American Registry for Internet Numbers (ARIN)

As to what we, Roller Network, are doing:

  • All of our hosting services (dedicated servers, colocation, etc.) already have dual-stack native IPv6 available.
  • All of our DNS services are accessible over IPv6.
  • Our outbound mail (submission, smarthost) accepts connections and can send to other IPv6 enabled MTAs.
  • Our hosted mail boxes (IMAP, POP3) are accessable via IPv6.
  • Our internet access services in Reno (metro Ethernet, fixed wireless) are dual-stack IPv6 native.