Given the recent ICANN Board adoption of Global Policy
Proposal-IPv4–2011, the ARIN Board of Trustees at its 6 June meeting
directed ARIN staff to return to the IANA the IPv4 address blocks that
have been voluntarily returned to ARIN in recent years. The total amount
of space being returned to the IANA amounts to roughly a /8 equivalent
and includes the large block of IPv4 addresses returned to ARIN by
Interop in 2010.
Below is the final list of address space that has been returned to the
IANA and this will be reflected in ARIN's database within the next few
hours.
45.2.0.0/15
45.4.0.0/14
45.8.0.0/13
45.16.0.0/12
45.32.0.0/11
45.64.0.0/10
45.128.0.0/9
66.218.132.0/23
66.251.128.0/18
72.44.16.0/20
74.91.48.0/20
144.48.0.0/16
162.12.196.0/22
162.12.200.0/21
162.12.208.0/21
162.12.216.0/22
162.12.224.0/21
162.12.232.0/22
162.12.240.0/21
192.75.4.0/24
192.75.137.0/24
192.75.236.0/24
192.147.11.0/24
192.156.202.0/24
192.197.113.0/24
192.231.238.0/24
198.17.79.0/24
199.21.172.0/22
199.212.57.0/24
204.8.204.0/22
204.11.0.0/22
204.48.32.0/23
204.52.191.0/24
204.225.42.0/23
205.211.83.0/24
207.115.112.0/20
208.73.240.0/22
208.85.156.0/22
209.107.128.0/18
216.98.208.0/20
216.250.96.0/20
Regards,
Communications and Member Services
American Registry for Internet Numbers (ARIN)
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