SixXs: IPv6 Visibility of Default Free Prefixes (DFP’s) as delegated by the RIR’s.

DFP visibility per RIR

Prefix Length distribution

The following prefixlengths are delegated by the above RIR’s.

  • 1x /13
  • 2x /19
  • 8x /20
  • 5x /21
  • 9x /22
  • 5x /23
  • 14x /24, 13x returned, 45x reclaimed
  • 4x /25
  • 11x /26
  • 15x /27
  • 31x /28, 14x returned, 42x reclaimed
  • 23x /29, 1x returned
  • 27x /30, 2x returned
  • 34x /31, 1x returned
  • 8359x /32, 247x returned, 22x reclaimed

http://www.sixxs.net/tools/grh/dfp/