Advertised prefixes smaller than registry allocations (per /8 block)
--------------------------------------------------------------------

  50:1        63:1        64:2        66:2        78:1        82:4      
  95:1        98:1       107:34      108:3       173:1       178:2      
 184:11      185:5       202:12      203:4       209:8       212:1      
 223:1      
