Advertised prefixes smaller than registry allocations (per /8 block)
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   2:2         5:32       24:1        31:2        37:31       41:48     
  46:7        62:7        66:1        69:1        74:4        77:16     
  78:5        79:7        80:12       81:38       82:5        83:17     
  84:6        85:39       86:1        89:22       91:46       92:2      
  93:20       94:2        95:6       103:2       109:5       133:6      
 176:6       178:1       185:54      188:21      197:1       202:1      
 212:52      213:18      216:1       217:27     
