Advertised prefixes smaller than registry allocations (per /8 block)
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   5:1        24:3        37:1        41:250      50:3        62:1      
  63:35       64:61       65:9        66:70       67:51       68:16     
  69:42       70:3        72:19       74:63       76:35       81:5      
  84:2        86:5        87:1        89:10       91:15       93:1      
  96:8        97:2        98:2       102:8       107:1       108:15     
 109:14      173:6       176:1       177:8       179:12      181:1      
 184:6       185:11      186:4       187:8       188:2       190:17     
 191:28      197:344     201:7       208:67      209:103     212:103    
 216:114     217:2      
