Advertised prefixes smaller than registry allocations (per /8 block)
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   5:1        24:3        37:1        41:252      50:4        62:1      
  63:35       64:61       65:9        66:70       67:52       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     
 109:12      173:6       177:11      179:12      181:1       184:6      
 185:10      186:4       187:8       188:2       190:17      191:28     
 197:339     201:7       208:67      209:103     212:105     216:114    
 217:2      
