Advertised prefixes smaller than registry allocations (per /8 block)
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  12:1        57:3        61:14       62:2        64:97       66:224    
  67:111      68:234      69:64      139:1       165:11      193:4      
 194:2       195:6       203:2       208:1       209:12      210:2      
 213:3       216:31      217:1       219:18      220:1      
