Advertised prefixes smaller than registry allocations (per /8 block)
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  57:3        61:5        64:93       65:5        66:213      67:108    
  68:204      69:60      165:11      195:1       203:1       208:7      
 209:11      210:1       211:2       216:19      218:3       219:22     
 220:1      
