Tabela da máscara de sub rede

  masc.     bit    redes             IP/rede                                           IP/broadcast

0 128 192 224 240 248 252

24 25 26 27 28 29 30

1 2 4 8 16 32 64

0 0,128 0,64,128,192 0,32,64,96,128,160,192,224 0,16,32,48,64,80,96,112,128, 144,160,176,192,208,224,240 0,8,16,24,32,40,48,56,64,72,80, 88,96,104,112,120,128,136, 144,152,160,168,176,184,192, 200,208,216,224,232,240,248  0,4,8,12,16,20,24,28,32,36,40 44,48,52,56,60,64,68,72,76,80 ,84,88,92,96,100,104,108,112, 116,120,124,128,132,136,140, 144,148,152,156,160,164,168, 172,176,180,184,188,192,196, 200,204,208,212,216,220,224, 228,232,236,240,244,248,252

255 127,255 63,127,191,255 31,63,95,127,159,191,223,255 15,31,47,63,79,95,111,127,143, 159,175,191,207,223,239,255 7,15,23,31,39,47,55,63,71,79, 87,95,103,111,119,127,135,143 151,159,167,175,183,191,199, 207,215,223,231,239,247,255 3,7,11,15,19,23,27,31,35,39,43, 47,51,55,59,63,67,71,75,79,83, 87,91,95,99,103,107,111,115, 119,123,127,131,135,139,143, 147,151,155,159,163,167,171, 175,179,183,187,191,195,199, 203,207,211,215,219,223,227, 231,235,239,243,247,251,255