Subnetting

  1. .128
    /9 /17 /25

    Block: 128

    Bits: 1
  2. .192
    /10 /18 /26

    Block: 64

    Bits: 2
  3. .224
    /11 /19 /27

    Block: 32

    Bits: 3
  4. .240
    /12 /20 /28

    Block: 16

    Bits: 4
  5. .248
    /13 /21 /29

    Block: 8 

    Bits: 5
  6. .252
    /14 /22 /30

    Block: 4

    Bits: 6
  7. .254
    /15 /23 /31

    Block: 2

    Bits: 7
  8. .0
    /8 /16 /24

    Block: 256

    Bits: 0
  9. /9
    255.128.0.0

    Block: 128

    Bits: 1
  10. /17
    255.255.128.0

    Block: 128

    Bits: 1
  11. /25
    255.255.255.128

    Block: 128

    Bits: 1
  12. /10
    255.192.0.0

    Block: 64

    Bits: 2
  13. /18
    255.255.192.0

    Block: 64

    Bits: 2
  14. /26
    255.255.255.192

    Block: 64

    Bits: 2
  15. /11
    255.224.0.0

    Block: 32

    Bits: 3
  16. /19
    255.255.224.0

    Block: 32

    Bits: 3
  17. /27
    255.255.255.224

    Block: 32

    Bits: 3
  18. /12
    255.240.0.0

    Block: 16

    Bits: 4
  19. /20
    255.255.240.0

    Block: 16

    Bits: 4
  20. /28
    255.255.255.240

    Block: 16

    Bits: 4
  21. /13
    255.248.0.0

    Block: 8

    Bits: 5
  22. /21
    255.255.248.0

    Block: 8

    Bits: 5
  23. /29
    255.255.255.248

    Block: 8

    Bits: 5
  24. /14
    255.252.0.0

    Block: 4

    Bits: 6
  25. /22
    255.255.252.0

    Block: 4

    Bits: 6
  26. /30
    255.255.255.252

    Block: 4

    Bits: 6
  27. /15
    255.254.0.0

    Block: 2

    Bits: 7
  28. /31 Not really usable
    255.255.255.254

    Block: 2

    Bits: 7
  29. /23
    255.255.254.0

    Block: 2

    Bits: 7
  30. /8
    255.0.0.0

    Block: 256

    Bits: 0
  31. /16
    255.255.0.0

    Block: 256

    Bits: 0
  32. /24
    255.255.255.0

    Block: 256

    Bits: 0
  33. 1 bit
    /9 /17 /25

    .128

    Block: 128
  34. 2 bits
    /10 /18 /23

    .192

    Block: 64
  35. 3 bits
    /11 /19 /24

    .224

    Block: 32
  36. 4 bits
    /12 /20 /28

    .240

    Block: 16
  37. 5 bits
    /13 /21 /29

    .248

    Block: 8
  38. 6 bits
    /14 /22 /30

    .252

    Block: 4
  39. 7 bits
    /15 /23 /31

    .254

    Block: 2
  40. 0 bits
    /8 /16 /24

    .0

    Block: 16777216, 65536, 256
Author
kdinser
ID
195627
Card Set
Subnetting
Description
Subnetting chart
Updated