|How to convert IP address to Binary & vice versa)



- For sure you can easily use some tools like this https://codebeautify.org/ip-to-binary-converter but let’s understand how does it work.


It’s all about this table

table

IP to Binary

We take the IP address: 154.31.16.13 and start with the first part, which is 154.


154:

  1. Can I subtract 128 from 154? Answer: YES. So we assign 1 to 128. → 154 - 128 = 26

  2. Can I subtract 64 from 26? Answer: NO. So we assign 0 to 64.

  3. Can I subtract 32 from 26? Answer: NO. So we assign 0 to 32.

  4. Can I subtract 16 from 26? Answer: YES. So we assign 1 to 16. → 26 - 16 = 10

  5. Can I subtract 8 from 10? Answer: YES. So we assign 1 to 8. → 10 - 8 = 2

  6. subtract 4 from 2? Answer: NO. So we assign 0 to 4.

  7. can I subtract 2 from 2? Answer: YES. So we assign 1 to 2. → 2 - 2 = 0

  8. That will give us a remainder of 0. So for the rest of the values in our row, we can assign 0.

    9. table


31:

  1. Can I subtract 128 from 31? NO, So we assign 0 to 128.

  2. Can I subtract 64 from 31? NO, So we assign 0 to 64.

  3. Can I subtract 32 from 31? NO, So we assign 0 to 32.

  4. Can I subtract 16 from 31? YES, So we assign 1 to 16. → 31 - 16 = 15

  5. Can I subtract 8 from 15? YES. So we assign 1 to 8. → 15 - 8 = 7

  6. Can I subtract 4 from 7? YES, So we assign 1 to 4. → 7 - 4 = 3

  7. Can I subtract 2 from 3? YES, So we assign 1 to 2. → 3 - 2 = 1

  8. Can I subtract 1 from 1? YES, So we assign 1 to 1. → 1 - 1 = 0

    9. So the decimal number 31 is 00011111 converted to binary form. To double check: 16+8+4+2+1=31


    table

You got the idea right?, now do the rest (16 & 13) yourself.

- would be → 10011010.00011111.00010000.00001101



Binary to IP

Just put the 1s and 0s from left to right into the table and put together the 1s.

let’s convert this 10011010.00011111.00010000.00001101 to IP.


10011010:


table

→ 128 + 16 + 8 + 2 = 154


00011111:


table

→ 16 + 8 + 4 + 2 + 1 = 31


so, do the rest by yourself.

- would be → 154.31.16.13



  • Source: petri
  • Wrote: December 13, 2022 | Azar 22, 1401
  • Updated:
  • Posted: December 13, 2022 | Azar 22, 1401