Dotless IP Address

This is a concept I had forgotten about until recently, it can often serve as a simple means of code obfuscation and is also sometimes referred to as “Decimal Address”.

Some background:

  • DNS is used to convert a URL/domain name into an IP address that is used to contact the remote machine.
    EXAMPLES:
    localhost = 127.0.0.7
    giantgeek.com = 99.138.127.198
  • IP addresses (as IPv4) are represented as groups of 4 hexadecimal or decimal octets.
  • Those numbers can be plugged into a simple formula to be represented as a single large integer.

As such, you can use the following as equivalents:

  • http://localhost
  • http://127.0.0.1
  • http://2130706433

REFERENCES:

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