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  • 64
    The dots are also for convenience; the real IP is 11000000101010000000000000000001
    – cpast
    Commented Dec 28, 2014 at 4:15
  • 14
    @cpast or as a hexadecimal number: C0A80001
    – jfs
    Commented Dec 28, 2014 at 8:34
  • 13
    or as octal number (starting with 0, with or without dots) e.g. ping 0300.0250.2.0144 for 192.168.2.100
    – Sergey
    Commented Dec 28, 2014 at 17:50
  • 15
    or as a decimal number 3232235521
    – oldmud0
    Commented Dec 29, 2014 at 2:52
  • 14
    As @GreenstoneWalker 's answer pointed out, many programs will not perceive of them as the same; a number with a leading zero (that does not contain the digits 8 or 9) will be understood as an octal-notation number; therefore 010.000.001.063 would be interpreted as "8.0.1.51" (octal 010 = decimal 8; octal 063 = decimal 51) instead of "10.0.1.63"!
    – Doktor J
    Commented Dec 29, 2014 at 21:54