10.11.12.13 is in the 10.0.0.0/8 block which is used in private networks. Addresses within this block do not legitimately appear on the public Internet. Addresses within 10.0.0.0/8 can be used without any coordination with IANA or an Internet registry.
[ RFC1918 - Address Allocation for Private internets ]

Integer: 168496141

            /\________/\
        |  /____    ____\  |
        | //    \  /    \\ |
        [{|      ||      |}]
	  \\____/  \____//
           \    ____    /
        _   \   \__/   /   _
        \\  /\_______ /\  //
         \\IPDUUHHHHUUDPI//