obase=2
 31 = 0001 1111  Merry      Subnetwork address is 144.154.16.0 or 0001
 16 = 0001 0000  Aragorn                                  --   or 1 (one)
 16 = 0001 0000  Gimli
 16 = 0001 0001  Legolas
 17 = 0001 0001  Samwise
 19 = 0001 0011  Boromir

100 = 0110 0100  Bifur      Subnetwork address is 144.154.96.0 or 0110
111 = 0110 1111  Strider                                  --   or 6 (six)

125 = 0111 1101  Bofur      Subnetwork address is 144.154.112.0 or 0111
                                                          ---   or 7 
                                                                (seven)
220 = 1101 1100  Frodo      Subnetwork address is 144.154.208.0 or 1101
213 = 1101 0101  Bilbo                                    ---   or 13
223 = 1101 1111  Gollum     11010000 = 128 + 64 + 0 + 16
208 = 1101 0000  Gandalf             = 208

244 = 1111 0100  Sauron     Subnetwork address is 144.154.240.0 or 1111
                                                          ---   or 15

                               and Sauron.middleearth.com is the only
                               unpaired computer all by itself in the 
                               listed collection, except for Bofur on
                               subnetwork 144.154.112.0 shown above.
                               Sauron and Bofur should get together!

math-cs:~/web/023> bc
                        bc 1.06 Copyright 1991-1994, 1997, 1998, 2000 
                        Free Software Foundation, Inc. 
                                                    bc for b = basic
                                                           c = calculator
ibase=2        <---- change input base (ibase) to base two,
                                                  by requesting ibase=2

11010000         <-- input is the binary number 11010000
208              <-- output is base ten number 208


                         <------- use control-d to exit bc calculator
math-cs:~/web/023>        
math-cs:~/web/023>bc

obase=16    <------------- base 16 (base sixteen) or hexadecimal
                                    will be the output base for bc
220 = DC
213 = D5
223 = DF               See how base 16 could be useful!
208 = D0               D = 1101 and all of these begin with D or 1101
                       Call it (Frodo, Bilbo, Gollum, and Gandalf) the
                                D network if you want, or the
                                208, which is 11010000 or 144.154.208.0
                                              ----

244 = F4

100 = 64          The 6 network or the 01100000 = 96 network for Bifur
111 = 6F                               ----                  and Strider
                                                  on 144.154.96.0 subnet.

 31 = 1F          The 1 network or the 16 (SIXTEEN) network, since 
 17 = 11          1 = 0001 and 00010000 = 16...
 19 = 13                       ----                144.154.16.0 subnet...
 16 = 10          For Merry, Aragorn, Gimli, Legolas,
                      Samwise and Boromir.