Question : How do I assign IP addesses appropriate and obtain  IP addresses automatically

I having a problem trying to assign 470 users and 2 server ip address, I broke them down by haviing an ip address of  this 10.18.1.0  with 240 users and this will be the 1st server and the 2nd one is 10.18.2.0 with an ip address of 10.18.2.0 with 230 users and this will be the 2nd server . = 470 users w/2 servers.  

should there be 16 ip addresses for the 240 users plus the 1 server?
example:

10.18.1.0 -
10.18.1.1 - 1st user; 10.18.1.1 - 2nd user; 10.18.1.3 - 3rd user......... 10.18.1.240 - 1st server.  


10.18.1.2  1st user 10.18.2.16;  2nd user; 10.18.2.32

not sure please help me to understand how to assign ip address to 470 users w/2 servers.

Answer : How do I assign IP addesses appropriate and obtain  IP addresses automatically

Than why don't you change it
From:
ISNULL(Convert(VarChar(20), a.ApptStart, 108),'')as ApptTime,

To:
ISNULL(Convert(VarChar(5), a.ApptStart, 108),'')as ApptTime,