Put the list of centers into an .INI file and read it fromt here. Then you can cycle through them and you can easyly adapt your code. example:
code:
; .INI file
[192.168.0.0]
Call=function1
[192.168.1.0]
Call=function2
code:
$networkids=split(readprofilestring('file.ini','','')
$id=0
$done=0
do
  if isinsubnet(@IPADDRESS0,$networkids[$id]
    $function=readprofilestring('file.ini,$networkids[$id],'Call')
    $rc=execute('$rc='+$function+'()')
    $done=1
  endif
until $id>ubound($networkids) or $done
if not $done
  ; unidentified network
endif
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There are two types of vessels, submarines and targets.