Custom Activity needed?

Hi,

i currently have to add an ip adress to 150+ devices based on an already used ip schema. the schema looks like this:

StationName 1053

Hostname: 1053sw1  (also the name in the kiwi database)

IP Adress: 10.10.53.250

 

i need to configure a second ip adress to every device following the same schema but with 192 in front and 254 in the end like this:

192.10.53.254

 

so is it possible to automatically add the right ip adress without an custom activity or is it only possible with the custom activity? if second, can someone explain me how to make the custom activity