how to fetch ip list from website ?

Hi everyone,

I’m newbie and I need drop all udp packet from other country. I do follow this http://blog.erben.sk/2014/02/06/country-cidr-ip-ranges/

when I use this command

/tool fetch url=http://www.iwik.org/ipcountry/mikrotik/SK

I get error

failure: unable to resolve hostname

How to fix it ?