Well, and then my ISP happens to have the best DNS-servers in my country...
Furthermore I would clearly refuse to put in a static DNS in my router configuration since you never know when they decide to shut a DNS server down or when a DNS server is outdated and has to do three more hops to solve the URL you are seeking.
Tell your home-net that your router is the DNS-server, he will get a fresh DNS after the 24h disconnect and all will be fine.