My router updated itself automatically to 220.127.116.11 the first time I switched it on. I have never had any problems with it at all since that time. I have also been reading the long thread about 18.104.22.168 and have decided not to try it out.
My DNS settings currently are
Domain Name Server (DNS) Address
Use These DNS Servers
Primary DNS 22.214.171.124
Secondary DNS 126.96.36.199