My first post though I have been a long time lurker and hope to contribute now.
Since I found an answer here, I thought I'd post an update in case anyone is interested.
I'm experiencing broken Telecom DNS servers on the North Shore Auckland for the past 3 hours. Telecommunications broadband support (1 person hung up and one person was useless for 40 minutes before saying I should call back at 7 am) didn't help.
I can ping external web IP numbers but domain names say 'unable to resolve host'. I didn't realize I could change DNS servers to non-telecom but I found a post here mentioning Google's 220.127.116.11 server which I tried and all works. I needed to do some work late this evening - internet is like electricity to me and Telecom saying I'd be down 8+hrs was just crazy, so your posts here helped greatly and I'm thankful this community exists.