Comcast had a DNS outage a week ago. And I've noticed sporadic DNS failures in general. Comcast has grown really big as a network and so perhaps it's just growing pains.
Anyway, if you find yourself DNS-less, you can easily remember this number: 188.8.131.52. You can also remember 184.108.40.206, which is a secondary DNS server. These are servers from GTE I think.
You can plug them into your router or computer DNS entries and get right back in business.
I used to know Microsoft's DNS servers which are quite reliable but I can't find the numbers anymore. So I'm going with 220.127.116.11 and 18.104.22.168 which are very easy to remember in a pinch and are working fine for me.
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