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DNS server question
Hi there,
I have a question regarding Comcast DNS server addresses: When looking in the Xfinity Network section of my rented XB8-Techicolor the IPV4 DNS primary server 1 is 75.75.75.75 and the IPV4 DNS secondary server is 75.75.76.76. The IPV6 DNS primary server is 2001:558:feed::1 and the secondary IPV6 address is 2001:558:feed::2 .
Out of curiosity I did a 'what's my DNS server test' and it gave a different result. It showed my IPV4 DNS servers were 76.96.24.1, 76.96.24.3, 76.96.24.21, and 76.96.24.7 . It showed my IPV6 DNS addresses were 2001:558:fee0:8320:76:96:24:3 , and 2001:558:fee0:8320:76:96:24:1 . All of the addresses shows as located in Ashburn, USA.
Why would there be a difference like this? Thanks in advance!
BruceW
Gold Problem Solver
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26.7K Messages
10 hours ago
The addresses in your first paragraph are Anycast addresses (see https://en.wikipedia.org/wiki/Anycast). Anycast is basically a method for steering requests to to the "closest" server. The addresses of the actual DNS servers are the ones in your second paragraph. It looks odd, but it's normal for Anycast routing.
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