I remember.... Google's Namebench app led me to try Cox's DNS servers at 68.4.16.30 and 68.4.16.25
Those are usable off Cox net.
nslookup
Default Server: UnKnown
Address: 192.168.0.1
> server 68.4.16.25
Default Server: ns2.oc.cox.net
Address: 68.4.16.25
> google.com
Server: ns2.oc.cox.net
Address: 68.4.16.25
Non-authoritative answer:
Name: google.com
Addresses: 2607:f8b0:4000:80a::200e
216.58.218.206
> server 68.4.16.30
Default Server: ns1.oc.cox.net
Address: 68.4.16.30
> apple.com
Server: ns1.oc.cox.net
Address: 68.4.16.30
Non-authoritative answer:
Name: apple.com
Addresses: 17.142.160.59
17.172.224.47
17.178.96.59
>