The nameserver IP's do look like local IP's and do not point to a valid nameserver. What happens if you do e.g. (from commandline)
Because your testing here only shows your local Bind server resolves for it's own internal network.
With the dig google.com you should at least see the ANSWER section like:
;; ANSWER SECTION:
google.com. 300 IN A 18.104.22.168
google.com. 300 IN A 22.214.171.124
google.com. 300 IN A 126.96.36.199