NS
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... RR in the additional data section is 20 bytes or so,
and there are A's for each SRV and NS RR mentioned in the answer.
This size estimate is extremely crude, but shouldn't underestimate
...
... root.example.com. (
1995032001 3600 3600 604800 86400 )
NS server.example.com.
NS ns1.ip-provider ...
... NS ns1.ip-provider.net.
NS ns2.ip-provider.net.
; foobar - use old-slow-box or new-fast-box if either is
...
... query section is quoted here and doesn't
need to be counted again.
75 bytes for 3 NS RRs, 15 bytes each plus the lengths of "server",
"ns1.ip-provider ...