ns300.interserver.net has no TXT records.
Question and response
Question
dig ns300.interserver.net. TXT
Answer
The response has no answer records.
Authority
interserver.net. 1800 SOA ns100.interserver.net. dns.cloudflare.com. 2397871000 10000 2400 604800 1800
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0