ns4.networktechnologysolutions.com has no CNAME records.
Question and response
Question
dig ns4.networktechnologysolutions.com. NS
Answer
The response has no answer records.
Authority
networktechnologysolutions.com. 226 SOA ns1.networktechnologysolutions.com. support.networkts.com. 2017102501 43200 120 1209600 300
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0