network.zixcorp.com has no NS records.
NS records for this zone are defined at zixcorp.com.
NS records for this zone are defined at zixcorp.com.
Question and response
Question
dig network.zixcorp.com. NS
Answer
The response has no answer records.
Authority
zixcorp.com. 300 SOA ns01.zixcorp.com. noc.zixcorp.com. 2025102401 3600 300 2419200 300
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0