front.mail.ziggo.com has no NS records.
NS records for this zone are defined at mail.ziggo.com.
NS records for this zone are defined at mail.ziggo.com.
Question and response
Question
dig front.mail.ziggo.com. NS
Answer
The response has no answer records.
Authority
mail.ziggo.com. 300 SOA ns1.flowmailer.net. contact.flowmailer.net. 2026021602 86400 7200 7200 3600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0