nl.apifon-mail.com has no NS records.
NS records for this zone are defined at apifon-mail.com.
NS records for this zone are defined at apifon-mail.com.
Question and response
Question
dig nl.apifon-mail.com. NS
Answer
The response has no answer records.
Authority
apifon-mail.com. 900 SOA ns-1312.awsdns-36.org. awsdns-hostmaster.amazon.com. 1 7200 900 1209600 86400
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0