vmail1.infinitecom.net has no NS records.
NS records for this zone are defined at infinitecom.net.
NS records for this zone are defined at infinitecom.net.
Question and response
Question
dig vmail1.infinitecom.net. NS
Answer
The response has no answer records.
Authority
infinitecom.net. 180 SOA ns20.digicertdns.com. dns.digicertdns.com. 2009011505 43200 3600 1209600 180
Additional
. 0 OPT ; payload 1280, xrcode 0, version 0, flags 0