ns2.xfoneusa.net has no NS records.
NS records for this zone are defined at xfoneusa.net.
NS records for this zone are defined at xfoneusa.net.
Question and response
Question
dig ns2.xfoneusa.net. NS
Answer
The response has no answer records.
Authority
xfoneusa.net. 3600 SOA dns1.nts-online.net. admin.nts-online.net. 638182428 7200 1200 3600000 3600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0