ftip006236892.acc4.mr.21cn-nte.bt.net has no NS records.
NS records for this zone are defined at acc4.mr.21cn-nte.bt.net.
NS records for this zone are defined at acc4.mr.21cn-nte.bt.net.
Question and response
Question
dig ftip006236892.acc4.mr.21cn-nte.bt.net. NS
Answer
The response has no answer records.
Authority
acc4.mr.21cn-nte.bt.net. 86400 SOA ns0.bt.net. hostmaster.bt.net. 8329 10800 3600 604800 86400
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0