f.qtlgslbcn.info has no NS records.
NS records for this zone are defined at qtlgslbcn.info.
NS records for this zone are defined at qtlgslbcn.info.
Question and response
Question
dig f.qtlgslbcn.info. NS
Answer
The response has no answer records.
Authority
qtlgslbcn.info. 300 SOA g.qtlgslbcn.info. webmaster.qtlgslbcn.info. 1591778141 7200 3600 64800 300
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0