ipv4.csp2013.sci.uz has no NS records.
NS records for this zone are defined at csp2013.sci.uz.
NS records for this zone are defined at csp2013.sci.uz.
Question and response
Question
dig ipv4.csp2013.sci.uz. NS
Answer
The response has no answer records.
Authority
csp2013.sci.uz. 10800 SOA hosting.scinet.uz. davronaka.yahoo.com. 1770677039 10800 3600 604800 10800
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0