ftp.rambler.com.pl has no NS records.
NS records for this zone are defined at rambler.com.pl.
NS records for this zone are defined at rambler.com.pl.
Question and response
Question
dig ftp.rambler.com.pl. NS
Answer
The response has no answer records.
Authority
rambler.com.pl. 86400 SOA rambler.com.pl. rg.rambler.com.pl. 2025040901 28800 7200 604800 86400
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0