speedtest.interplus.com.pl has no NS records.
NS records for this zone are defined at interplus.com.pl.
NS records for this zone are defined at interplus.com.pl.
Question and response
Question
dig speedtest.interplus.com.pl. NS
Answer
The response has no answer records.
Authority
interplus.com.pl. 600 SOA ns1.itservice4u.pl. lukasz.itservice4u.pl.interplus.com.pl. 2026011502 86400 10800 3600000 10800
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0