spf.telrad.biz has no NS records.
NS records for this zone are defined at telrad.biz.
NS records for this zone are defined at telrad.biz.
Question and response
Question
dig spf.telrad.biz. NS
Answer
The response has no answer records.
Authority
telrad.biz. 86400 SOA arhimed.telrad.net. root.arhimed.telrad.net. 2021122010 10800 3600 1209600 86400
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0