promproxy1.one.com has no NS records.
NS records for this zone are defined at one.com.
NS records for this zone are defined at one.com.
Question and response
Question
dig promproxy1.one.com. NS
Answer
The response has no answer records.
Authority
one.com. 300 SOA a.b-one-dns.net. hostmaster.one.com. 2026032303 1800 900 1209600 300
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0