sms.furrera.ps has no NS records.
NS records for this zone are defined at furrera.ps.
NS records for this zone are defined at furrera.ps.
Question and response
Question
dig sms.furrera.ps. NS
Answer
The response has no answer records.
Authority
furrera.ps. 3600 SOA ns1.furrera.ps. sys.furrera.ps.furrera.ps. 2025112701 14400 1800 1209600 3600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0