25.173.71.148.rev.vodafone.pt has no NS records.
NS records for this zone are defined at 71.148.rev.vodafone.pt.
NS records for this zone are defined at 71.148.rev.vodafone.pt.
Question and response
Question
dig 25.173.71.148.rev.vodafone.pt. NS
Answer
The response has no answer records.
Authority
71.148.rev.vodafone.pt. 38400 SOA ns-a1.vodafone.pt. dnsadmin.corp.vodafone.pt. 2020120902 10800 3600 604800 38400
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0