81-90-48-216.addr.refertelecom.pt has no NS records.
NS records for this zone are defined at addr.refertelecom.pt.
NS records for this zone are defined at addr.refertelecom.pt.
Question and response
Question
dig 81-90-48-216.addr.refertelecom.pt. NS
Answer
The response has no answer records.
Authority
addr.refertelecom.pt. 86400 SOA ns.addr.refertelecom.pt. root.refertelecom.pt. 2016081202 28800 7200 1209600 86400
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0