mail.o2wifi.co.uk has no NS records.
NS records for this zone are defined at o2wifi.co.uk.
NS records for this zone are defined at o2wifi.co.uk.
Question and response
Question
dig mail.o2wifi.co.uk. NS
Answer
The response has no answer records.
Authority
o2wifi.co.uk. 3600 SOA n1.02.net. hostmaster.02.net. 2026031602 900 600 86400 3600
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0