spf2.npl.co.uk has no NS records.
NS records for this zone are defined at npl.co.uk.
NS records for this zone are defined at npl.co.uk.
Question and response
Question
dig spf2.npl.co.uk. NS
Answer
The response has no answer records.
Authority
npl.co.uk. 600 SOA ednssvr1.npl.co.uk. postmaster.npl.co.uk. 2026012205 28800 7200 1209600 86400
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0