ccTLD/uk/co.ukについて、ここに記述してください。
$ dnsq ns netbenefit.co.uk nsd.nic.uk
2 netbenefit.co.uk: 102 bytes, 1+0+2+2 records, response, noerror query: 2 netbenefit.co.uk authority: netbenefit.co.uk 172800 NS ns2.netbenefit.co.uk authority: netbenefit.co.uk 172800 NS ns3.netbenefit.co.uk additional: ns2.netbenefit.co.uk 172800 A 185.26.230.14 additional: ns3.netbenefit.co.uk 172800 A 185.26.230.15