server1a.sim720.co.uk has no NS records.
NS records for this zone are defined at sim720.co.uk.
NS records for this zone are defined at sim720.co.uk.
Question and response
Question
dig server1a.sim720.co.uk. NS
Answer
The response has no answer records.
Authority
sim720.co.uk. 180 SOA ns0.dnsmadeeasy.com. dns.dnsmadeeasy.com. 2008010682 43200 3600 1209600 180
Additional
. 0 OPT ; payload 1280, xrcode 0, version 0, flags 0