zimbra.ukservers.com has no NS records.
NS records for this zone are defined at ukservers.com.
NS records for this zone are defined at ukservers.com.
Question and response
Question
dig zimbra.ukservers.com. NS
Answer
The response has no answer records.
Authority
ukservers.com. 60 SOA ns1.ukservers.com. networks.ukservers.com. 2026030200 1800 7200 1814400 60
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0