gw0a.ch-zh.ng.keepit.com has no CNAME records.
Question and response
Question
dig gw0a.ch-zh.ng.keepit.com. NS
Answer
The response has no answer records.
Authority
keepit.com. 611 SOA pns41.cloudns.net. hostmaster.keepit.com. 2026030550 43200 7200 1209600 86400
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0