Apex domains cannot have CNAME records.
Question and response
Question
dig ppb.worldline.com. NS
Answer
ppb.worldline.com. 5 NS dns1.cscdns.net.
ppb.worldline.com. 5 NS dns2.cscdns.net.
Authority
The response has no authority records.
Additional
dns1.cscdns.net. 3 A 156.154.130.100
dns2.cscdns.net. 3 A 156.154.131.100
dns1.cscdns.net. 3 AAAA 2610:a1:1022:0:0:0:0:100
dns2.cscdns.net. 3 AAAA 2610:a1:1023:0:0:0:0:100
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0