Apex domains cannot have CNAME records.
Question and response
Question
dig polandspringswater.com. NS
Answer
polandspringswater.com. 4 NS ns-777.awsdns-33.net.
polandspringswater.com. 4 NS ns-1256.awsdns-29.org.
polandspringswater.com. 4 NS ns-1505.awsdns-60.org.
polandspringswater.com. 4 NS ns-1727.awsdns-23.co.uk.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0