Apex domains cannot have CNAME records.
Question and response
Question
dig web.africa. NS
Answer
web.africa. 3 NS justin.ns.cloudflare.com.
web.africa. 3 NS kiki.ns.cloudflare.com.
Authority
The response has no authority records.
Additional
kiki.ns.cloudflare.com. 5 A 108.162.192.180
kiki.ns.cloudflare.com. 5 A 172.64.32.180
kiki.ns.cloudflare.com. 5 A 173.245.58.180
justin.ns.cloudflare.com. 5 A 108.162.193.187
justin.ns.cloudflare.com. 5 A 172.64.33.187
justin.ns.cloudflare.com. 5 A 173.245.59.187
kiki.ns.cloudflare.com. 5 AAAA 2606:4700:50:0:0:0:adf5:3ab4
kiki.ns.cloudflare.com. 5 AAAA 2803:f800:50:0:0:0:6ca2:c0b4
kiki.ns.cloudflare.com. 5 AAAA 2a06:98c1:50:0:0:0:ac40:20b4
justin.ns.cloudflare.com. 5 AAAA 2606:4700:58:0:0:0:adf5:3bbb
justin.ns.cloudflare.com. 5 AAAA 2803:f800:50:0:0:0:6ca2:c1bb
justin.ns.cloudflare.com. 5 AAAA 2a06:98c1:50:0:0:0:ac40:21bb
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0