Apex domains cannot have CNAME records.
Question and response
Question
dig co.mw. NS
Answer
co.mw. 4 NS domwe.sdn.mw.
co.mw. 4 NS chambo.sdnp.org.mw.
co.mw. 4 NS ns4.apnic.net.
co.mw. 4 NS mw-e.ns.nic.cz.
co.mw. 4 NS pch1.nic.mw.
co.mw. 4 NS rip.psg.com.
Authority
The response has no authority records.
Additional
ns4.apnic.net. 1 A 202.12.31.53
rip.psg.com. 1 A 147.28.0.39
pch1.nic.mw. 1 A 204.61.216.131
domwe.sdn.mw. 1 A 41.87.2.154
domwe.sdn.mw. 1 A 41.87.5.162
domwe.sdn.mw. 1 A 196.45.190.9
chambo.sdnp.org.mw. 1 A 102.219.183.67
chambo.sdnp.org.mw. 1 A 196.45.188.5
ns4.apnic.net. 1 AAAA 2001:dd8:12:0:0:0:0:53
rip.psg.com. 1 AAAA 2001:418:1:0:0:0:0:39
pch1.nic.mw. 1 AAAA 2001:500:14:6131:ad:0:0:1
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0