Apex domains cannot have CNAME records.
Question and response
Question
dig tmp.pe. NS
Answer
tmp.pe. 5 NS NS2.RCP.NET.pe.
tmp.pe. 5 NS NS.RCP.NET.pe.
Authority
The response has no authority records.
Additional
ns.rcp.net.pe. 5 A 161.132.17.10
ns2.rcp.net.pe. 5 A 209.45.127.3
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0