isi.edu CNAME records

CNAME Canonical name
Apex domains cannot have CNAME records.

Question and response

Question

dig isi.edu. NS

Answer

isi.edu. 5 NS ns2.isi.edu. isi.edu. 5 NS ns4.isi.edu. isi.edu. 5 NS ns3.isi.edu.

Authority

The response has no authority records.

Additional

ns2.isi.edu. 5 A 128.9.40.13 ns3.isi.edu. 5 A 128.9.49.6 ns4.isi.edu. 5 A 128.9.40.14 . 0 OPT ; payload 1232, xrcode 0, version 0, flags 0