com to level3.com: The following NS name(s) were found in the authoritative NS RRset, but not in the delegation NS RRset (i.e., in the com zone): ns1.level3.net, ns2.level3.net See RFC 1034, Sec. 4.2.2.
com to level3.com: The following NS name(s) were found in the delegation NS RRset (i.e., in the com zone), but not in the authoritative NS RRset: ns1.l3.net, ns2.l3.net See RFC 1034, Sec. 4.2.2.