gov to irsauctions.gov: The following NS name(s) were found in the authoritative NS RRset, but not in the delegation NS RRset (i.e., in the gov zone): ns5.irs.gov, ns2.irs.gov, ns4.irs.gov, ns6.irs.gov, ns3.irs.gov, ns1.irs.gov See RFC 1034, Sec. 4.2.2.