de to devk.de: The following NS name(s) were found in the authoritative NS RRset, but not in the delegation NS RRset (i.e., in the de zone): ns2.vodafone-ip.de
de to devk.de: The following NS name(s) were found in the delegation NS RRset (i.e., in the de zone), but not in the authoritative NS RRset: ns1.arcor-ip.de