nic.ibm IN A 129.42.38.1 nic.ibm IN NS a.nic.ibm nic.ibm IN NS b.nic.ibm nic.ibm IN NS c.nic.ibm nic.ibm IN NS x.nic.ibm nic.ibm IN NS y.nic.ibm nic.ibm IN NS z.nic.ibm