ns4.internic.net aka. j.gtld-servers.internic.net was just returning false authoritative nxdomain answers for any .com domain that I tried. While it isn't a .com nameserver, that IP address is floating around and my nameserver still asked it and listened when it gave a nxdomain: $ORIGIN HYPERREAL.com. ;taz 287 IN SOA A.ROOT-SERVERS.NET. hostmaster.INTERNIC.NET. ( ; 1997111700 1800 900 604800 86400 );com.;NXDOMAIN ;-$ ;Cr=auth [198.41.0.21] yes, yes, I am still using 4.9.6 but I'm not ready to upgrade to 8.x yet. In any case, it is still bogus to return authoritative nxdomain. Now (10 minutes later), ns4.internic.net is properly reporting: ; <<>> DiG 2.2 <<>> worldgate.com ns @198.41.0.21 ; (1 server found) ;; res options: init recurs defnam dnsrch ;; got answer: ;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 10 ;; flags: qr aa rd; Ques: 1, Ans: 0, Auth: 1, Addit: 0 ;; QUESTIONS: ;; worldgate.com, type = NS, class = IN ;; AUTHORITY RECORDS: com. 86400 SOA A.ROOT-SERVERS.NET. hostmaster.INTERNIC.NET. ( 1997111700 ; serial 1800 ; refresh (30 mins) 900 ; retry (15 mins) 604800 ; expire (7 days) 86400 ) ; minimum (1 day) ;; Total query time: 111 msec ;; FROM: valis.worldgate.com to SERVER: 198.41.0.21 ;; WHEN: Tue Nov 18 02:45:29 1997 ;; MSG SIZE sent: 31 rcvd: 108 I think I have seen problems caused by something similar a couple of times in the past week or two, only then I couldn't track them down because it had gone back to giving proper responses. Anyone know what is going on there and if it is resolved or just gone for a while again?