Should be working now, you might want to try again
[carl@mars ~]$ dig ns packethead.net @i.gtld-servers.net
; <<>> DiG 9.6.2-P2 <<>> ns packethead.net @i.gtld-servers.net
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 53545
;; flags: qr rd; QUERY: 1, ANSWER: 0, AUTHORITY: 4, ADDITIONAL: 8
;; WARNING: recursion requested but not available
;; QUESTION SECTION:
;packethead.net. IN NS
;; AUTHORITY SECTION:
packethead.net. 172800 IN NS ns2.he.net.
packethead.net. 172800 IN NS ns3.he.net.
packethead.net. 172800 IN NS ns4.he.net.
packethead.net. 172800 IN NS ns5.he.net.
;; ADDITIONAL SECTION:
ns2.he.net. 172800 IN A 216.218.131.2
ns2.he.net. 172800 IN AAAA 2001:470:200::2
ns3.he.net. 172800 IN A 216.218.132.2
ns3.he.net. 172800 IN AAAA 2001:470:300::2
ns4.he.net. 172800 IN A 216.66.1.2
ns4.he.net. 172800 IN AAAA 2001:470:400::2
ns5.he.net. 172800 IN A 216.66.80.18
ns5.he.net. 172800 IN AAAA 2001:470:500::2
;; Query time: 104 msec
;; SERVER: 192.43.172.30#53(192.43.172.30)
;; WHEN: Tue Sep 7 12:46:24 2010
;; MSG SIZE rcvd: 283
[carl@mars ~]$ dig ns packethead.net
; <<>> DiG 9.6.2-P2 <<>> ns packethead.net
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 44015
;; flags: qr rd ra; QUERY: 1, ANSWER: 4, AUTHORITY: 0, ADDITIONAL: 8
;; QUESTION SECTION:
;packethead.net. IN NS
;; ANSWER SECTION:
packethead.net. 14291 IN NS ns3.he.net.
packethead.net. 14291 IN NS ns2.he.net.
packethead.net. 14291 IN NS ns4.he.net.
packethead.net. 14291 IN NS ns5.he.net.
;; ADDITIONAL SECTION:
ns3.he.net. 75 IN A 216.218.132.2
ns3.he.net. 75 IN AAAA 2001:470:300::2
ns2.he.net. 85 IN A 216.218.131.2
ns2.he.net. 294 IN AAAA 2001:470:200::2
ns4.he.net. 23 IN A 216.66.1.2
ns4.he.net. 196 IN AAAA 2001:470:400::2
ns5.he.net. 88 IN A 216.66.80.18
ns5.he.net. 196 IN AAAA 2001:470:500::2
;; Query time: 245 msec
;; SERVER: 2001:470:c27d:e000:41bd:d9bf:9b66:9b95#53(2001:470:c27d:e000:41bd:d9bf:9b66:9b95)
;; WHEN: Tue Sep 7 12:48:02 2010
;; MSG SIZE rcvd: 283