checking if a .biz domain is in the roots

[ST]

I've got a customer who was awarded a .biz domain. It was from the batch
of duplicate applications submitted by the same person.  He says the
domain hasn't been added to the roots. When I do a dig on it, I get:

; <<>> DiG 8.3 <<>> hisdomain.biz
;; res options: init recurs defnam dnsrch
;; got answer:
;; ->>HEADER<<- opcode: QUERY, status: NXDOMAIN, id: 4
;; flags: qr aa rd ra; QUERY: 1, ANSWER: 0, AUTHORITY: 1, ADDITIONAL: 0
;; QUERY SECTION:
;;      hisdomain.biz, type = A, class = IN

;; AUTHORITY SECTION:
biz.                    1D IN SOA       a.gtld.biz. hostmaster.gtld.biz.
(
                                        3028013         ; serial
                                        30M             ; refresh
                                        15M             ; retry
                                        1W              ; expiry
                                        1D )            ; minimum

Does this mean it's not in the roots, or could it be an issue with his
DNS server?

Thanks,

ST