Below is result.
# dig SRV _kerberos._ tcp.din.uem.br
; <<>> DiG 9.8.2rc1-RedHat-9.8.2-0.23.rc1.el6_5.1 <<>> SRV
_kerberos._
tcp.din.uem.br
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NXDOMAIN, id: 55207
;; flags: qr rd ra; QUERY: 1, ANSWER: 0, AUTHORITY: 1, ADDITIONAL: 0
;; QUESTION SECTION:
;_kerberos._. IN SRV
;; AUTHORITY SECTION:
. 10668 IN SOA
a.root-servers.net.
nstld.verisign-grs.com. 2014101000 1800
900 604800 86400
;; Query time: 1 msec
;; SERVER: 10.30.0.15#53(10.30.0.15)
;; WHEN: Fri Oct 10 09:15:56 2014
;; MSG SIZE rcvd: 104
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NXDOMAIN, id: 9293
;; flags: qr rd ra; QUERY: 1, ANSWER: 0, AUTHORITY: 1, ADDITIONAL: 0
;; QUESTION SECTION:
;tcp.din.uem.br. IN SRV
;; AUTHORITY SECTION:
din.uem.br. 3468 IN SOA ns2.din.uem.br. analistas.din.uem.br. 2014032613
1800 900 60480 3600
;; Query time: 0 msec
;; SERVER: 10.30.0.15#53(10.30.0.15)
;; WHEN: Fri Oct 10 09:15:56 2014
;; MSG SIZE rcvd: 82
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