$TTL 604800; default TTL is 7 days
@ IN SOA server__.grs.deei. root.grs.deei. (
    49
    10800
    3600
    604800
    86400
)

; define nameservers and mailservers
    IN NS server__.grs.deei.
    IN MX 5 server__.grs.deei.

; define hosts
localhost IN A 127.0.0.1
server01 IN A 10.11.160.1
server02 IN A 10.11.160.2
 .
 . (completa a lista!)
 .
server15.grs.deei. IN A 10.11.160.15

; define aliases
www IN CNAME server__.grs.deei.
smtp IN CNAME server__.grs.deei.
pop3 IN CNAME server__.grs.deei.

; delegate a subdomain
nerds IN NS server01.grs.deei.