Inverso del loopback localhost

;
; ns.local : PTR records para localhost
;
@         IN   SOA         ns.dcc.uchile.cl.   hostmaster.dcc.uchile.cl. (
               1994121613  ;Serial
               10800       ;Refresh
               3600        ;Retry
               3600000     ;Expire
               172800)     ;Minimum

          IN   NS          ns.dcc.uchile.cl.
1         IN   PTR         localhost.