Example: 1 -> HOST_NOT_FOUND / Authoritative Answer Host not found.
$VAR1 = {
          '-1' => 'NETDB_INTERNAL',
          '0' => 'NETDB_SUCCESS',
          '1' => 'HOST_NOT_FOUND',
          '2' => 'TRY_AGAIN',
          '3' => 'NO_RECOVERY',
          '4' => 'NO_DATA'
        };