Unfortunately you can no longer check the remaining days/options on your tickets anywhere but at WDW, at the resorts or the parks guest serivces. The reason as I undestand it is two fold;
1~ People reading the CM"s the numbers on the back of the ticket could make a mistake reading the # or the CM could make a typo resulting in an innaccurate answer by the CM.
2~ To help in the prevention of the reselling of tickets, illegal by FL law.
Sorry but you will have to wait until you get to WDW unless you know someone who can have them checked for you
TJ