Apple has updated their page explaining what LTE bands cover what networks and where with information for both the iPhone 5s and iPhone 5c. You can also see which model numbers each variant will carry both within the US and internationally. It looks to line up model wise to what we already see in the iPhone 5.
During Apple's live iPhone event they touted how many more LTE networks would be supported for both the iPhone 5s and iPhone 5c. This is evident on the updated LTE page by the number of bands compared to the iPhone 5 which can be found by scrolling further on down the page.
If you didn't have LTE support with the iPhone 5, are you seeing it now with the iPhone 5s and iPhone 5c?