Yeah, they are filler (well at least compared to the manga version) because the manga ends after their fight and we only got one more chapter in the future when both Naruto and Sasuke have become parents. (also we got a quick look at other characters).
Some of the episodes (483+) do show some flashback for the characters that we did not know before but they were never shown in the manga before, so if you follow the manga they are still considered "filler". And there is also the weeding :P.
Anyway the situation on them is not 100% clear, i guess it depends how you define filler for yourself.
Here is a list that can help you for a bit.