I am not sure. The exchange I know for sure that is supporting the upgrade is Bittrex.
Shiit,hope not to loose them.i held 1000 of it on exchange(hitbtc) for some emergency situation,lol.now hitbtc said you cant move ardor because of maintenance.i saw there people exchanging that still.
You are safe, that's your lucky day my friend!
https://nxtplatform.org/exchanges-supporting-nxt-snapshot-ignis-airdrop/
Happy new year!
But its says NXt coins on these exchanges are taking ignis after snapshot and say nothing about ardors.i have ardor token on hitbtc,after jan 1 release of ardor's mainnet all tokens on nxt wallet will transfer to main ardor wallet.i hope ardors on exchanges dont burn after ardor release.