The airdrop tokens / coins are listed in several exchangers.
If you visit coinmarketcap.com, you can easily find out, on which exchanger your airdrop is listed.
Go at coinmarketcap.com on top to the right corner, there will find a search field. Just type the token name there.
You will find all informations about this token.
Here you can find a lot of exchangers, where your airdrop tokens could be listed: