Altmarkets is a great exchange as most coin devs that left Cryptohub exchange as it was closing moved their coins there, some went to IRCEX as it is a working process so nconsider this exchange to list GCN.
https://altmarkets.cc/Thanks.
Bitsten is a very good exchange in devlepement
https://bitsten.comcrex24 is new exchange but this exchange very good .
a new altcoin have been listed on this exchange , at first