You could. Just send your IMEI number to iphone unlock zone, let them check it for blacklisted and icloud lock status. After that they will inform what service you should purchase. The counting days start after you pay the purchase service, normally 5-6 working days will be done.
If you got unlocked from blacklisted status, do not to use the SIM Card from the same country of the blacklisted iPhone, it may ger relocked.
Hope this information useful. Thank you.