Following is the list of Sanctions from the US Treasury web-site.
Without going through and reading every one, based on the countries listed, I would guess where it has the country and sanctions (ex Cuba Sanctions), we can't ship there.
If it says Related Sanctions (ex Lebanon-Related Sanctions), we should check the customer against the Specially Designated Nationals list on the US Treasury web-site to make sure the customer/end user is not sanctioned.
We definitely cannot sell to Iran and Cuba. If you get a request for any of the other countries listed, the best option is to check with us and we can check with our forwarders for the most current update.