Not sure if this is the right board, but it's the closest one I can find. I'm trying to find a way to call this number 800.893.893
from the UK.
Google says simply dial 00
first as this is the exit code, however dialing 00 800 893 890
doesn't work, the call immediately ends.
Also tried adding 39 which is the country code, so 00 39 800 893 890
however this is an invalid number.
Number is in Italy.
80...
numbers are toll-free, like British0800
numbers. The owner of a toll-free number can choose to have it only available domestically (there'll be higher costs for accepting international calls). I don't know for certain if that applies in Italy, but it seems likely. It may be that this particular number just isn't available if you're calling from a non-Italian number. In that case, your best option will be to find other means of contact (i.e. a standard phone number, email, etc)