Dave wrote on Apr 22
nd, 2006 at 2:56pm:
It is an international freephone number and should be free from UK landlines.
I see you have also posted a
thread on MSE about this, to which you have said that it's Swedish.
This is an International FreePhone number. That is one that is free to call from almost anywhere in the world provided you call on a domestic home landline. Of course mobile phone providers will almost certainly charge you at their 0800 Freephone rate which is not free and usually excluded from bundled minutes. This number also ought to be free to call from any BT Payphone too although the fact that it doesn't require you to put money in would confirm this.
In general 00 800 Freephone numbers have the same characteristics as 0800 to call except you can also call them free from another country too and not just within the UK. The actual call centre could be located anywhere in the world since as far as the international call routing country code system is required the 800 is a country code for the country called Freephone that can in fact be anywhere in the world. As there aren't that many 00 800 numbers they only need the one code to serve them all.