USA = 911
Canada = 911
United Kingdom = 999 or 112
European Union = 112
Australia = 000
China = 911
Estonia = 112 for F and A, 110 for P.
France = 15 for A, 18 for F, 17 for P.
Germany = 112 for A and F, 110 for P.
Hong Kong = 999
Italy = 118 for A, 115 for F, and 112 for P
Japan = 119 for F and A, 110 for P.
Mexico City = 08
Malaysia = 999 for P and A, 994 for F.
New Zealand = 111
Norway = 113 for A, 110 for F, 112 for P.
Romania = 961 for A, 981 for F, 955 for P.
Singapore = 999 for P, 995 for A and F.
Taiwan = 119 for F and A, 110 for P
Key: A=Ambulance, F=Fire, P=Police.
/msg me with additions and corrections.
Here I was having fun trying to hunt these things down, when I find this. It should give you any information you need. But if you have a specific country that you think should be added to this node, let me know!
Thanks to Nordicfrost, alex.tan and dwyn for input.
Eritain says and in much of the ex-USSR, it's worth trying 01, 02, 03 for F, P, A respectively. These are the numbers in Russia, Ukraine, some networks in Latvia, Lithuania ... it's a legacy system.