On my mobile 999, 911 and 112 will connect to the emergency services. 999 is the UK number, 911 is the USA number, 112 is used by most of the EU.

"Regional Emergency Numbers

Anywhere in the world one can call an emergency telephone number for emergency help. These numbers include:

"911" in North America
"999" or "112" in the United Kingdom
"112" in Europe
"000" in Australia
"111" in New Zealand
"119" in parts of Asia "

Stu