North America. Most countries have "999".

Nope...it's different in other countries. For example, I think it's something like "000" in most regions of Australia.

I think that they are different in all countries but they are closely alike in western countries like the UK.

Mostly North America. India has a different number, but I cannot remember it off the top of my head.

You asked for it. Here are the emergency numbers for around the world. Worldwide Subscribers of Iridium Satellite phone and SOS International can dial 767 (SOS) to get help or medical evacuation to the nearest SOS International medical centre. Africa * Chad: fire 18; police 17 * Djibouti: fire 18; police 17 * Ghana: 999; police 191; fire 192; medical 193 * Morocco: fire 15; police (city) 19; royal military police (country) 177 * South Africa: police or fire 10111; medical 10177; from mobile phones 112 (soon also from fixed line phones) * Tunisia: medical 190; National guard 193; police 197; fire 198 * Uganda: police 999 * Zimbabwe: 999; fire 993; medical 994; police 995 Asia * People's Republic of China o Mainland: police 110; fire 119; rescue 120; traffic accident 122 o Hong Kong: 999 (voice); 992 (fax on fixed line; SMS on mobile phones - latter being only available to subscribers with disabilities); 112 can be dialed from mobile phones o Macau: 999 * Republic of China (Taiwan): fire and medical 119; police 110 * India: police 100; fire 101; medical 102; traffic police 103. (112 calls dialed from Nokia handsets only are redirected to the local emergency number.) * Indonesia: o Police: 110 o Ambulance: 118 and 119. o Search and Rescue team: 115. o Natural Disaster: 129. o Electricity: 123. o Fire Department: 113. o Cellular phone and Satellite phone emergency number: 112 * Japan: police 110; emergency at sea 118; fire and medical 119 * Malaysia: police and medical 999; fire 994; civil defense 991;112 can be dialed from mobile phones * Mongolia: 100; police 101; medical 102 * Philippines: 112 or 911; police 117 * Singapore: fire and medical 995; police 999 * Sri Lanka: accident service 11-2691111 * South Korea: police 112; fire and medical 119 * Thailand: police 191; fire 199; medical 1669 * Pakistan: police 15 * Vietnam: 115; police 113; fire 114 * Turkey: fire 110; police 155; medical 112; Gendarmerie: 156; Coast Guard 158 * Kuwait: 777 * Lebanon: police 112; * Iran: general(police, fire, medical) 110; police 110; medical 115; fire 125. 112 also works for all emergencies from mobile phones. * Israel: police 100; medical 101; fire 102 * Qatar: 999 * Kingdom of Saudi Arabia: police 999; fire 998; traffic police 993; medical 997; rescue emergency 911, 112, or 08 * The United Arab Emirates: police 999; fire 998; medical 997 Europe [SOS 112] [SOS 112] * Most common emergency number 112 (also standard on GSM mobile phones) — used in Austria, Belgium, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Liechtenstein, Lithuania, Luxembourg, Republic of Macedonia, Netherlands, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, and the United Kingdom (sources: European Radiocommunications Office, European Union, SOS 112 Europe). * Austria: fire 122; police 133; medical 144 * Belgium: 112; fire and medical 100; police 101; missing children 110; mental problems/suicide 106 * Bulgaria: medical 150; fire 160; police 166 * Croatia: 112; police 92; fire 93; medical 94; road help 987 * Cyprus: 112; 199 * Czech Republic: 112; medical 155; fire 150; police 158; municipal police 156 * Denmark: police, fire, medical, environment 112 * Estonia: 112; police 110 * Finland:police, fire, medical, environment 112 * France: 112; medical (more severe) 15; police 17; fire, rescue and medical (less severe) 18 * Germany: police 110; fire and ambulance 112; ambulance (rural areas) 19222 * Greece: 112; police 100; medical 166; fire 199; forest fire 191; coast guard emergency intervention 108; counter-narcotics immediate intervention 109 * Hungary: 112; police 107; fire and rescue 105; medical 104 * Iceland: 112 * Ireland: 112 or 999 * Italy: police and 113; Carabinieri (military police) 112; medical 118; fire or disaster 115; Guardia di Finanza (Italian Customs/Financial/Border Police) 117 * Latvia: 112; fire and rescue 01; police 02; medical 03; gas leaks 04 * Lithuania: 112; fire 01, 101, or 011; police 02, 102, or 022; medical 03, 103, or 033. Note: the non-112 numbers are for separate emergency services differ in distinct telecommunications networks, whereas 112 available on all networks. * Macedonia, Republic of: 112; police 192; fire 193; medical 194 * Netherlands: 112; police (non-urgent) 0900-8844 * Norway: fire and rescue 110; police 112; medical 113 * Poland: 112; medical 999; fire 998; police 997; municipal wardens 986; natural gas/LPG emergencies 992 * Portugal: 112; forest fire 117 * Romania: 112. Mountain Rescue is usually beyond the scope of 112 and each mountain rescue station has its own number. A call to 112 will usually get you through to Mountain Rescue, but is far slower than calling directly. * Russia: fire 01; police (militsia) 02; medical 03; gas leaks 04; general emergency from mobile phone 112 * Serbia: 112; police 92; fire 93; medical 94 * Slovakia: 112; medical 155; fire 150; police 158 * Slovenia: 112; police 113; rescue, fire and medical 112 * Spain: 112; police 091; local police 092; Civil Guard 062; Mossos d'Esquadra (catalan police) 088; fire 080 or 085; medical 061 * Sweden: 112 * Switzerland: fire 118; police 117; medical 144; poison 145; road emergency 140; psychological support (free and anonymous) 143; psychological support for teens and children (free and anonymous) 147; helicopter air-rescue (Rega) 1414 or by radio on 161.300 MHz. The European emergency number 112 is also supported, and is the one recommended for use from mobile phones. * Ukraine: 112 being implemented; fire 01; police (militsia) 02; medical 03; gas leaks 04 * United Kingdom: 999 or 112. 101 is now used as a non-emergency number for police and local authorities in several areas in England and Wales, and will be extended to cover all of England and Wales by 2008. Oceania * Australia: 000. On a mobile phone, dial 112 or 000, remembering to tell the operator what state you are in. If you have a textphone/TTY, you can use the National Relay Service on 106. SES units in Victoria, New South Wales and South Australia can be contacted on 132 500. In Western Australia, the number is 1300 130 039. In the ACT, the number is 6207 8455. In Queensland, Tasmania and Northern Territory, you will have to call the individual units. * Fiji: fire and medical 911; police 917 * New Zealand: 111; urgent but not emergency police/traffic number *555 (from mobile phones only). Redirect connects many popular foreign emergency numbers. From mobile phones, the international emergency numbers 112, 911 and 08 also work. The 0800 161616 TTY and 0800 161610 fax numbers are operated by the police for all three services. * Vanuatu: 112 North America * Canada: 911 * Mexico: 066; 060 or 080 * USA: 911 * Jamaica: 119 * Dominican Republic: 911 * Saint Pierre et Miquelon: 17 police, 18 fire, 15 ambulance South America * Argentina: medical 107; police 101; fire 100; emergency dispatcher for Buenos Aires (city) and Buenos Aires (province) 911 * Bolivia: medical 118; police 110 * Brazil: human rights 100; emergency number for Mercosul area 128; fire 193; medical 192; police 190; federal police 194; civil police 197; civil defense 199; federal highway police 191; state highway police 198. See also: Brazilian telephone numbering plan#Public utility. * Chile: medical 131; fire 132; police 133 * Colombia: 112 or 123 (landlines and mobile phones); police 156; fire 119; traffic accidents 127; medical 132; GAULA (anti-kidnapping) 165. More specialized three-digit numbers are available; check the local Yellow Pages for more information. * Peru: fire 711 * Suriname: 115 * Uruguay: 911 * Venezuela: 171 http://en.wikipedia.org/wiki/Emergency_telephone_number#Emergency_numbers_by_country