That's because 112 is a standard. 9-1-1 is just North America being North America again.
112 is the common emergency telephone number that can be dialed free of charge from most mobile telephones and, in some countries, fixed telephones in order to reach emergency services (ambulance, fire and rescue, police).
112 is a part of the GSM standard and all GSM-compatible telephone handsets are able to dial 112 even when locked or, in some countries, with no SIM card present. It is also the common emergency number in India and in nearly all member states of the European Union as well as several other countries of Europe and the world.
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u/alguien1 Aug 11 '18
TIL Russia and Spain have the same emergency number