There's also a ton of E911 infrastructure already for exactly this problem (USA, your number may vary!). It's not done at the user level and certainly not by a

There's also a ton of E911 infrastructure already for exactly this problem (USA, your number may vary!). It's not done at the user level and certainly not by a third party. https://en.wikipedia.org/wiki/Enhanced_9-1-1 https://en.wikipedia.org/wiki/Enhanced_9-1-1