I was researching another post this morning when I came across some interesting information on the ability of 911 services to determine the location of mobile phones. Phase II Enhanced 911 allows location info to be passed along from mobile phones when you dial 911, and while all but eight states have implemented this in 80% or more of their counties, the clickable map above shows it to have still been pretty spotty as of a year ago. Less than half of the states have fully implemented this standard.
Click here for county level details.
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