[Lonesome in Massachussets]

I know for a fact that 911 definitely has caller id in some jurisdictions. A 911 hang up will result in a visit by the local constabulary.

[Dan(9698)]

Most have ID, and also the Latitude and Longitude of the caller.

The location is also shown on a map for the dispatcher.

[Keith in Iowa]

>>>I know for a fact that 911 definitely has caller id in some jurisdictions. A 911 hang up will result in a visit by the local constabulary.

True for land-line originated calls. Not always true for cellular originated calls - the really up to date dispatch centers would not only get your cell phone # when you call 911, but your phone’s GPS would tell the dispatcher where you are.