[earlJam]

For the same reason that 911 does not have Caller ID?

I had to call 911 yesterday because of a car PARKED on a US freeway.

The dispatcher asked me for my telephone number. I said, “You don’t have Caller ID?”

He said “no” and did not want to talk about it.

[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.