I had a voicemail displayed originally on the phone as (no number) but when i checked the voicemail and the computer voice woman was reading off the number she said

Your call back number is nine... one... one... and then it was no message.

Scared me :P But I never knew you could call from 9-1-1 considering when the number is called, it's just routed to a million different numbers where people answer your call.

Idno..