how to make speed dials without using speed dials
 

I have realized that there is a way to make speed dials without using speed dials. But using only dial plans.
For example, if I set:
Pattern: _66601
Replacement: VoipStunt_account
Provider: VoipStunt
all the calls to 66601 will be redirected to sip:VoipStunt_account@sip.voipstunt.com.
So, I can use 666 as prefix instead ** to identify a speed dial.
One bond with respect speed dial is that I have to set up the provider whose account I want to call. Register is no needed.
I decided to use 666 because if it works for all users it could be diabolic since VoXaLot staff did communicate that speed dials will be available only to premium members. Nevertheless, I think that it is right to share this (bad? right?) intuition with all of you. Or maybe is such thing already known?