Or at least it was when I called to do it.
They just recently added numbers in Port Orchard, which I consider to be a positive achievement. I figured the Vancouver, WA number I had was not desirable any longer (Vancouver might as well be in Oregon), so I called them up to switch my number over.
I have to give them props on their provisioning system because they immediately invalidated my SIP credentials (thus dropping the call I was on with them). They did warn me that might happen and asked for an alternate number, which they gave me right away.
Within about 5 minutes or so, and a little reconfiguration of my Asterisk server (credentials changed), my new number was up and answering the phone!
Switching numbers was painless 
Linear Mode
