Vonage and PSTN assigment

Archived from groups: comp.dcom.voice-over-ip (More info?)

>Does anyone know how Vonage is able to assign and port numbers from
>anywhere in the US? Are they a CLEC with their own CIC code or do
>they use a third party service to handle this?

They have deals with CLECs all over the country to provide local PSTN
access. Around here (upstate NY) the CLEC is Paetec, but they use
many different CLECs to get all those local numbers.

Since the other VoIP carriers also use CLECs, I'm more wondering why
the other carriers can't port rather than why Vonage can.