Which voip service provider can i connect with asterisk

i want my asterisk server to conect to abroad voip service provider.
i should prepare a voip gateway like SIPSER at first .And can you tell a list of voip service providers abroad which support asterisk? and how much should i pay for it? thanks.

best regards.

firstly, where is “abroad” ?? and does it matter where they are ?

the homepage at voip-info.org/wiki/ has links to VoIP service providers … knock yourself out. you won’t need any additional hardware/software at your end as long as your asterisk server can get ‘out’.

you’ll pay what you feel is appropriate for a termination service for the destination called.