I've used broadvoice before for personal telephony, and they were competent and asterisk-friendly, and seemed to have DIDs in many US LCAs. <http://broadvoice.com>

Just to throw another name into the arena http://voicepulse.com/ Pros: SIP and IAX termination Many US NPP/NXX exchanges and 800 numbers Config examples for many PBXs POPs on both coasts Good knowledgeable customer support Cons: Not all NPP/NXX offer LNP (Local Number Portability) Credit card verification process is annoying, but I understand why We have used them for several customers as well as our own SIP termination. Disclaimer: I am not affiliated with them in anyway, just a satisfied customer. Tom Walsh

I have used the CallWithUs guys (http://callwithus.com) and they seem to very reasonable. They have an emphasis on keeping things simple, and are happy to chat with you on a technical level if needed. On Mon, Jan 12, 2009 at 12:01 PM, Michael Holstein < michael.holstein@csuohio.edu> wrote:

Hi, I am looking for a solution where I can tie a US number to a SIP

...

solution. Has anyone had experience with this and if so can you make some recommendations?

I use Flowroute myself (www.flowroute.com) .. you can do single DIDs tied to a SIP peer, virtual PRIs, and a number of other things. You can even get a free account to test your setup. Here's the list of area codes they offer them in : http://www.flowroute.com/services/dids/

I'm just using it for my personal Asterisk setup, so I'm not sure how they scale out. They claim to support thousands of simultaneous calls to most international destinations.

Here's a link to a bunch of others : http://www.voip-info.org/wiki/view/DID+Service+Providers

Cheers,

Michael Holstein Cleveland State University