Well said ...

too funny.

What I am trying to explain to you guys is simply this.

There is a Database for teleco's

North American Local Exchange NPA NXX Database

My suspicion and experience would lead me to easily believe that they are looking at this DB. This would be the easiest and most cost effective to institute exactly what they are doing.

The DB provides which NXX records are assigned to which telco's and shitload of other info.

They can simply filter out blocks of NXX records based on the Telco.

So, you best solution is a PSTN provider of such a service. But, I am telling you that probably wouldn't last to long when they see multiple people using that provider and realize what is going on and then just block them as well.

For all other intents and purposes everything would see legit and therefore should not be flagged fro CL or others using this type of service.