This number called me constantly until they got my voiceprint. This is a shadow company which is actually covertly the NSA trying to get a voiceprint on all US citizens by recording their voice when they answer. They will keep calling back until they get a "good print". You can't do anything to combat this - if there is silence, speak an entire sentence very clearly and I promise this number will stop calling you. Just give them the voiceprint. This is not a conspiracy, but the truth. I am posting from an anonymous internet cafe account and have researched this number for quite some time now.