"Extension 86" is another feature commonly used in conjunction with the Black List feature. Transfer someone to "Extension 86"
Extension 86 is actually the 'Frustration Hotline' that some use to prank people. Cool Telecom utilizes this line to "86" callers you would prefer not to hear from again. To listen to what your caller hears you can dial "86" on your Cool Telecom phone or just dial it directly at 1.484.271.2468.