Called and got "this call cannot be completed as dialed,the number you have dialed has been disconnected or is no longer in service. please check the number or call your operator for further assistance.

And yet they call me .  How???.......
Just spoke to operator and was told ,they can't do anything because the number is outside of their system. The only action they can take is to change my number.   I'll try to answer next time and tell the mysterious caller to stop.

Just reversed lookup the number ,, it's a cable/telecom company .
Happy reading.

Cablevision Lightpath, Inc. provides Ethernet-based data, Internet, voice, video transportation solutions, and managed services to businesses across the New York metropolitan area. It offers E-line, V-line, E-LAN, virtual private ring, and optical transportation services; and video transport service, a bandwidth solution that is designed to address the needs of media production facilities, broadcasters, television stations, video relay bureaus, content distributors, and enterprises that have high-resolution and broadcast-quality image requirements. The company also provides private fiber network, a fiber solution that is designed to meet the needs of education (K-12) customers; private fiber...