417-800-2XXX is a block of numbers administered to a Nevada, Missouri (that's the city of Nevada) telephone company called 3L Communications (not to be confused with Level 3 Communications, which is a much, much larger company).  They are aware of the telemarketing problem and provide information on how to address the problem right on their home page, which is at http://3lcom.net/ .  Give it a try.

Called my cell,  i declined, no message left

Caller ID showed Bartlett Inc.  They left no message.

Called cell,.no message.

Shows up as Bartlett INC i didn't answer the call. No message was left.