(720) 496 in Denver, CO

i received at least 10 phone calls from that number and it after i ring it back , it rings and rings and rings. sure must be a robo call

Calling my number after 8:30 in the evening using a local area code

call my home, disturbing a very ill person.

This seems to be the number that pops up on caller ID when different, unrelated businesses in the Denver area are making calls. It's probably owned by a company that operates IP-based PBX systems. Whenever I've received calls from this number, it's been an account manager from E*Trade's Denver office. They've called from this number for at least 2 years. They are just keeping in touch with their customers asking if they want to review their accounts or if they have any questions. They seem to do this every 3-4 months. I'm a customer (not an E*Trade employee) so strictly it's not an unsolicited phone call.

called representing himself as a collection agency, Check Processing, and threatening legal action if not called back.

Left no message, they answer "hello" when you call the number back, but you can hear from the background noise it is some kind of an office setting.

called 1/29/13-19:53 in violation of the TCPA (Telecom Consumers Protection Act)

Unsolicited phone call