Who called from 2143067535

my sister just told me the same # keeps callin her and leaves no messages.

It's to a company Called Client Services Inc. A collections agency

This number keeps calling my cell phone and never leaves a message.They call all hours of the day 10 times a day. Nobody answers when I say hello

Calls me about 3 times a day. No message left or anything.

Spoofed local number for Client Services.  FYI blocking it means they will simply try to use other numbers to get you.