We get calls from this number sometimes as frequently as 5 times a week.  Most of the time there is no answer.  A few times we have spoken to someone who says they are from the cancer society or the firemen's association selling tickets for a magic show.  When we get a person we asked to be taken off their call list.  
We've decided to answer and then hang up as soon as it connects.  Feels rude but this is a real nuisance we are trying to discourage.

I dont seem to have the same exact issue. I had my close relitave which's number is from the east coast and the number is NOT private cause its my mother and I know and 3 times she tried to call it came up with (604) 855-7584. I obveously have the same call back tone problem. is the phone tapped???? or what is up with this? it only started today.

This number is a calling # that will show up on your caller ID when people dail a certain number that gives you free long distance calls to anywhere in north america. I used to have the number and website but I can't remember it.  Anyways many companies including large ones like Rogers and Fido as well as bill or debt collectors all have started using this number to call clients or customers.  The (604) 855-7584 number is just the default routing phone # that is used to call customers in the lower mainland.  I will try to find the website again because it is handy to use to call anywhere for free.  Companies on the other hand should not be so cheap and they should not be allowed to use it because it covers their true identity.

My commodities broker calls me from Chicago and this number comes up. On another thread this number is identified as a major carrier trunk line. That is it is a major feed line for calls coming into Canada. It is probably used mainly by companies marketing some product or service but it also appears with cellular calls across the border. Roaming on cell, etc.

Or it could be boogie men, that sounds reasonable too!!!

this guy stoled my wallet and i want him bad...........

The number is a default number for blocked numbers.  When my husband calls from work from out on the work site, this is the number that shows.  You can not call it back-you get a long beep.