this is an alarm company located in Canada.  It is possibly ADT from an office in Vancouver.  they also call from 604-210-6300

Apparently ADT.pLEASE REMOVE MY NUMBER

Why do these 604 256 1397 calls land at my house....No one speaks, and they hang up...or they know which and how many computers I have.....and they are (SURPRISE) selling!!! something that one one wants....

The caller is a telemarketing firm in New Westminster, BC, trying to sell alarm
systems and house insurance. The accent was so thick I could barely understand that was being offered. When I mentioned I was on the no call list, they hung up.. These people are well aware of the no call list but have a provider other than Telus and as such are difficult to trace. Telus was not at all helpful as the number is not one they provide service to. Its time for a change to the CRTC rules that allows Telus to take back control of their equipment.

Do not want calls from 1-604-256-1397.
No one ever responds when I answer.