Going to need more clarification.
Are you referring to a phone number? Telus doesn't deal with US phone numbers. There won't be a US number that is the same as a Canadian phone number because the area codes are all different.
I've never heard of Telus nor any other provider offering anything like that.
The area code for a phone number is specific to a specific province in Canada. No provider can offer a duplicate number to one that is already in use from any provider. Are you perhaps referring to someone spoofing or faking a phone number on call display when the call out?
Please explain, in detail, what you're inquiring about.