It is possible that those IPs are from the same physical location but it's not likely. The reason is that most network administrators will try to keep IP addresses grouped together for troubleshooting and tracking purposes. If you suspect that this person is using a computer with a redundent connection at NOC then it's more reasonable but someone sitting in a home or office is not very likely.
Since both of these are seperate Class A Subnets and there are only 64 available in the entire world I don't think that one physical connection could get both of those IP addresses.
63.138.223.69
65.48.137.218
Rogers is a backbone and is probably providing services for other networks. When I do a trace route it takes very different paths so I think the physical locations are not even close.
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