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A comment on Thieves drain 2FA-protected bank accounts by abusing SS7 routing protocol. Parent comment

Re:Thieves drain 2FA-protected bank accounts by abusing SS7 ... by derefr on Thursday May 04, 2017 @09:33PM (#14270478)
AFAIK you can get a number from a different carrier and then transfer it to the VoIP carrier. When queried, it will still show up as "owned" by the original carrier.
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Re:Thieves drain 2FA-protected bank accounts by abusing SS7 ... by toast0 on Friday May 05, 2017 @10:03AM (#14273482)
It depends on how they classify; numbers are issued in blocks of 1000, and the allocations are public knowledge, but you can also do a real time carrier lookup, which changes after porting completes.
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