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> Shouldn't my mobile phone network verify that the caller - which was also inside their network - is a valid subscriber? Since the advent of number portabilit
by jaywalk 5y ago
> Shouldn't my mobile phone network verify that the caller - which was also inside their network - is a valid subscriber?
Since the advent of number portability, the area code and prefix no longer signify anything about what carrier a particular number belongs to. You could very easily take your T-Mobile number to Verizon, for example.
- xp84 5y agoThe number itself is no longer permanently their network, sure - however, they have instant access to look up* any number and find who presently owns it - which they must use to be able to route calls successfully. It's completely true that say, T-Mobile could today refuse to connect a call when the caller pretends to be calling from a T-Mobile owned number and yet is calling from outside their network. Sure, it would only kill a subset of the spam if they could only do this when they currently control the spoofed number themselves, however it would still do something! * Source: https://teraquant.com/local-number-portability-and-how-to-troubleshoot/ https://teraquant.com/local-number-portability-and-how-to-tr...