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garin22's profile

1 Message

Tuesday, January 9th, 2024 11:39 AM

Default CLID in incoming calls


I have noticed some issues with SIP inbound calls to my non-AT&T landlines from customers with AT&T numbers.

As far as I can see, different customers are calling my numbers using the same Caller ID.

I have asked several customers which actual number they are calling from, and they are calling from different numbers, belonging to AT&T.

It appears that when AT&T makes SIP INVITE to different carrier, in some cases it replaces the original Caller ID of caller with some default Caller ID

Maybe someone from here can give a hint on this situation



19.7K Messages

5 months ago

With the Internet any number can be spoofed and it's a common practice of spammers. If you ask them anything they will most likely lie.

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