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It is possible to "spoof" caller id.

If you operate your own PBX or you use one of the IP (internet) phone services with lax security, you can change the number that shows up on caller id to be anything you want it to be.

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Q: How is it possible for a subscriber's name and phone number to show up on his own home phone caller id as if he had called his own number from his own phone?
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