The Panasonic KX-TG9392T is a land line phone system; it's support page is available here:
https://shop.panasonic.com/support-only/KX-TG9392T.html . IMEI (International Mobile Equipment Identity) numbers apply to mobile phones. Thus there is no such number for a corded/cordless land line phone. There is a FCC registration for the cordless (radio) transmitter in the phone system. That number simply proves that the company tested the phone to ensure it does not cause interference with other radio frequencies beyond those it is supposed to use.
I hope this helps.
Cindy Wells
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