My list is not secret, it is here: https://imcdb.org/links.php#plates
For Israel there is https://meshumeshet.com/
I'll add that other one.

edit: done, and also added the VINWiki trick for the Idao site.

VINWiki can be used to run any valid U.S. license plate to obtain the VIN number. That is, assuming the car isn't imported from another country or older than 1981.

The web version can also be used to run UK number plates.

You need an account to use it, but it's free.

https://web.vinwiki.com/

antp: Not sure if Israel is on your list, but I found this site that can be used to run Israeli license plates. It will return the make/model and the VIN number.

https://www.check-car.co.il/israeli-vin-check/

So it becomes useless for us, I suppose?
I'll remove it from the list then.

Access Idaho moved on to a new website: https://dmvonline.itd.idaho.gov/OpenServices/OpenVehicleServices/CheckRegistrati- on

Unfortunately for us, a VIN is also required for checking a vehicle.

What do you use for Italian plates? A few that I found are "out of service"?

Updated

The "Yakarouler" link for plate identifications is not functional.
https://www.imcdb.org/links.php
https://www.yakarouler.com/pieces-auto/pieces-auto.html

It must be replaced by "Carter-Cash".
https://www.carter-cash.com/pieces-auto/

Doesn't seem to work, at least on my computer. I can't see a field in which to type the plate number.

Thanks, updated