Is it possible to record several NFC cards on one?

Question

NFC

Hello, I came up with an idea to make my life easier and record "Troika", the key to the intercom and work on one NFC tag.
Tell me, is it possible to implement this? What will be required for this?

Answer 1

IMHO, no. Is there really a technology that will allow you to recognize the right one from 3 keys on one label?

Answer 2

Can. It is called an NFC-enabled smartphone. For external (relative to the NFC chip) data processing is required.
By the way, there is a suspicion that in the intercom and at work you have a tag at 128 kHz, and Troika at 13 MHz, i.e. they are radio compatible.