Topic: Ultimaker uses NFC tags. So I scanned one.
I was curious as to what was on the NFC tag on an empty roll of Ultimaker Tough PLA so I scanned it. Here is what came up
ID (hex): 81 5e 32 22 c1 56 04
ID (reversed hex): 04 56 c1 22 32 5e 81
ID (dec): 36413841420146180
ID (reversed dec): 1221287409245825
Technologies: NfcA, MifareUltralight, NdefFormatable
Mifare Ultralight type: Ultralight C