NFC Cards that Flipper Zero Can read This is a short list of cards and NFC Tags that have worked for me. Be advised that I am in the US so if you are abroad or outside the US that mileage may vary.
Card or Tag Flipper Zero Setting
T5777 Card Freq 125K | 125 kHz RFID Read MiFare Classic Card | NFC Read MiFare Classic Clear Tag | NFC Read HID Card Freq 125KHZ | 125 kHz RFID Read FourPoints.Com Card NFC | NFC Mifare Ultral/NTAG Read Gen1A 1k S50 HF RFID Card | NFC Read UID Freq 13.56MHZ Card | NFC Read Hotel KeyCards | NFC Read ValuProx 125kHz ISO | 125 kHz RFID Read