Which NFC Tag is this?
ATQA 00 44 SAK 00 = Mifare Ultralight 7Byte UID
ATQA 00 04 SAK 08 = Mifare Classic 1K 4Byte UID
Mine: ATQA 00 44 SAK 08 16 Sectors 64 Blocks
$ nfc-list
nfc-list uses libnfc libnfc-1.7.1-191-g216145f
NFC device: ACS ACR122U / ACR122U214 opened
1 ISO14443A passive target(s) found:
ISO/IEC 14443A (106 kbps) target:
ATQA (SENS_RES): 00 44
UID (NFCID1): 02 d7 f9 c2 a4 29 10
SAK (SEL_RES): 08
It seems to be Mifare Classic 1K with a double-size (7 byte) UID