Mifare UID Decimal formats

Example:

Sector 0 Block 0 Data: 80 CD E6 D6 7D 88 04 00 88 98 00 20 00 00 00 F8

Single size UID (4-byte)

UID "in order" (Big Endian): 80 CD E6 D6

UID "in reverse bytes order" (Little Endian/Intel): D6 E6 CD 80

Decimal: 3605450112

References: 

• https://www.starnfc.com/mifare-1k-uid-number-format 
• https://www.mifare.net/support/forum/topic/mifare-uid-number