0100e95004038000 -

The serial number (40 bits) is large enough for unique device tracking. The trailing 8000 might be a simple CRC-16 or a fixed magic number. Many systems use 0x8000 (32768 decimal) as an invalid or sentinel value. If we treat the first 6 bytes ( 0100e9500403 ) as data and 0x8000 as a checksum, we could test common CRC-16-CCITT or XOR checksums.

00 80 03 04 50 e9 00 01 → 0x0080030450e90001 0100e95004038000

| Field | Bits | Hex value | Decimal | |--------------|--------|-----------|---------| | Header | 8 | 0x01 | 1 | | Manufacturer | 16 | 0x00e9 | 233 | | Serial | 40 | 0x5004038000 | 344,689,606,656 | The serial number (40 bits) is large enough

As a decimal: 36,055,477,910,044,673