MongoDB Object ID Structure (12 bytes)

MongoDB's ObjectID is a 12-byte identifier broken down into the following components:

Component	Size (bytes)	Bitwise Breakdown	Description
Timestamp	4 bytes	0 - 31 (0x00000000 - 0xFFFFFFFF)	32-bit Unix timestamp (seconds since epoch)
Machine ID	3 bytes	32 - 55 (0x000000 - 0xFFFFFF)	Identifier for the machine generating the ObjectID
Process ID	2 bytes	56 - 71 (0x0000 - 0xFFFF)	Process ID across multiple processes
Counter	3 bytes	72 - 95 (0x000000 - 0xFFFFFF)	Counter for IDs created at the same timestamp

• Timestamp (4 bytes): 6758617b
• Machine ID (3 bytes): 454a2a
• Process ID (2 bytes): 80b8
• Counter (3 bytes): 5fedd1

Output

Machine ID: EJ*
6758617b454a2a80b85fedc3
6758617b454a2a80b85fedc4
6758617b454a2a80b85fedc5
6758617b454a2a80b85fedc6
6758617b454a2a80b85fedc7
6758617b454a2a80b85fedc8
6758617b454a2a80b85fedc9
6758617b454a2a80b85fedca
6758617b454a2a80b85fedcb
6758617b454a2a80b85fedcc
6758617b454a2a80b85fedcd
6758617b454a2a80b85fedce
6758617b454a2a80b85fedcf
6758617b454a2a80b85fedd0
6758617b454a2a80b85fedd1