Meta Platforms, Inc. - MAC Prefix 509903 (MA-L)

What this means

The IEEE assigned the MA-L block 509903 to Meta Platforms, Inc.. Every network interface they manufacture under this block has a MAC address beginning with these digits, followed by a unique per-device identifier. If a device on your network shows a MAC starting 50:99:03, it is Meta Platforms, Inc. hardware.

Frequently Asked Questions

Who owns MAC prefix 509903?

509903 is registered to Meta Platforms, Inc. in the IEEE MA-L registry.

What does the MA-L registry type mean?

An MA-L assignment, the IEEE's original OUI format, gives the vendor the first three octets and 16,777,216 device addresses under them. Meta Platforms, Inc.'s block covers 16,777,216 addresses.

What devices use 509903?

Any network device with a MAC address starting 50:99:03 was manufactured by or for Meta Platforms, Inc..

Other Meta Platforms, Inc. prefixes

Meta Platforms, Inc. holds 13 registered blocks in total.

OUI prefix	509903
Vendor	Meta Platforms, Inc.
Registry	MA-L (24-bit, large block)
Block size	16,777,216 addresses
Country	US
Other blocks by this vendor	13 total
Example MAC	50:99:03:00:00:00