What this means
The IEEE assigned the MA-L block 0040CC to SILCOM MANUF'G TECHNOLOGY 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 00:40:CC, it is SILCOM MANUF'G TECHNOLOGY INC. hardware.
Frequently Asked Questions
Who owns MAC prefix 0040CC?
0040CC is registered to SILCOM MANUF'G TECHNOLOGY 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. SILCOM MANUF'G TECHNOLOGY INC.'s block covers 16,777,216 addresses.
What devices use 0040CC?
Any network device with a MAC address starting 00:40:CC was manufactured by or for SILCOM MANUF'G TECHNOLOGY INC..