What this means
The IEEE assigned the MA-L block 00087B to RTX Telecom A/S. 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 00:08:7B, it is RTX Telecom A/S hardware.
Frequently Asked Questions
Who owns MAC prefix 00087B?
00087B is registered to RTX Telecom A/S 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. RTX Telecom A/S's block covers 16,777,216 addresses.
What devices use 00087B?
Any network device with a MAC address starting 00:08:7B was manufactured by or for RTX Telecom A/S.