What this means
The IEEE assigned the MA-L block 001389 to Redes de Telefonía Móvil S.A.. 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 00:13:89, it is Redes de Telefonía Móvil S.A. hardware.
Frequently Asked Questions
Who owns MAC prefix 001389?
001389 is registered to Redes de Telefonía Móvil S.A. 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. Redes de Telefonía Móvil S.A.'s block covers 16,777,216 addresses.
What devices use 001389?
Any network device with a MAC address starting 00:13:89 was manufactured by or for Redes de Telefonía Móvil S.A..