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Protocol

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Details

A OUI (Organizationally Inique Identifier) is the 24-bit left half of a MAC address which identifies the Company
which registered the respective MAC address block.

Unlike a MAC address it typically does not use a colon but a hyphen to separate its 3 Octets:

00-04-0E      AVM GmbH

Each block consists of the right 3 Octets which sum up to 2 ^ 24 = 16,777,216 addresses.

OUI can be purchased from the IEEE MAC Address Block Large (MA-L) registry.

FRITZ!OS

So far (2022-09) AVM registered 34 MA-L OUI blocks:

$ wget https://standards-oui.ieee.org/oui/oui.txt

$ grep '(hex)' oui.txt | grep 'AVM ' | sort

00-04-0E   (hex)		AVM GmbH
00-15-0C   (hex)		AVM GmbH
00-1A-4F   (hex)		AVM GmbH
00-1C-4A   (hex)		AVM GmbH
00-1F-3F   (hex)		AVM GmbH
00-24-FE   (hex)		AVM GmbH
08-96-D7   (hex)		AVM GmbH
1C-ED-6F   (hex)		AVM Audiovisuelles Marketing und Computersysteme GmbH
24-65-11   (hex)		AVM GmbH
2C-3A-FD   (hex)		AVM Audiovisuelles Marketing und Computersysteme GmbH
2C-91-AB   (hex)		AVM Audiovisuelles Marketing und Computersysteme GmbH
34-31-C4   (hex)		AVM GmbH
34-81-C4   (hex)		AVM GmbH
38-10-D5   (hex)		AVM Audiovisuelles Marketing und Computersysteme GmbH
3C-37-12   (hex)		AVM Audiovisuelles Marketing und Computersysteme GmbH
3C-A6-2F   (hex)		AVM Audiovisuelles Marketing und Computersysteme GmbH
44-4E-6D   (hex)		AVM Audiovisuelles Marketing und Computersysteme GmbH
50-E6-36   (hex)		AVM Audiovisuelles Marketing und Computersysteme GmbH
5C-49-79   (hex)		AVM Audiovisuelles Marketing und Computersysteme GmbH
74-42-7F   (hex)		AVM Audiovisuelles Marketing und Computersysteme GmbH
7C-FF-4D   (hex)		AVM Audiovisuelles Marketing und Computersysteme GmbH
98-9B-CB   (hex)		AVM Audiovisuelles Marketing und Computersysteme GmbH
9C-C7-A6   (hex)		AVM GmbH
B0-F2-08   (hex)		AVM Audiovisuelles Marketing und Computersysteme GmbH
BC-05-43   (hex)		AVM GmbH
C0-25-06   (hex)		AVM GmbH
C8-0E-14   (hex)		AVM Audiovisuelles Marketing und Computersysteme GmbH
CC-CE-1E   (hex)		AVM Audiovisuelles Marketing und Computersysteme GmbH
D0-12-CB   (hex)		AVM Audiovisuelles Marketing und Computersysteme GmbH
DC-15-C8   (hex)		AVM Audiovisuelles Marketing und Computersysteme GmbH
DC-39-6F   (hex)		AVM Audiovisuelles Marketing und Computersysteme GmbH
E0-28-6D   (hex)		AVM Audiovisuelles Marketing und Computersysteme GmbH
E8-DF-70   (hex)		AVM Audiovisuelles Marketing und Computersysteme GmbH
F0-B0-14   (hex)		AVM Audiovisuelles Marketing und Computersysteme GmbH

This sums ip to 2 ^ 24 x 34 = 570,425,344 addresses.
Since the IEEE only sells a new block if all prior allocations are used to 95% this is at least 542 million used addresses.
Calculating an average box to get 7 MAC addresses this would be 77 millions of Box-Models.

See the MAC article where they are used.

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